CN115449372A - Biochar for promoting cadmium-polluted soil remediation and preparation method and application thereof - Google Patents
Biochar for promoting cadmium-polluted soil remediation and preparation method and application thereof Download PDFInfo
- Publication number
- CN115449372A CN115449372A CN202211021334.8A CN202211021334A CN115449372A CN 115449372 A CN115449372 A CN 115449372A CN 202211021334 A CN202211021334 A CN 202211021334A CN 115449372 A CN115449372 A CN 115449372A
- Authority
- CN
- China
- Prior art keywords
- biochar
- bidens
- sesbania
- cadmium
- aster
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002689 soil Substances 0.000 title claims abstract description 74
- 238000005067 remediation Methods 0.000 title claims abstract description 37
- 230000001737 promoting effect Effects 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 240000006021 Solidago canadensis Species 0.000 claims abstract description 108
- 235000003657 Solidago canadensis Nutrition 0.000 claims abstract description 108
- 244000104272 Bidens pilosa Species 0.000 claims abstract description 104
- 235000010662 Bidens pilosa Nutrition 0.000 claims abstract description 104
- 239000002994 raw material Substances 0.000 claims abstract description 103
- 241000490229 Eucephalus Species 0.000 claims abstract description 73
- 244000074881 Conyza canadensis Species 0.000 claims abstract description 56
- 235000004385 Conyza canadensis Nutrition 0.000 claims abstract description 56
- 240000004082 Bidens tripartita Species 0.000 claims abstract description 52
- 235000000621 Bidens tripartita Nutrition 0.000 claims abstract description 52
- 238000002156 mixing Methods 0.000 claims abstract description 27
- 238000001354 calcination Methods 0.000 claims abstract description 22
- 241000219782 Sesbania Species 0.000 claims description 123
- 239000002245 particle Substances 0.000 claims description 65
- 239000003610 charcoal Substances 0.000 claims description 48
- 229910052793 cadmium Inorganic materials 0.000 claims description 31
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 claims description 31
- 238000001035 drying Methods 0.000 claims description 29
- 241000607059 Solidago Species 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 13
- 230000001603 reducing effect Effects 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 244000173297 Medicago polymorpha Species 0.000 claims description 2
- 235000017823 Medicago polymorpha Nutrition 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 244000062720 Pennisetum compressum Species 0.000 claims 1
- 239000007858 starting material Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 18
- WLZRMCYVCSSEQC-UHFFFAOYSA-N cadmium(2+) Chemical compound [Cd+2] WLZRMCYVCSSEQC-UHFFFAOYSA-N 0.000 abstract description 3
- 244000275012 Sesbania cannabina Species 0.000 abstract 2
- 241000143476 Bidens Species 0.000 description 53
- 238000010438 heat treatment Methods 0.000 description 41
- 229910001385 heavy metal Inorganic materials 0.000 description 17
- 230000009467 reduction Effects 0.000 description 16
- 238000007873 sieving Methods 0.000 description 13
- 241000196324 Embryophyta Species 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 11
- 241000842328 Bidens bipinnata Species 0.000 description 8
- 235000017060 Arachis glabrata Nutrition 0.000 description 6
- 244000105624 Arachis hypogaea Species 0.000 description 6
- 235000010777 Arachis hypogaea Nutrition 0.000 description 6
- 235000018262 Arachis monticola Nutrition 0.000 description 6
- 235000020232 peanut Nutrition 0.000 description 6
- 241001013934 Erigeron breviscapus Species 0.000 description 5
- 241000208838 Asteraceae Species 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 241000218922 Magnoliophyta Species 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 241001233957 eudicotyledons Species 0.000 description 3
- 238000002386 leaching Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 241000894007 species Species 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 241000208837 Asterales Species 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 241001465178 Bipolaris Species 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 2
- QPCDCPDFJACHGM-UHFFFAOYSA-N N,N-bis{2-[bis(carboxymethyl)amino]ethyl}glycine Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(=O)O)CCN(CC(O)=O)CC(O)=O QPCDCPDFJACHGM-UHFFFAOYSA-N 0.000 description 2
- 241001499733 Plantago asiatica Species 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 239000012298 atmosphere Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000009616 inductively coupled plasma Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 230000004083 survival effect Effects 0.000 description 2
- 238000002054 transplantation Methods 0.000 description 2
- 241000222382 Agaricomycotina Species 0.000 description 1
- 241000534456 Arenaria <Aves> Species 0.000 description 1
- 241000309551 Arthraxon hispidus Species 0.000 description 1
- 241001061264 Astragalus Species 0.000 description 1
- 241000213948 Astragalus sinicus Species 0.000 description 1
- 241000498899 Bidens frondosa Species 0.000 description 1
- 239000002028 Biomass Substances 0.000 description 1
- 241000722885 Brettanomyces Species 0.000 description 1
- 235000007516 Chrysanthemum Nutrition 0.000 description 1
- 240000005250 Chrysanthemum indicum Species 0.000 description 1
- 244000052363 Cynodon dactylon Species 0.000 description 1
- 241001091442 Hydrangeaceae Species 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 241000008871 Microula Species 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 244000100205 Robinia Species 0.000 description 1
- 241000220221 Rosales Species 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 239000010828 animal waste Substances 0.000 description 1
- 239000012300 argon atmosphere Substances 0.000 description 1
- 235000006533 astragalus Nutrition 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000005341 cation exchange Methods 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 230000002354 daily effect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000003415 peat Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 238000012799 strong cation exchange Methods 0.000 description 1
- 210000004233 talus Anatomy 0.000 description 1
- 238000004227 thermal cracking Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/02—Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only
- C09K17/04—Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only applied in a physical form other than a solution or a grout, e.g. as granules or gases
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/05—Preparation or purification of carbon not covered by groups C01B32/15, C01B32/20, C01B32/25, C01B32/30
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to the field of remediation of cadmium-contaminated soil, and discloses biochar for promoting remediation of cadmium-contaminated soil, and a preparation method and application thereof. The biochar is selected from at least two of bidens tripartita biochar, horseweed biochar, solidago canadensis biochar, aster rhynchophylla biochar, bidens pilosa biochar and sesbania biochar. The preparation method comprises the following steps: pretreating and calcining the raw materials, and mixing to obtain the biochar for promoting the remediation of the cadmium-polluted soil; the raw materials are at least two selected from the group consisting of bidens tripartita, horseweed herb, solidago canadensis, aster scabra, bidens pilosa and sesbania. The biochar can effectively improve the removal rate of effective cadmium ions in soil, and further improve the remediation effect of cadmium-polluted soil.
