CN109678626B - Soil conditioner for mercury-polluted farmland remediation and preparation method and application thereof - Google Patents
Soil conditioner for mercury-polluted farmland remediation and preparation method and application thereof Download PDFInfo
- Publication number
- CN109678626B CN109678626B CN201910080369.0A CN201910080369A CN109678626B CN 109678626 B CN109678626 B CN 109678626B CN 201910080369 A CN201910080369 A CN 201910080369A CN 109678626 B CN109678626 B CN 109678626B
- Authority
- CN
- China
- Prior art keywords
- magnesium
- carbon
- soil
- mercury
- soil conditioner
- 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.)
- Expired - Fee Related
Links
- 239000003516 soil conditioner Substances 0.000 title claims abstract description 58
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 238000005067 remediation Methods 0.000 title abstract description 17
- 241000209094 Oryza Species 0.000 claims abstract description 118
- 235000007164 Oryza sativa Nutrition 0.000 claims abstract description 118
- 235000009566 rice Nutrition 0.000 claims abstract description 118
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 104
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 104
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 99
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 99
- 239000011777 magnesium Substances 0.000 claims abstract description 99
- 239000002689 soil Substances 0.000 claims abstract description 78
- CKMXBZGNNVIXHC-UHFFFAOYSA-L ammonium magnesium phosphate hexahydrate Chemical compound [NH4+].O.O.O.O.O.O.[Mg+2].[O-]P([O-])([O-])=O CKMXBZGNNVIXHC-UHFFFAOYSA-L 0.000 claims abstract description 46
- 229910052567 struvite Inorganic materials 0.000 claims abstract description 46
- 239000010866 blackwater Substances 0.000 claims abstract description 44
- 239000003337 fertilizer Substances 0.000 claims abstract description 24
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 claims abstract description 23
- KMQAPZBMEMMKSS-UHFFFAOYSA-K calcium;magnesium;phosphate Chemical compound [Mg+2].[Ca+2].[O-]P([O-])([O-])=O KMQAPZBMEMMKSS-UHFFFAOYSA-K 0.000 claims abstract description 23
- 239000004021 humic acid Substances 0.000 claims abstract description 23
- 238000002156 mixing Methods 0.000 claims abstract description 22
- 239000010903 husk Substances 0.000 claims description 56
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 48
- 229910052753 mercury Inorganic materials 0.000 claims description 47
- 238000000034 method Methods 0.000 claims description 19
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 239000010865 sewage Substances 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 9
- 239000003610 charcoal Substances 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 239000002244 precipitate Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 229910001629 magnesium chloride Inorganic materials 0.000 claims description 7
- 239000000047 product Substances 0.000 claims description 6
- 230000002550 fecal effect Effects 0.000 claims description 5
- 238000000967 suction filtration Methods 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 3
- 238000010304 firing Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 2
- 238000002386 leaching Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 14
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 13
- 238000012360 testing method Methods 0.000 description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 230000009467 reduction Effects 0.000 description 7
- 238000011282 treatment Methods 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- 238000005065 mining Methods 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 229910052698 phosphorus Inorganic materials 0.000 description 4
- 239000011574 phosphorus Substances 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 238000012258 culturing Methods 0.000 description 3
- 230000036541 health Effects 0.000 description 3
- 235000015097 nutrients Nutrition 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- 231100000419 toxicity Toxicity 0.000 description 3
- 230000001988 toxicity Effects 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 210000003608 fece Anatomy 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 229910017958 MgNH Inorganic materials 0.000 description 1
- 206010029350 Neurotoxicity Diseases 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 206010044221 Toxic encephalopathy Diseases 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005341 cation exchange Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006388 chemical passivation reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000009693 chronic damage Effects 0.000 description 1
- 235000009508 confectionery Nutrition 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000035558 fertility Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 231100000304 hepatotoxicity Toxicity 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- RYZCLUQMCYZBJQ-UHFFFAOYSA-H lead(2+);dicarbonate;dihydroxide Chemical group [OH-].[OH-].[Pb+2].[Pb+2].[Pb+2].[O-]C([O-])=O.[O-]C([O-])=O RYZCLUQMCYZBJQ-UHFFFAOYSA-H 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 210000004185 liver Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 231100000417 nephrotoxicity Toxicity 0.000 description 1