Description
Technical Field
The invention relates to the technical field of cadmium-polluted soil remediation, and particularly relates to biochar for promoting cadmium-polluted soil remediation and a preparation method and application thereof.
Background
With the rapid development of industry and agriculture and the continuous acceleration of urban processes, the emission of heavy metals from industry, agriculture and daily life is increasing, and the soil is increasingly polluted by the heavy metals. Soil is one of important natural resources for human survival and development and a foundation on which the whole land ecosystem exists, and is also one of important environmental elements. Heavy metals in soil are harmful to not only the growth of crops but also the health of animals and human beings through migration and transformation.
The in-situ remediation is an effective method as a soil heavy metal pollution treatment technology, is generally regarded by people, is particularly suitable for remedying farmland soil with large area and excessive medium and light heavy metals, and realizes the production and remediation of heavy metal polluted farmland. Applying the heavy metal adsorbent to the soil is an economical in-situ treatment method for repairing the heavy metal contaminated soil. The soil is applied with the heavy metal repairing material, and the biological effective state of the soil heavy metal is converted into the biological unavailable state by changing the pH value of the soil and the chemical form and occurrence state of heavy metal elements in the soil, increasing the adsorption point position, promoting the coprecipitation of heavy metal ions and other components (including the repairing material) of the soil and the like, so that the migration and biological effectiveness of the heavy metal in the soil are inhibited, the toxicity of heavy metal pollutants to environmental organisms is reduced, and the aim of repairing the heavy metal polluted soil is fulfilled.
The biochar is a carbonaceous material produced by thermal cracking under an anoxic condition on the basis of biomass resources (crop straws, forest and fruit branches, animal wastes and the like) widely existing in the nature. The carbon content of the biochar is 40-75% by mass, and a small amount of mineral substances and volatile organic compounds are also contained, so that the biochar is alkaline and is not easily decomposed by environmental microorganisms. In addition, the biochar is a porous substance, has an extremely rich void structure and a huge specific surface area, and has strong adsorption performance due to the characteristics, so that the biochar has strong cation exchange performance (large cation exchange capacity), and can adsorb heavy metal elements in soil and effectively slow down heavy metal pollution of the soil. However, the removal rate of effective cadmium ions in soil by the biochar in the prior art still needs to be improved.
Disclosure of Invention
The invention aims to solve the problem that the removal rate of the biochar to effective cadmium ions in soil needs to be improved in the prior art, and provides the biochar for promoting the remediation of the cadmium-polluted soil.
In order to achieve the above objects, the present invention provides, in one aspect, a biochar for promoting remediation of cadmium-contaminated soil, the biochar being selected from at least two of bidens tripartita biochar, horseweed biochar, solidago canadensis biochar, aster rhynchophylla biochar, and sesbania biochar.
Preferably, the biochar is selected from at least three of bidens tripartita biochar, horseweed biochar, solidago canadensis biochar, aster rhynchophylla biochar, bidens pilosa biochar, and sesbania biochar.
Further preferably, the biochar is selected from three of bidens tripartita biochar, horseweed biochar, solidago canadensis biochar, aster rhynchophylla biochar, bidens pilosa biochar, and sesbania biochar.
More preferably, the biochar is solidago canadensis biochar, bidens pilosa biochar, and sesbania biochar.
Further preferably, the ratio by mass of the solidago canadensis charcoal, the bidens pilosa charcoal and the sesbania charcoal is 1.
Still further preferably, the mass ratio of the bidens pilosa biochar to the sesbania biochar is 1.
The second aspect of the invention provides a preparation method of biochar for promoting cadmium-contaminated soil remediation, which comprises the following steps: pretreating and calcining the raw materials, and mixing to obtain the biochar for promoting the remediation of the cadmium-polluted soil; the raw materials are selected from at least two of bidens tripartita, horseweed herb, solidago canadensis, aster rhynchophylla, bidens pilosa and sesbania.
Preferably, the raw material is selected from at least three of bidens tripartita, horseweed herb, solidago canadensis, aster scabra, bidens pilosa, and sesbania.
Further preferably, the raw material is selected from three of bidens tripartita, horseweed herb, solidago canadensis, aster rhynchophylla, bidens pilosa, and sesbania.
More preferably, the feedstock is solidago canadensis, bidens pilosa, and sesbania.
Further preferably, the mixing mass ratio of the solidago canadensis, the bidens pilosa and the sesbania after calcination is 1.
Still more preferably, the mixing mass ratio of the bidens pilosa to the sesbania after calcination is 1.
Preferably, the step of pre-treating comprises: drying the raw materials and crushing the dried raw materials into particles.
Preferably, the conditions of the calcination include: the temperature is 400-500 ℃ and the time is 1-3h.
The third aspect of the invention provides the biochar for promoting the remediation of the cadmium-contaminated soil in the first aspect and/or the application of the biochar prepared by the preparation method in the second aspect in reducing the cadmium content in the soil.
According to the invention, the biochar is limited to at least two of bidens tripartita biochar, horseweed biochar, solidago canadensis biochar, aster bifolius biochar, bidens bipinnata biochar and sesbania biochar, and the cadmium reduction capability of the biochar can be effectively improved through the interaction between the at least two biochar, so that the remediation effect of cadmium-polluted soil can be further promoted.
Detailed Description
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
As described above, the present invention provides in a first aspect a biochar for promoting remediation of cadmium-contaminated soil, the biochar being selected from at least two of burclover biochar, horseweed biochar, solidago canadensis biochar, aster rigescens biochar, bidens pilosa biochar, and sesbania biochar.
Specifically, the biochar may be selected from two of bidens tripartita biochar, horseweed biochar, uniflower canada biochar, aster bifidus biochar, bidens triphylla biochar, and sesbania biochar, such as a combination of bidens triphylla biochar and horseweed biochar, a combination of bidens triphylla biochar and canada uniflower biochar, a combination of bidens triphylla biochar and aster bifidus biochar, a combination of bidens triphylla biochar and sesbania biochar, a combination of bidens bipolaris biochar and canada uniflower biochar, a combination of horseweed biochar and aster bifidus biochar, a combination of horseweed biochar and bidens triphylla biochar, a combination of small horseweed biochar and sesbania biochar, a combination of bidens bipolaris and bidens biochar, a combination of bidens bipinna biochar and bidens bipinna biochar, a combination of aster bipinna biochar and a biochar, or a combination of bidens biochar and sesbania bifidus biochar.
The biochar may also be selected from three of bidens tripartita biochar, horseweed herb biochar, canadian solidago biochar, aster bifida biochar, bidens triphylla biochar, and sesbania biochar, such as the combination of bidens tripartita biochar, horseweed biochar, and canadian solidago biochar, the combination of bidens triphylla biochar, horseweed biochar, and aster bifida biochar, the combination of bidens triphylla biochar, horseweed biochar, and bidens triphylla biochar, the combination of bidens triphylla biochar, canadian solidago, and aster bifida biochar, the combination of bidens triphylla biochar, canadian solidago, and bidens biochar, the combination of bidens triphylla, canadian solidago, and sesbania biochar, a combination of bidens tripartita biochar, aster bifidus biochar and bidens pilosa biochar, a combination of bidens tripartita biochar, aster bifidus biochar and sesbania biochar, a combination of bidens triphylla biochar, bidens pilosa biochar, a combination of solidago canadensis biochar, solidago canadensis and aster bifidus biochar, a combination of solidago canadensis, solidago canadensis and bidens pilosa biochar, a combination of solidago minutissima, solidago canadensis and sesbania biochar, a combination of solidago minutissimalis, aster bifidus biochar and bidens pilosula, a combination of solidago minutissima, aster bifidus biochar and sesbania biochar, a combination of solidago triphylla biochar, and sesbania biochar, a combination of solidago triphylla and sesbania biochar, a combination of solidago canadensis, a aster biochar and bidens, a combination of canadian solidago peanut charcoal, aster scabra biochar and sesbania biochar, a combination of canadian solidago peanut charcoal, bidens pilosa biochar and sesbania biochar, and a combination of aster scabra biochar, bidens pilosa biochar and sesbania biochar.
The biochar may also be selected from four of bidens tripartita biochar, horseweed herb biochar, solidago canadensis biochar, aster bifida biochar, sticktight biochar, and sesbania biochar, such as the combination of bidens tripartita biochar, horseweed biochar, solidago canadensis biochar, and aster bifidus biochar, the combination of bidens triphylla biochar, solidago canadensis biochar, and sticktight biochar, the combination of bidens triphylla biochar, horseweed biochar, solidago canadensis, and aster bifidus biochar, the combination of bidens triphylla biochar, horseweed biochar, aster bifidus biochar, and bidens bipinna biochar, the combination of bidens tripartita biochar, horseweed biochar, aster trifoliata biochar and aster bifoliata biochar, bidens triphylla biochar, horseweed bipinnata biochar and aster bifoliata biochar, bidens triphylla biochar, solidago canadensis biochar, aster bifoliata biochar and bidens triphylla biochar, solidago canadensis biochar and aster bifoliata biochar, bidens canadensis biochar, bidens triphylla biochar and aster bifolia biochar, bidens triphylla biochar, aster bifolia biochar, bidens triphylla biochar and aster bifolia biochar, and the like.
The biochar can also be selected from five of bidens tripartita biochar, horseweed herb biochar, solidago canadensis biochar, aster bifida biochar, bidens triphylla biochar and sesbania biochar, bidens triphylla biochar, solidago canadensis biochar, aster biflora biochar and sesbania biochar, the combination of bidens tripartita biochar, horseweed biochar, aster rhynchophylla biochar, bidens triphylla biochar and sesbania biochar, the combination of bidens triphylla biochar, horseweed biochar, solidago canadensis biochar, aster rhynchophylla biochar and sesbania biochar, the combination of bidens triphylla biochar, solidago canadensis biochar, aster rhynchophylla biochar and bidens triphylla biochar. The biochar can also be selected from six of bidens tripartita biochar, horseweed biochar, solidago canadensis biochar, aster rhynchophylla biochar, bidens pilosa biochar, and sesbania biochar.
The mass ratio of each component in the biochar is not particularly limited. In order to further improve the cadmium reduction effect, the addition amount of the other components is preferably 0.5 to 2 parts by mass based on 1 part by mass of one component in the biochar. Illustratively, when the biochar only contains the bidens tripartita biochar, the horseweed biochar, the solidago canadensis biochar and the aster rigescens biochar, the content of the horseweed biochar is 0.5-2 parts by mass, the content of the solidago canadensis biochar is 0.5-2 parts by mass and the content of the aster rigescens biochar is 0.5-2 parts by mass based on 1 part by mass of the bidens tripartita biochar.
In the research process, the inventor finds that the biochar is limited to at least two selected from the group consisting of bidens tripartita biochar, horseweed biochar, solidago canadensis biochar, aster rigidus biochar, bidens pilosa biochar and sesbania biochar, and the cadmium reduction capability of the biochar can be effectively improved through the interaction between the at least two biochar, so that the remediation effect of cadmium-polluted soil can be further promoted.
In order to be able to further enhance the cadmium reduction effect of the biochar, preferably, the biochar is selected from at least three of bidens tripartita biochar, horseweed biochar, solidago canadensis, aster rhynchophylla biochar, bidens pilosa biochar, and sesbania biochar. From the viewpoint of further improving the cadmium reducing effect of the biochar, preferably, the biochar is selected from three of bidens tripartita biochar, horseweed biochar, solidago canadensis biochar, aster rigescens biochar, bidens pilosa biochar, and sesbania biochar.
Preferably, the biochar is solidago canadensis biochar, bidens pilosa biochar, and sesbania biochar. Research shows that the cadmium reduction effect of the biochar can be greatly improved by adopting the combination of the solidago canadensis biochar, the bidens pilosa biochar and the sesbania biochar.
The mass ratio of the solidago canadensis, the bidens pilosa and the sesbania is not particularly limited, and illustratively, the mass ratio of the solidago canadensis, the bidens pilosa and the sesbania may be 1.1 to 10. But in order to further improve the cadmium reduction effect of the biochar, the mass ratio of the solidago canadensis to the bidens is preferably 1.5-2. From the viewpoint of further improving the cadmium reduction effect of the biochar, it is further preferable that the mass ratio of the bidens pilosa to the sesbania be 1.