- 231100000228 neurotoxicity Toxicity 0.000 description 1
- 230000007135 neurotoxicity Effects 0.000 description 1
- 230000008635 plant growth Effects 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000012954 risk control Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 238000003900 soil pollution Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B79/00—Methods for working soil
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
-
- 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
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
-
- 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
- C09K2101/00—Agricultural use
Abstract
The invention discloses a soil conditioner for restoring a mercury-polluted farmland and a preparation method and application thereof, belonging to the field of restoring heavy metal-polluted soil of the farmland. The soil conditioner comprises: magnesium modified rice hull carbon-based struvite, calcium magnesium phosphate fertilizer and humic acid; the magnesium modified rice hull carbon-based struvite is a product obtained by mixing magnesium modified rice hull carbon obtained by reacting rice hull carbon with a magnesium-containing solution and black water. The soil conditioner is suitable for mercury-polluted farmland soil, and the preparation method is simple, has a good remediation effect on heavy metals in soil, is stable and long-acting, and is less affected by the environment.
Description
Technical Field
The invention belongs to the field of farmland heavy metal polluted soil remediation, and particularly relates to a soil conditioner for mercury polluted farmland remediation, and a preparation method and application thereof.
Background
Mercury is commonly called mercury, the freezing point of which is-38.83 ℃, the boiling point of which is 356.73 ℃, and the mercury is a silver white liquid metal at normal temperature and has extremely strong volatility. Mercury exists in nature as 7 stable isotopes, and exists in the form of elemental mercury, inorganic mercury, and organic mercury in the environment. Mercury is commonly used in daily life for chemical drugs, medical devices, electronic or electric products, and in recent years, with the increasing awareness of mercury toxicity, mercury is gradually eliminated in these fields, but still plays an important role in scientific research and dentistry. However, for organisms, mercury is a biological toxicity chemical substance, and can cause chronic damage to human health, mainly manifested in aspects of neurotoxicity, liver and kidney toxicity, and the like. Research shows that the mercury pollution of the soil not only causes harm to the quality safety of agricultural products, but also threatens the health of human bodies and the safety of ecological environment. Human awareness of mercury toxicity has been around for centuries, and events that have had a significant impact on human health due to environmental exposure to mercury, i.e., the present water-borne event, occurred in the last 50 th century. After the 21 st century, with the global emphasis on human living environment, the mercury pollution problem has attracted wide attention of all the world.
At present, the technology for remedying the heavy metal pollution of farmland soil by various countries in the world mainly comprises physical, chemical, biological, agricultural and ecological technologies, combined remediation technologies and the like, wherein the in-situ chemical passivation remediation technology has the advantages of simplicity, convenience, rapidness, high efficiency and the like, and is a better choice for remedying the farmland soil polluted by heavy metal in a large area. At present, a soil conditioner which has the advantages of simple formula, high mercury pollution degradation efficiency and good soil remediation effect at the same time does not appear in the field.
Disclosure of Invention
Based on objective problems and requirements in the field, the invention aims to provide a heavy metal contaminated farmland remediation soil conditioner and a preparation method thereof, and the heavy metal contaminated farmland remediation soil conditioner is suitable for mercury contaminated farmland soil. The preparation method is simple, and the preparation has good effect of repairing heavy metals in soil, is stable and long-acting, and is less influenced by environment.
The technical scheme of the invention is as follows:
a soil conditioner for remediation of mercury contaminated farmland comprising: magnesium modified rice hull carbon-based struvite, calcium magnesium phosphate fertilizer and humic acid;
the magnesium modified rice hull carbon-based struvite is a product obtained by mixing magnesium modified rice hull carbon obtained by reacting rice hull carbon with a magnesium-containing solution and black water.
The soil conditioner comprises the following raw materials in parts by weight: 4-7 parts of magnesium modified rice hull carbon-based struvite, 2-3 parts of calcium magnesium phosphate fertilizer and 1-2 parts of humic acid.
The soil conditioner comprises the following raw materials in parts by weight: 5 parts of magnesium modified rice hull carbon-based struvite, 3 parts of calcium magnesium phosphate fertilizer and 2 parts of humic acid.
The reaction of the rice husk carbon and the magnesium-containing solution means that after the rice husk carbon and the magnesium-containing solution are uniformly mixed, the precipitate is obtained by suction filtration and dried to constant weight to obtain magnesium modified rice husk carbon;
preferably, the rice husk carbon is mixed with a magnesium-containing solution according to a solid-to-liquid ratio of 1: 10;
more preferably, the uniform mixing refers to oscillating the rice husk carbon and the magnesium-containing solution at 150r/min for 12 h;
preferably, the mass volume ratio of the magnesium modified rice husk carbon to the black water is 10 g: 1L;
more preferably, the magnesium modified rice hull carbon is mixed with black water and then oscillated for 4 hours at 150 r/min.
The magnesium-containing solution is a magnesium chloride solution; the black water has a pH value of more than or equal to 9; the black water refers to fecal sewage.
The preparation method of the soil conditioner for restoring the mercury-polluted farmland comprises the following steps: mixing magnesium modified rice hull carbon obtained by reacting rice hull carbon with a magnesium-containing solution with black water to obtain magnesium modified rice hull carbon-based struvite; and mixing the magnesium modified rice hull carbon-based struvite with a calcium magnesium phosphate fertilizer and humic acid to prepare the soil conditioner.
The rice husk carbon is prepared by firing rice husks for 2 hours at 500 ℃;
preferably, the rice husk charcoal is ground and sieved by a 10-mesh sieve;
the reaction of the rice husk carbon and the magnesium-containing solution means that after the rice husk carbon and the magnesium-containing solution are uniformly mixed, the precipitate is obtained by suction filtration and dried to constant weight to obtain magnesium modified rice husk carbon;
preferably, the rice husk carbon is mixed with a magnesium-containing solution according to a solid-to-liquid ratio of 1: 10;
more preferably, the uniform mixing refers to oscillating the rice husk carbon and the magnesium-containing solution at 150r/min for 12 h;
preferably, the mass volume ratio of the magnesium modified rice husk carbon to the black water is 10 g: 1L;
more preferably, the magnesium modified rice hull carbon is mixed with black water and then oscillated for 4 hours at 150 r/min;
more preferably, the magnesium-containing solution is a magnesium chloride solution; the black water is black water with pH value more than or equal to 9.
The magnesium modified rice hull carbon-based struvite, a calcium magnesium phosphate fertilizer and humic acid are respectively mixed according to the following weight ratio: 4-7 parts of magnesium modified rice hull carbon-based struvite, 2-3 parts of calcium magnesium phosphate fertilizer and 1-2 parts of humic acid;
preferably, 5 parts of magnesium modified rice hull carbon-based struvite, 3 parts of calcium magnesium phosphate fertilizer and 2 parts of humic acid;
more preferably, the black water refers to fecal sewage.
The mercury-polluted farmland restoration method is characterized in that the soil conditioner is applied to a mercury-polluted farmland, and/or the soil conditioner prepared by the preparation method is applied to the mercury-polluted farmland.
Applying the soil conditioner according to 0.5-2% of the mass of the dry soil in the mercury-polluted farmland;
preferably, the soil conditioner is applied to the mercury-polluted farmland soil and then is fully and uniformly mixed;
more preferably, the soil is maintained at a water content of 60% after thorough mixing.
The preparation method of the mercury-polluted farmland soil conditioner comprises the following raw materials in parts by mass: rice husk charcoal, MgCl2Solid, calcium magnesium phosphate fertilizer, humic acid, NaOH and H2SO4And black water.