The invention provides a preparation method of biochar for promoting cadmium-contaminated soil remediation, which comprises the following steps: pretreating and calcining the raw materials, and mixing to obtain the biochar for promoting the remediation of the cadmium-polluted soil; the raw materials are at least two selected from the group consisting of bidens tripartita, horseweed herb, solidago canadensis, aster scabra, bidens pilosa and sesbania.
Specifically, the calcination is carried out under oxygen-exclusion conditions. The oxygen isolation condition is provided by inert gas atmosphere, which can be nitrogen atmosphere, argon atmosphere, helium atmosphere, etc.
Wherein the bidens bipartita (Bidens frondosa L.) is an annual herb belonging to Bidens bipinnata of Compositae of Dicotyledoneae of angiospermae. Erigeron breviscapus (Conyza canadensis (L.) Cronq.) is an annual herb belonging to the genus Brettanomyces of the order Campanulales of the phylum Aristolochiae of the family Astera. Solidago canadensis L.is a plant of the family Asteraceae of the order Campanulales. Aster rhynchophylla (Symphytrichumsullatum (Michx.) G.L.Nesom) is an Aster genus belonging to Aster family of Asteraceae family of Hydrangeaceae family of Hymenomycetes class of Heterophyllales phylum. Bidenstiloba L.is an annual herb belonging to the genus Bidens of Compositae of the order Chrysanthemum of the order Dicotyledoneae of the order angiospermae. Sesbania (Sesbania cannabibina (retz.) poir.) is an annual herb belonging to the genus Sesbania of the family robinia of the subfamily Papilionaceae of the order Rosales of the order Dicotyledoneae of the phylum angiospermae.
The inventor finds that the raw materials are limited to at least two of bidens tripartita, horseweed herb, solidago canadensis, aster rhineophyllum, bidens pilosa and sesbania in the research process, and the biochar obtained by mixing after calcination has high cadmium reduction capability and has good remediation effect when being used for remediation of cadmium-contaminated soil.
The pretreatment may be carried out by a conventional pretreatment means such as drying, crushing, etc. Preferably, the step of pre-treating comprises: drying the raw materials and crushing the dried raw materials into particles. The raw materials are dried and crushed into particles, so that the carbonization effect of the raw materials can be improved, and the cadmium reduction effect of the biochar is further improved. The drying mode can be a drying mode conventionally used in the field, such as drying, drying in the shade, drying in the sun and the like. Preferably by drying.
The calcination may be carried out in a muffle furnace or a tube furnace. The temperature and time of the calcination can be determined by those skilled in the art as the case may be. In order to further improve the cadmium reduction effect of the prepared biochar, the calcining temperature is preferably 400-500 ℃, and specifically can be 400 ℃, 450 ℃, 500 ℃ or any value between the two values. The calcination time is 1-3h, and specifically may be 1h, 1.5h, 2h, 2.5h, 3h, or any value between the two values. The calcination time is a time for which the temperature is maintained at the calcination temperature. The heating rate for heating the temperature to the calcining temperature is 5-15 ℃/min. As one embodiment of the present invention, the temperature increase rate for increasing the temperature to the calcination temperature is 10 ℃/min.
In order to be able to further enhance the cadmium reduction effect of the produced biochar, it is preferable that the raw material is selected from at least three of bidens tripartita, horseweed herb, solidago canadensis, aster scabra, bidens pilosa, and sesbania. From the viewpoint of further improving the cadmium reducing effect of the produced biochar, it is further preferable that the raw material is selected from three of bidens tripartita, horseweed herb, solidago canadensis, aster rhynchophylla, bidens pilosa, and sesbania sessilifolia.
More preferably, the feedstock is solidago canadensis, bidens pilosa, and sesbania. The biochar prepared by the raw materials has a better cadmium reduction effect.
In order to further improve the cadmium reduction effect of the prepared biochar, the mixing mass ratio of the solidago canadensis, the bidens pilosa and the sesbania after calcination is further preferably 1.5-2. From the viewpoint of further improving the cadmium reduction effect of the produced biochar, it is further preferable that the mixing mass ratio of the bidens pilosa to the sesbania after calcination is 1.
The preparation method also comprises the step of sieving the prepared biochar. Preferably, the particle size of the biochar subjected to sieving treatment is less than or equal to 0.15mm.
The third aspect of the invention provides the biochar for promoting the remediation of the cadmium-contaminated soil in the first aspect and/or the application of the biochar prepared by the preparation method in the second aspect in reducing the cadmium content in the soil. The biochar can effectively reduce the cadmium content of soil, thereby promoting the remediation of the cadmium-polluted soil.
According to a particularly preferred embodiment of the invention, solidago canadensis, sticktight and sesbania are respectively dried at a temperature of 50-80 ℃ for 24-72h, and after being respectively crushed, particles with a particle size of less than 0.18mm are collected, and then are respectively heated in a muffle furnace at a heating rate of 5-15 ℃/min to 400-500 ℃ and kept at the temperature for 1-3h, so that solidago canadensis biochar, sticktight and sesbania biochar are obtained, and then solidago canadensis, solidago trifoliate and sesbania biochar are mixed according to a mass ratio of 1.
The biochar prepared by the method has a better cadmium reduction effect, and can effectively promote the remediation of cadmium-polluted soil.
The present invention will be described in detail below by way of examples. In the following examples, bidens tripartita, horseweed herb, solidago canadensis, aster prodigiosus, bidens pilosa and sesbania are all collected from the Zanthojiang area of Taizhou city, zhejiang province.
Example 1
(1) Respectively drying solidago canadensis, bidens pilosa and sesbania for 48h at the temperature of 70 ℃, respectively crushing and collecting particles with the particle size of less than 0.18mm to obtain solidago canadensis raw material, bidens pilosa raw material and sesbania raw material;
(2) Respectively heating a solidago canadensis raw material, a bidens pilosa raw material and a sesbania raw material to 450 ℃ in a muffle furnace at a heating rate of 10 ℃/min, and keeping the temperature for 2 hours to obtain solidago canadensis charcoal, bidens pilosa charcoal and sesbania charcoal;
(3) Mixing canadian goldenrod peanut charcoal, bidens pilosa biochar and sesbania biochar according to a mass ratio of 1.