The preparation method of the magnesium modified rice hull carbon based struvite farmland soil conditioner comprises the following steps:
(1) preparing rice husk charcoal: the harvested rice is air-dried and then hulled, the obtained rice hulls are put into a porcelain sweet pot, wrapped by tinfoil, put into a muffle furnace and fired at 500 ℃ for 2 hours to obtain rice hull carbon, and the rice hull carbon is ground and sieved by a 10-mesh sieve for later use.
(2) Preparing magnesium modified rice husk charcoal: preparing a magnesium solution (10mol/L MgCl)2) Putting the rice husk charcoal into the solution according to the solid-to-liquid ratio of 1:10, oscillating for 12h at 150r/min, filtering, taking the precipitate, and drying to constant weight.
(3) Preparing magnesium modified rice hull carbon-based struvite: with NaOH and H2SO4Adjusting the pH value of the black water to be at least 9.0, putting 10g of rice hull carbon into 1.0L of black water, and oscillating for 4h at 150r/min to generate the magnesium modified rice hull carbon-based struvite.
(4) Preparing a magnesium modified rice hull carbon-based struvite soil conditioner: selecting 4-7 parts of magnesium modified rice hull carbon-based struvite, 2-3 parts of calcium magnesium phosphate fertilizer and 1-2 parts of humic acid, and uniformly mixing to obtain the magnesium modified rice hull carbon-based struvite soil conditioner.
Struvite (MgNH)4PO4·6H2O) is a product for recovering nitrogen and phosphorus from sewage or industrial wastewater, and the invention utilizes the potential of struvite for stabilizing heavy metals and can provide nutrient elements such as nitrogen, phosphorus, magnesium and the like for plants when the struvite is applied to soil as a slow release fertilizer. The biochar has large specific surface area, contains rich basic functional groups, and has stronger adsorption effect and stabilization effect on heavy metals. The biochar and the struvite are combined through a certain chemical means, so that the recovery efficiency of nitrogen and phosphorus elements in sewage can be improved, and green and efficient raw materials can be provided for the research and development of the soil conditioner for the in-situ chemical remediation technology of the heavy metal contaminated soil.
Compared with the prior art, the invention has the advantages that:
(1) the rice husk carbon in the raw materials of the soil conditioner has wide sources and is environment-friendly, and secondary pollution to the environment can not be generated. The method can be used for recovering nutrient elements such as nitrogen and phosphorus in the black water and recycling the black water.
(2) When the method adopts the black water to prepare the magnesium modified rice hull carbon-based struvite, the magnesium modified rice hull carbon can provide a carrier for the generation of the struvite in the black water, so that the struvite is easy to separate and recycle from the black water.
(3) The rice husk carbon has the capability of stabilizing heavy metals in soil, and has larger cation exchange capacity when adsorbing excessive ammonia nitrogen in black water, and the capability of stabilizing the heavy metals is improved.
(4) The magnesium modified rice hull carbon-based struvite obtained by the invention can be applied to soil to improve the storage capacity of carbon in a soil carbon reservoir, improve the soil fertility and improve the soil structure, and can provide nutrients for the growth of plants while reducing the content of effective heavy metals in the soil.
Detailed Description
The present invention is further illustrated by the following specific examples, which are intended to be illustrative only and not to limit the scope of the invention. The experimental methods used in the following examples are all conventional methods unless otherwise specified; the materials, reagents and the like used are commercially available unless otherwise specified.
Group 1 examples soil conditioners of the invention
The group of embodiments provides a soil conditioner for mercury contaminated farmland remediation, comprising: magnesium modified rice hull carbon-based struvite, calcium magnesium phosphate fertilizer and humic acid;
the magnesium modified rice hull carbon-based struvite is a product obtained by mixing magnesium modified rice hull carbon obtained by reacting rice hull carbon with a magnesium-containing solution and black water.
The "black water" herein refers to fecal sewage, which refers to washing water excreted in daily life of residents, and includes two types of sewage: 1. domestic sewage containing fecal matter; 2. toilet sewage including toilet flushing water and feces.
In a specific embodiment, the soil conditioner comprises the following raw materials in parts by weight: 4-7 parts of magnesium modified rice hull carbon-based struvite, 1-4 parts of calcium magnesium phosphate fertilizer and 2-5 parts of humic acid.
In other embodiments, the soil conditioner may also be selected from any one of the following formulations in table 1:
TABLE 1
The remediation effect of the mercury contaminated farmland in the table is effective mercury pollution reduction rate data obtained by applying the soil conditioner of the invention for 10 days in the actual mercury contaminated farmland according to a dry soil mass ratio of 0.25-2% (by mass) and a dry soil and wet soil conversion formula in the group 3 embodiment. The actual mercury-contaminated farmland soil is farmland soil around a mining area selected in the following experimental examples 1-3, and the specific application method is to sprinkle the soil conditioner into the farmland soil according to the calculated dosage.
In the above table, the upper and lower limit values of the reduction rate of the mercury pollution in the effective state respectively correspond to the upper and lower limit values of the application amount of the soil conditioner, in other words, the higher the usage amount of the soil conditioner is, the higher the reduction rate of the mercury pollution in the effective state is, within the range of 0.25% -2% of the usage amount of the soil conditioner is. However, beyond this range, the reduction of mercury pollution in the available state does not tend to increase linearly with the amount of soil conditioner, i.e., when the amount of soil conditioner exceeds 2%, the amount of soil conditioner increases further, and the economic investment and the cost performance of the reduction effect are not high.
In a preferred embodiment, the soil conditioner comprises the following raw materials in parts by weight: 5 parts of magnesium modified rice hull carbon-based struvite, 3 parts of calcium magnesium phosphate fertilizer and 2 parts of humic acid.
In some embodiments, the reaction of the rice husk carbon with the magnesium-containing solution means that after the rice husk carbon and the magnesium-containing solution are uniformly mixed, the precipitate is obtained by suction filtration and dried to a constant weight to obtain magnesium-modified rice husk carbon;
preferably, the rice husk carbon is mixed with a magnesium-containing solution according to a solid-to-liquid ratio of 1: 10; the proportion is the common proportion of the modified biochar, and the rice husk carbon is one of the biochar, and the proportion is mixed with the magnesium solution to obtain better modification effect.
More preferably, the uniform mixing refers to oscillating the rice husk carbon and the magnesium-containing solution at 150r/min for 12 h;
preferably, the mass-to-volume ratio of the magnesium modified rice hull carbon to the black water is 10g to 1L, and the ratio is favorable for the generation of struvite and can improve the recovery rate of struvite in the black water.
More preferably, the magnesium modified rice hull carbon is mixed with black water and then oscillated for 4 hours at 150 r/min.
In a more specific embodiment, the magnesium-containing solution is a magnesium chloride solution; the black water has a pH value of more than or equal to 9. Under the condition of the pH value, the method is favorable for the generation of struvite and can improve the recovery rate of the struvite in the black water.
EXAMPLE 2 preparation of soil conditioner of the invention
The group of embodiments provides a preparation method of a soil conditioner for mercury-polluted farmland remediation, which comprises the following steps: mixing magnesium modified rice hull carbon obtained by reacting rice hull carbon with a magnesium-containing solution with black water to obtain magnesium modified rice hull carbon-based struvite; and mixing the magnesium modified rice hull carbon-based struvite with a calcium magnesium phosphate fertilizer and humic acid to prepare the soil conditioner.
In a specific embodiment, the rice husk carbon is prepared by firing rice husks at 500 ℃ for 2 h;
preferably, the rice husk charcoal is ground and sieved by a 10-mesh sieve;
in other embodiments, the rice husk carbon used in the present invention may be carbonized rice husk or rice husk carbon prepared by other methods commonly used in the art, and the preparation of the rice husk carbon is not limited to the method described in the present invention.