Example 2
(1) Respectively drying solidago canadensis, bidens pilosa and sesbania for 72h at the temperature of 50 ℃, respectively crushing and collecting particles with the particle size of less than 0.18mm to obtain solidago canadensis raw material, bidens pilosa raw material and sesbania raw material;
(2) Respectively heating a solidago canadensis raw material, a bidens pilosa raw material and a sesbania raw material to 400 ℃ in a muffle furnace at the heating rate of 5 ℃/min, and keeping the temperature for 3 hours to obtain solidago canadensis charcoal, bidens pilosa charcoal and sesbania charcoal;
(3) Mixing the solidago canadensis biochar, the bidens pilosa biochar and the sesbania biochar according to the mass ratio of 1:0.5 to obtain biochar for promoting the cadmium-polluted soil remediation, and then sieving to collect biochar particles with the particle size of less than or equal to 0.15mm.
Example 3
(1) Respectively drying solidago canadensis, bidens pilosa and sesbania for 24h at the temperature of 80 ℃, respectively crushing and collecting particles with the particle size of less than 0.18mm to obtain solidago canadensis raw material, bidens pilosa raw material and sesbania raw material;
(2) Respectively heating a solidago canadensis raw material, a bidens pilosa raw material and a sesbania raw material to 500 ℃ in a muffle furnace at a heating rate of 15 ℃/min, and keeping the temperature for 1h to obtain solidago canadensis charcoal, bidens pilosa charcoal and sesbania charcoal;
(3) Mixing the solidago canadensis charcoal, the bidens pilosa charcoal and the sesbania charcoal according to a mass ratio of 1.
Example 4
Preparing canadian goldenrod herb charcoal, bidens pilosa biochar, and sesbania biochar according to the method described in example 2;
mixing canadian solidago arenaria charcoal, bidens pilosa charcoal and sesbania charcoal according to a mass ratio of 1.5.
Example 5
Preparing canadian goldenrod herb charcoal, bidens pilosa biochar, and sesbania biochar according to the method described in example 3;
mixing canadian goldenrod peanut charcoal, bidens pilosa biochar and sesbania biochar according to a mass ratio of 1.
Example 6
Preparing canadian goldenrod herb charcoal, bidens pilosa biochar, and sesbania biochar according to the method described in example 3;
mixing the solidago canadensis biochar, the bidens pilosa biochar and the sesbania biochar according to the mass ratio of 1.
Example 7
(1) Respectively drying solidago canadensis, bidens pilosa and bidens bipinnata at 50 ℃ for 72h, respectively crushing, and collecting particles with the particle size of less than 0.18mm to obtain solidago canadensis raw material, bidens pilosa raw material and bidens bipinnata raw material;
(2) Respectively heating the solidago canadensis raw material, the bidens triphylla raw material and the bidens tripartita raw material to 400 ℃ in a muffle furnace at the heating rate of 5 ℃/min, and keeping the temperature for 3 hours to obtain solidago canadensis charcoal, bidens triphylla biochar and bidens triphylla biochar;
(3) Mixing canadian solidago peanut charcoal, bidens pilosa charcoal and bidens bipinnata charcoal according to a mass ratio of 1:0.5 to obtain charcoal for promoting cadmium contaminated soil remediation, and then sieving and collecting charcoal particles with the particle size of less than or equal to 0.15mm.
Example 8
(1) Respectively drying the bidens tripartita, the bidens pilosa and the sesbania at the temperature of 80 ℃ for 24 hours, respectively crushing the components, and then collecting particles with the particle size of less than 0.18mm to obtain a bidens bipinnata raw material, a bidens pilosa raw material and a sesbania raw material;
(2) Heating the bidens tripartita raw material, the bidens pilosa raw material and the sesbania raw material in a muffle furnace at a heating rate of 15 ℃/min to 500 ℃ respectively, and keeping the temperature for 1h to obtain bidens tripartita biochar, bidens pilosa biochar and sesbania biochar;
(3) Mixing the bidens tripartita biochar, the bidens pilosa biochar and the sesbania biochar according to a mass ratio of 1.
Example 9
(1) Drying herba Erigerontis, herba Bidentis Bipinnatae and herba Bidentis Tripartitae at 50 deg.C for 72 hr, respectively crushing, and collecting particles with particle diameter less than 0.18mm to obtain herba Erigerontis raw material, herba Bidentis Bipinnatae raw material and herba Bidentis Tripartitae raw material;
(2) Respectively heating the erigeron breviscapus raw material, the bidens pilosa raw material and the bidens tripartita raw material to 400 ℃ in a muffle furnace at the heating rate of 5 ℃/min, and keeping the temperature for 3 hours to obtain erigeron breviscapus biochar, the bidens triphylla biochar and the bidens triphylla biochar;
(3) Mixing the erigeron breviscapus biochar, the bidens pilosa biochar and the bidens tripartita biochar according to a mass ratio of 1:0.5 to obtain biochar for promoting the remediation of the cadmium-contaminated soil, and then sieving and collecting biochar particles with the particle size of less than or equal to 0.15mm.
Example 10
(1) Respectively drying the bidens tripartita, the aster crenata and the sesbania at the temperature of 80 ℃ for 24h, respectively crushing the components, and collecting particles with the particle size of less than 0.18mm to obtain a bidens tripartita raw material, a aster crenata raw material and a sesbania raw material;
(2) Heating the bidens tripartita raw material, the aster rhynchophylla raw material and the sesbania raw material in a muffle furnace at a heating rate of 15 ℃/min to 500 ℃ respectively, and keeping the temperature for 1h to obtain bidens triphylla biochar, aster rhynchophylla biochar and sesbania biochar;
(3) Mixing the bidens tripartita biochar, the aster rigescens biochar and the sesbania biochar according to a mass ratio of 1.
Example 11
(1) Respectively drying the bidens tripartita, the solidago canadensis, the bidens pilosa and the sesbania for 72 hours at the temperature of 50 ℃, respectively crushing the materials, and collecting particles with the particle size of less than 0.18mm to obtain a bidens tripartita raw material, a solidago canadensis raw material, a bidens pilosa raw material and a sesbania raw material;
(2) Heating the raw materials of the bidens tripartita, the canadian goldenrod herb, the bidens pilosa and the sesbania in a muffle furnace at the heating rate of 5 ℃/min to 400 ℃ respectively, and keeping the temperature for 3 hours to obtain the biochar of the bidens tripartita, the canadian goldenrod herb, the bidens pilosa and the sesbania;
(3) Mixing the bidens tripartita biochar, the canadian solidago virginiana biochar, the bidens pilosa biochar and the sesbania biochar according to a mass ratio of 1.