In a further embodiment, the reaction of the rice husk carbon and the magnesium-containing solution means that after the rice husk carbon and the magnesium-containing solution are uniformly mixed, the precipitate is obtained by suction filtration and dried to constant weight to obtain magnesium modified rice husk carbon;
preferably, the rice husk carbon is mixed with a magnesium-containing solution according to a solid-to-liquid ratio of 1: 10;
more preferably, the uniform mixing refers to oscillating the rice husk carbon and the magnesium-containing solution at 150r/min for 12 h;
preferably, the mass volume ratio of the magnesium modified rice husk carbon to the black water is 10 g: 1L;
more preferably, the magnesium modified rice hull carbon is mixed with black water and then oscillated for 4 hours at 150 r/min;
more preferably, the magnesium-containing solution is a magnesium chloride solution; the black water is black water with pH value more than or equal to 9.
In some embodiments, the magnesium modified rice hull carbon based struvite is mixed with a calcium magnesium phosphate fertilizer and humic acid according to the following weight ratio: 4-7 parts of magnesium modified rice hull carbon-based struvite, 2-3 parts of calcium magnesium phosphate fertilizer and 1-2 parts of humic acid;
preferably, 5 parts of magnesium modified rice hull carbon-based struvite, 3 parts of calcium magnesium phosphate fertilizer and 2 parts of humic acid.
Group 3 example, the Mercury contaminated Farmland remediation method of the invention
The embodiment of the group provides a mercury-polluted farmland remediation method, which is characterized in that the soil conditioner prepared by the preparation method of any one of the embodiment of the group 1 and/or the soil conditioner prepared by the preparation method of any one of the embodiment of the group 2 is applied to a mercury-polluted farmland.
In some embodiments, the soil conditioner is applied at 0.5% to 2% (mass ratio) of the mass of dry soil in the mercury contaminated field; the application proportion can be used for small trial tests and actual farmland restoration, dry soil comes from a farmland, the soil is taken back from the farmland, and the dry soil is obtained by spreading the dry soil indoors, drying the dry soil by grinding and sieving. In practical application, the conditioner of the invention can be directly applied to wet soil or paddy field soil, and is converted according to different moisture contents (soil moisture content percentage) in the soil, and the conversion formula is as follows:
dry (M) wet (M) x (1-percent of soil moisture n)
Preferably, the soil conditioner is applied to the mercury-polluted farmland soil and then is fully and uniformly mixed;
more preferably, the soil is maintained at a water content of 60% after thorough mixing. The reason for maintaining the water content of 60% is as follows: firstly, the conditioner can be uniformly mixed with the soil under the moisture condition, and secondly, the soil conditioner can not float or run off.
Experimental example 1
The effect of a pilot test is explained by taking the soil of a farmland polluted by mercury around a certain mining area as a repairing object (the total mercury content is 1.69mg/kg, wherein the available mercury content is 0.33mg/kg), and the effect is specifically as follows:
respectively weighing 50.0g of soil sample into 125ml of plastic cups, adding a conditioner (0.5-2% of the dry soil), fully and uniformly mixing, keeping the water content of the dry soil at 60%, and repeating the treatment for 3 times by taking no conditioner CK as a reference. And (5) culturing for 10 days at room temperature in an open environment, and analyzing a soil sample to determine the effective state of soil mercury.
The pilot test results were as follows:
TABLE 1 Small test experiments the mercury available content and pH value of each soil tested
Experimental example 2
The effect of a pilot test is illustrated by taking the soil of a farmland polluted by mercury around a certain mining area as a restoration object (the total mercury content is 5.42mg/kg, and the available mercury content is 0.95mg/kg), and the effect is as follows:
respectively weighing 50.0g of soil sample into 125ml of plastic cups, adding a conditioner (0.5-2% of the dry soil), fully and uniformly mixing, keeping the water content of the dry soil at 60%, and repeating the treatment for 3 times by taking no conditioner CK as a reference. And (5) culturing for 10 days at room temperature in an open environment, and analyzing a soil sample to determine the effective state of soil mercury.