Example 12
(1) Respectively drying Canadian goldenrod herb, horseweed herb, bidens pilosa and sesbania for 24h at the temperature of 80 ℃, respectively crushing, and collecting particles with the particle size of less than 0.18mm to obtain a Canadian goldenrod herb raw material, a horseweed herb raw material, a bidens pilosa raw material and a sesbania raw material;
(2) Respectively heating a solidago canadensis raw material, a horseweed raw material, a bidens pilosa raw material and a sesbania raw material to 500 ℃ in a muffle furnace at a heating rate of 15 ℃/min, and keeping the temperature for 1h to obtain solidago canadensis charcoal, horseweed charcoal, bidens pilosa charcoal and sesbania charcoal;
(3) Mixing canadian goldenrod peanut charcoal, horseweed herb charcoal, bidens pilosa charcoal and sesbania charcoal according to a mass ratio of 1.
Example 13
(1) Respectively drying the bidens tripartita, the horseweed herb, the solidago canadensis, the aster bifoliata, the bidens triphylla and the sesbania for 72 hours at the temperature of 50 ℃, respectively crushing and collecting particles with the particle size of less than 0.18mm to obtain a bidens triphylla raw material, a horseweed herb raw material, a solidago canadensis raw material, a aster bifoliata raw material, a bidens triphylla raw material and a sesbania raw material;
(2) Heating a bidens tripartita raw material, a horseweed raw material, a solidago canadensis raw material, a aster trifoliata raw material, a bidens pilosa raw material and a sesbania raw material in a muffle furnace at a heating rate of 5 ℃/min to 400 ℃, and keeping the temperature for 3 hours to obtain a bidens triphylla biochar, a horseweed microula biochar, a solidago canadensis biochar, a aster trifoliata biochar, a bidens pilosa biochar and a sesbania biochar;
(3) Mixing the bidens bipinnata biochar, the horseweed biochar, the solidago canadensis biochar, the aster scabra biochar, the bidens pilosa biochar and the sesbania biochar according to a mass ratio of 1.
Example 14
(1) Respectively drying solidago canadensis and bidens pilosa at the temperature of 50 ℃ for 72h, respectively crushing, and collecting particles with the particle size of less than 0.18mm to obtain solidago canadensis raw material and bidens pilosa raw material;
(2) Respectively heating the solidago canadensis raw material and the bidens pilosa raw material to 400 ℃ in a muffle furnace at the heating rate of 5 ℃/min, and keeping the temperature for 3 hours to obtain solidago canadensis charcoal and bidens pilosa charcoal;
(3) Mixing the canadian solidago virginiana charcoal and the bidens pilosa charcoal according to the mass ratio of 1.
Example 15
(1) Drying herba Bidentis Bipinnatae and herba Setariae Japonicae at 80 deg.C for 24 hr, respectively crushing, and collecting particles with particle diameter less than 0.18mm to obtain herba Bidentis Bipinnatae raw material and herba Setariae Japonicae raw material;
(2) Heating the bidens pilosa raw material and the sesbania raw material in a muffle furnace at a heating rate of 15 ℃/min to 500 ℃ respectively, and keeping the temperature for 1h to obtain bidens pilosa biochar and sesbania biochar;
(3) Mixing the bidens pilosa biochar and the sesbania biochar according to the mass ratio of 2:1 to obtain biochar for promoting cadmium-polluted soil remediation, and then sieving and collecting biochar particles with the particle size of less than or equal to 0.15mm.
Example 16
(1) Respectively drying Canadian goldenrod herb and sesbania at 50 ℃ for 72h, respectively crushing, and collecting particles with the particle size of less than 0.18mm to obtain Canadian goldenrod herb raw materials and sesbania raw materials;
(2) Respectively heating a solidago canadensis raw material and a sesbania raw material to 400 ℃ in a muffle furnace at a heating rate of 5 ℃/min, and keeping the temperature for 3 hours to obtain solidago canadensis charcoal and sesbania biochar;
(3) Mixing the solidago canadensis charcoal and sesbania biochar according to the mass ratio of 1:1 to obtain biochar for promoting cadmium-polluted soil remediation, and then sieving and collecting biochar particles with the particle size of less than or equal to 0.15mm.
Comparative example 1
Drying the bidens bipinnata at the temperature of 50 ℃ for 72h, crushing, collecting particles with the particle size of less than 0.18mm, heating to 400 ℃ in a muffle furnace at the heating rate of 5 ℃/min, keeping the temperature for 3h to obtain biochar, and sieving to collect biochar particles with the particle size of less than or equal to 0.15mm.
Comparative example 2
Drying erigeron breviscapus for 72h at the temperature of 50 ℃, crushing, collecting particles with the particle size of less than 0.18mm, heating to 400 ℃ in a muffle furnace at the heating rate of 5 ℃/min, keeping the temperature for 3h to obtain biochar, and sieving to collect biochar particles with the particle size of less than or equal to 0.15mm.
Comparative example 3
Drying solidago canadensis at 50 ℃ for 72h, crushing, collecting particles with the particle size of less than 0.18mm, heating to 400 ℃ in a muffle furnace at the heating rate of 5 ℃/min, keeping the temperature for 3h to obtain biochar, and sieving to collect biochar particles with the particle size of less than or equal to 0.15mm.
Comparative example 4
Drying Aster rhynchophylla at 50 ℃ for 72h, crushing, collecting particles with the particle size of less than 0.18mm, heating to 400 ℃ in a muffle furnace at the heating rate of 5 ℃/min, keeping the temperature for 3h to obtain biochar, and sieving to collect biochar particles with the particle size of less than or equal to 0.15mm.
Comparative example 5
Drying herba Bidentis Bipinnatae at 50 deg.C for 72h, crushing, collecting granules with particle size less than 0.18mm, heating to 400 deg.C in muffle furnace at a heating rate of 5 deg.C/min, maintaining at the temperature for 3h to obtain biochar, and sieving to collect biochar granules with particle size less than or equal to 0.15mm.
Comparative example 6
Drying sesbania at 50 ℃ for 72h, crushing, collecting particles with the particle size of less than 0.18mm, heating to 400 ℃ in a muffle furnace at the heating rate of 5 ℃/min, keeping the temperature for 3h to obtain biochar, and sieving to collect biochar particles with the particle size of less than or equal to 0.15mm.