The pilot test results were as follows:
TABLE 2 Small test experiments the mercury available content and pH value of each soil tested
Experimental example 3
The effect of a pilot test is explained by taking the soil of a mercury polluted farmland around a certain mining area as a repairing object (the total mercury content is 9.27mg/kg, wherein the effective cadmium content is 1.66mg/kg), and the concrete steps are as follows:
respectively weighing 50.0g of soil sample into 125ml of plastic cups, adding a conditioner (0.5-2% of the dry soil), fully and uniformly mixing, keeping the water content of the dry soil at 60%, and repeating the treatment for 3 times by taking no conditioner CK as a reference. And (5) culturing for 10 days at room temperature in an open environment, and analyzing a soil sample to determine the effective state of soil mercury.
The pilot test results were as follows:
TABLE 3 Small test experiments the mercury available content and pH value of each soil tested
Further description of the contents of the experiment described in any of Experimental examples 1 to 3 of the present invention: the more specific experimental process is as follows: firstly, soil is collected, the total mercury content and the effective state content of the soil are detected, and whether the soil can be used as a research object is judged (the judgment standard is 'soil environmental quality agricultural land soil pollution risk control standard (trial)', and the soil with the total mercury content exceeding the standard is selected as the research object). For satisfactory soil samples, they may be subjected to the described pilot test in which a blank control is set to compare the effects of the other treatments.
The experimental examples are single factor tests, all treatments were at the same time, same environment, same temperature and humidity, the only difference being the difference in conditioner addition.
Secondly, the reduction range of the effective mercury by adding the conditioner is only compared with that of a blank control and not compared with that of the experimental original soil.
Thirdly, no matter the blank control or the treatment with the addition of the conditioner, the reduction rate of the available mercury cannot be compared with the data of the available mercury in the experimental original soil, because the original soil and the experimental treatment have different environments, different moisture contents, and different detection and analysis, and have no comparability.
The blank had a slight decrease in the content of active form compared to the original soil due to: the blank dry soil was incubated for a period of time with 60% by mass of water (i.e., 60% water content) that caused a change in the redox potential in the soil, resulting in a difference in the available state content.
Claims (23)
1. The soil conditioner for restoring the mercury-polluted farmland is characterized by comprising the following raw materials in parts by weight: 4-7 parts of magnesium modified rice hull carbon-based struvite, 2-3 parts of calcium magnesium phosphate fertilizer and 1-2 parts of humic acid;
the magnesium modified rice hull carbon-based struvite is a product obtained by mixing magnesium modified rice hull carbon obtained by reacting rice hull carbon with a magnesium-containing solution and black water.
2. The soil conditioner of claim 1, comprising the following raw materials in parts by weight: 5 parts of magnesium modified rice hull carbon-based struvite, 3 parts of calcium magnesium phosphate fertilizer and 2 parts of humic acid.
3. The soil conditioner according to claim 1, wherein the reaction of the rice husk carbon with the magnesium-containing solution means that after the rice husk carbon and the magnesium-containing solution are uniformly mixed, the magnesium-modified rice husk carbon is obtained by leaching, taking the precipitate and drying the precipitate to constant weight.
4. The soil conditioner of claim 3, wherein the rice husk char is mixed with a magnesium-containing solution in a solid-to-liquid ratio of 1: 10.
5. The soil conditioner according to claim 3, wherein the uniform mixing means shaking the rice husk carbon and the magnesium-containing solution at 150r/min for 12 h.
6. The soil conditioner according to claim 1, wherein the mass volume ratio of the magnesium modified rice husk carbon to the black water is 10 g: 1L.
7. The soil conditioner according to claim 1, wherein the magnesium modified rice hull charcoal is shaken for 4 hours at 150r/min after being mixed with black water.
8. The soil conditioner of claim 1, wherein the magnesium-containing solution is a magnesium chloride solution; the black water has a pH value of more than or equal to 9; the black water refers to fecal sewage.
9. The preparation method of the soil conditioner for restoring the mercury-polluted farmland is characterized by comprising the following steps: mixing magnesium modified rice hull carbon obtained by reacting rice hull carbon with a magnesium-containing solution with black water to obtain magnesium modified rice hull carbon-based struvite; and mixing the magnesium modified rice hull carbon-based struvite with a calcium magnesium phosphate fertilizer and humic acid to prepare the soil conditioner.