Test example 1
A native plant community is constructed, and the community consists of 4 kinds of herbaceous plants, namely arthraxon hispidus (Thunb.) Makino, bermuda grass (Cynodondylan (L.) Pers.), plantago asiatica (Plantago asiatica L.) and astragalus sinicus (Astragalus L.), which are common herbaceous plants in China. Seeds of these 4 species were sown in pots (30 cm long by 30 cm wide by 30 cm deep) filled with a 1:1 (v/v) mixture of river sand and peat in a greenhouse maintained at 25 ℃ and 80% relative humidity (measured using a humidity/temperature data logger UNI-T UT 330B). After four weeks, seedlings of similar size were selected for each species and used for transplantation.
Potting experiments were performed in the same greenhouse. Book (I)The experiment required a total of 23X 5 pots (3L), each filled with a 1:1 (v/v) mixture of local mountain soil and river sand. Local soil is collected from high mountain soil around Taizhou of Zhejiang province, the total nitrogen content of the soil is 0.39 +/-0.01 (average +/-SE) g/kg, and the total phosphorus content of the soil is 0.64 +/-0.04 g/kg. In order to simulate cadmium (Cd) polluted soil, 10mg/kg of Cd is added into the soil of each flowerpot 2+ The Cd source is CdCl 2 Watering and stirring every day to ensure that Cd is uniformly distributed in the soil.
The flowerpots are divided into an example 1 treatment group, an example 2 treatment group, a … … treatment group, an example 16 treatment group, a comparative example 1 treatment group, … …, a comparative example 6 treatment group and a blank control group, wherein each group comprises 5 samples, each sample is added with 30g of biochar corresponding to the example or the comparative example, the blank control group does not need to be added with the biochar, and 8 seedlings, including 2 seedlings of four native plants, are planted in 115 flowerpots after one week of adding. Within the first two weeks after transplantation, each plant was checked for survival and immediately replaced with a dead individual. All pots were watered every two days. No fertilizer was applied during the entire test period.
After four months of growth, the above-ground parts of each plant were harvested separately in each pot. The roots of different species are harvested as a whole because they are interwoven with each other. The aerial parts and root systems are dried at 70 ℃ for at least 48 hours and weighed. The weighed samples of aerial parts and root system were ground to a fine powder and stored for total Cd measurement. The aerial parts are mixed together to meet the materials required for chemical analysis. One mixed soil sample was collected from each pot, sieved (2 mm size screen), air dried, and prepared for Cd analysis.
And (3) testing the effective Cd in the soil by a DTPA leaching method: weighing 10g of air-dried soil sieved by a 20-mesh sieve, adding 20mL of DTPA leaching liquor, performing shaking leaching for 2h, immediately filtering to obtain filtrate, and performing measurement on the filtrate within 48h by using an inductively coupled plasma emission spectrometer (Optima 2100DV, perkin Elmer).
Determination of Cd content in plants: 0.5g of a plant sample sieved through a 100 mesh sieve was weighed, digested with a mixture of sulfuric acid and perchloric acid (concentrated sulfuric acid and perchloric acid in a volume ratio of 5:1), and then subjected to measurement using an inductively coupled plasma emission spectrometer (Optima 2100dv, perkin Elmer).
The measured parameters were counted and the average values are reported in table 1.
TABLE 1
As can be seen from the results in Table 1, the cadmium content in the soil treated by the biochar of examples 1-16 is far lower than that of the soil treated by the biochar of comparative examples 1-6, and the cadmium content in the plants planted in the soil treated by the biochar of examples 1-16 is far lower than that of the plants planted in the soil treated by the biochar of comparative examples 1-6, which shows that the components in the biochar within the protection scope of the present invention can interact with each other, so that the effective cadmium content in the soil and the cadmium content in the plants planted in the soil can be effectively reduced, and therefore, the cadmium reduction effect is better.
The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention, including combinations of various technical features in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the invention, and all fall within the scope of the invention.
Claims (10)
1. The biochar for promoting cadmium-contaminated soil remediation is characterized in that the biochar is selected from at least two of bidens tripartita biochar, horseweed biochar, solidago canadensis biochar, aster rigidus biochar, bidens pilosa biochar and sesbania biochar.
2. The biochar for promoting cadmium contaminated soil remediation according to claim 1 wherein said biochar is selected from at least three of burclover biochar, horseweed biochar, solidago canadensis biochar, aster rhynchophylla biochar, bidens pilosa biochar, and sesbania biochar.
3. The biochar for promoting cadmium contaminated soil remediation according to claim 2 wherein said biochar is selected from three of the group consisting of bidens tripartita biochar, horseweed biochar, solidago canadensis biochar, aster rhinis biochar, bidens pilosa biochar, and sesbania biochar.
4. The biochar for promoting cadmium contaminated soil remediation according to claim 3 wherein said biochar is canadian solidago virginiana biochar, bidens pilosa biochar, and sesbania biochar;
preferably, the mass ratio of the canadian solidago virginiana charcoal to the bidens pilosa charcoal to the sesbania charcoal is 1;
preferably, the mass ratio of the bidens pilosa biochar to the sesbania biological carbon is 1.
5. A preparation method of biochar for promoting cadmium-contaminated soil remediation is characterized by comprising the following steps: pretreating and calcining the raw materials, and mixing to obtain the biochar for promoting the remediation of the cadmium-polluted soil;
the raw materials are at least two selected from the group consisting of bidens tripartita, horseweed herb, solidago canadensis, aster scabra, bidens pilosa and sesbania.
6. The method according to claim 5, wherein the raw material is selected from at least three of pennisetum japonicum, horseweed herb, solidago canadensis, aster scabra, bidens pilosa and sesbania;
preferably, the raw material is selected from three of bidens tripartita, horseweed herb, solidago canadensis, aster scabra, bidens pilosa and sesbania.
7. The production method according to claim 6, wherein the starting materials are Solidago canadensis, bidens pilosa and sesbania;
preferably, the mixing mass ratio of the solidago canadensis, the bidens pilosa and the sesbania after calcination is 1;
preferably, the mixing mass ratio of the bidens pilosa to the sesbania after calcination is 1.
8. The method for preparing according to any one of claims 5 to 7, wherein the step of pre-treating comprises: drying the raw materials and crushing the dried raw materials into particles.
9. The method according to any one of claims 5 to 7, wherein the calcination conditions include: the temperature is 400-500 ℃ and the time is 1-3h.