10. The method according to claim 9, wherein the rice husk charcoal is obtained by firing rice husk at 500 ℃ for 2 hours.
11. The method of claim 9, wherein the rice husk char is ground and sieved through a 10 mesh sieve;
the reaction of the rice husk carbon and the magnesium-containing solution means that after the rice husk carbon and the magnesium-containing solution are uniformly mixed, the precipitate is obtained by suction filtration and dried to constant weight, and the magnesium modified rice husk carbon is obtained.
12. The method according to claim 9, wherein the rice husk carbon is mixed with a magnesium-containing solution in a solid-to-liquid ratio of 1: 10.
13. The preparation method according to claim 11, wherein the uniform mixing means shaking the rice husk carbon and the magnesium-containing solution at 150r/min for 12 h.
14. The preparation method according to claim 9, wherein the mass-to-volume ratio of the magnesium-modified rice husk carbon to the black water is 10 g: 1L.
15. The preparation method according to claim 9, wherein the magnesium modified rice husk carbon is shaken at 150r/min for 4 hours after being mixed with black water.
16. The production method according to claim 9, wherein the magnesium-containing solution is a magnesium chloride solution; the black water is black water with pH value more than or equal to 9.
17. The preparation method of claim 9, wherein the magnesium modified rice hull carbon based struvite is mixed with a calcium magnesium phosphate fertilizer and humic acid according to the following weight ratio: 4-7 parts of magnesium modified rice hull carbon-based struvite, 2-3 parts of calcium magnesium phosphate fertilizer and 1-2 parts of humic acid.
18. The method according to claim 17, wherein the magnesium-modified rice hull carbon-based struvite comprises 5 parts, 3 parts of calcium magnesium phosphate fertilizer and 2 parts of humic acid.
19. The method of claim 9, wherein the black water is fecal sewage.
20. A method for remediating a mercury-contaminated farmland, characterized by applying the soil conditioner according to any one of claims 1 to 8 and/or the soil conditioner obtained by the production method according to any one of claims 9 to 19 to the mercury-contaminated farmland.
21. The method of remediating a mercury-contaminated farmland as claimed in claim 20, wherein the soil conditioner is applied in an amount of 0.5% to 2% by mass of the dry soil in the mercury-contaminated farmland.
22. The method of remediating a mercury-contaminated farmland as claimed in claim 21, wherein the soil conditioner is applied to the soil of the mercury-contaminated farmland and then mixed thoroughly.
23. The method of remediating a mercury contaminated farmland as claimed in claim 22, wherein the soil is maintained at a water content of 60% after being sufficiently mixed.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910080369.0A CN109678626B (en) | 2019-01-28 | 2019-01-28 | Soil conditioner for mercury-polluted farmland remediation and preparation method and application thereof |
| PCT/CN2019/090524 WO2020155510A1 (en) | 2019-01-28 | 2019-06-10 | Soil conditioner used for restoring mercury-contaminated agricultural land, and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910080369.0A CN109678626B (en) | 2019-01-28 | 2019-01-28 | Soil conditioner for mercury-polluted farmland remediation and preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109678626A CN109678626A (en) | 2019-04-26 |
| CN109678626B true CN109678626B (en) | 2022-03-18 |
Family
ID=66194836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910080369.0A Expired - Fee Related CN109678626B (en) | 2019-01-28 | 2019-01-28 | Soil conditioner for mercury-polluted farmland remediation and preparation method and application thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109678626B (en) |
| WO (1) | WO2020155510A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109678626B (en) * | 2019-01-28 | 2022-03-18 | 湖南恒凯环保科技投资有限公司 | Soil conditioner for mercury-polluted farmland remediation and preparation method and application thereof |
| CN111483996A (en) * | 2020-04-24 | 2020-08-04 | 华中科技大学 | Method for preparing struvite by treating nitrogen and phosphorus-containing wastewater with rice husk carbon |
| CN113322078B (en) * | 2021-06-03 