10. Use of the biochar for promoting cadmium-contaminated soil remediation according to any one of claims 1-4 and/or the biochar prepared by the preparation method according to any one of claims 5-9 for reducing the cadmium content of soil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211021334.8A CN115449372A (en) | 2022-08-24 | 2022-08-24 | Biochar for promoting cadmium-polluted soil remediation and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211021334.8A CN115449372A (en) | 2022-08-24 | 2022-08-24 | Biochar for promoting cadmium-polluted soil remediation and preparation method and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115449372A true CN115449372A (en) | 2022-12-09 |
Family
ID=84298379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211021334.8A Pending CN115449372A (en) | 2022-08-24 | 2022-08-24 | Biochar for promoting cadmium-polluted soil remediation and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115449372A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109261125A (en) * | 2018-11-30 | 2019-01-25 | 湖南农业大学 | A kind of Solidago Canadensis stalk charcoal, preparation method and its in removal washes LAS application |
| CN109482632A (en) * | 2018-12-29 | 2019-03-19 | 广西壮族自治区农业科学院农产品质量安全与检测技术研究所 | A method of utilizing brill leaf aster cadmium pollution soil repair and sludge |
| CN109848206A (en) * | 2019-02-25 | 2019-06-07 | 中国科学院南京土壤研究所 | Big application of the bur beggar-ticks in restoration of soil polluted by heavy metal |
| CN110813231A (en) * | 2019-10-22 | 2020-02-21 | 华南农业大学 | Method for restoring Cd and Cu pollution by using biochar prepared from invasive plant Bidens pilosa |
| CN110877046A (en) * | 2019-11-29 | 2020-03-13 | 西南科技大学 | Passivation remediation method for uranium-cadmium composite contaminated soil |
| CN113145636A (en) * | 2021-04-02 | 2021-07-23 | 中国科学院水生生物研究所 | Biochar material for immobilizing soil heavy metal cadmium and method for repairing heavy metal contaminated soil by biochar material |
-
2022
- 2022-08-24 CN CN202211021334.8A patent/CN115449372A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109261125A (en) * | 2018-11-30 | 2019-01-25 | 湖南农业大学 | A kind of Solidago Canadensis stalk charcoal, preparation method and its in removal washes LAS application |
| CN109482632A (en) * | 2018-12-29 | 2019-03-19 | 广西壮族自治区农业科学院农产品质量安全与检测技术研究所 | A method of utilizing brill leaf aster cadmium pollution soil repair and sludge |
| CN109848206A (en) * | 2019-02-25 | 2019-06-07 | 中国科学院南京土壤研究所 | Big application of the bur beggar-ticks in restoration of soil polluted by heavy metal |
| CN110813231A (en) * | 2019-10-22 | 2020-02-21 | 华南农业大学 | Method for restoring Cd and Cu pollution by using biochar prepared from invasive plant Bidens pilosa |
| CN110877046A (en) * | 2019-11-29 | 2020-03-13 | 西南科技大学 | Passivation remediation method for uranium-cadmium composite contaminated soil |
| CN113145636A (en) * | 2021-04-02 | 2021-07-23 | 中国科学院水生生物研究所 | Biochar material for immobilizing soil heavy metal cadmium and method for repairing heavy metal contaminated soil by biochar material |
Non-Patent Citations (1)
| Title |
|---|
| 汤嘉雯等: "加拿大一枝黄花生物炭对Cd2+的吸附特性及机理", 《农业环境科学学报》, vol. 38, no. 6, 30 June 2019 (2019-06-30), pages 1339 - 1348 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107115840B (en) | Carbon-based composite material for repairing arsenic-cadmium contaminated soil and application thereof | |
| CN113072947B (en) | Stable repairing agent for improving heavy metal soil and preparation method and application thereof | |
| CN111468078B (en) | Reed stalk biochar composite material and application thereof in repairing cadmium-polluted soil | |
| CN107470334B (en) | Compound repairing agent for cleaning petroleum-polluted soil | |
| Peng et al. | Cadmium and other metal uptake by Lobelia chinensis and Solanum nigrum from contaminated soils | |
| CN110452067A (en) | A kind of charcoal and its method for repairing karst mine soil | |
| CN110624948A (en) | Method for restoring cadmium-polluted soil by combining biochar and plants | |
| CN109794498B (en) | Method for repairing petroleum-polluted soil by rhamnolipid modified charcoal reinforced cord grass | |
| CN102715082B (en) | Efficient arsenic-absorbed ecological ciliate desert-grass screening method | |
| CN105638193B (en) | One kind planting tobacco in difenoconazole contaminated soil and reduces its remaining method | |
| CN113042001A (en) | Porous biochar for improving severe pollution and preparation method thereof | |
| CN101337231A (en) | Method for promoting lawn absorb heavy metal from consumer garbage compost and increasing photosynthesis amount cooperated with angleworm | |
| CN1281346C (en) | Plant restoring method of lead polluted soil | |
| CN108817077A (en) | A method of utilizing super enriching plant Tephrosia candida remediating lead-contaminated soil | |
| CN110373196B (en) | Tobacco planting soil nano cadmium passivator and preparation method and application thereof | |
| CN102989757B (en) | Method for remedying stannum contaminated soil and shallow water body by using arundinella anomala plants | |
| CN115449372A (en) | Biochar for promoting cadmium-polluted soil remediation and preparation method and application thereof | |
| CN116493405A (en) | Method for repairing tailings by combining blue algae-moss crust and biochar-semi-carbonized sludge modifier | |
| CN110129063A (en) | A kind of composite material suitable for heavy-metal composite pollution farmland safe utilization | |
| CN112521952B (en) | Soil passivation microcapsule and method for resource utilization of titanium gypsum | |
| CN111057554B (en) | Granular agent for restoring Cd and Pb polluted, acidified and salinized soil of vegetables, and preparation method and application thereof | |
| Hemowng et al. | Rice-derived biochars enhance the yield of spring onion (Allium cepa l. var. aggregatum), while reducing pesticide contamination in soil and plant | |
| CN107032935A (en) | Attapulgite-based trace element soil conditioner and preparation method thereof | |
| CN110791293A (en) | Rice field heavy metal cadmium passivator and preparation method thereof | |
| CN118064153A (en) | Preparation and application of lead-cadmium composite contaminated soil restoration material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |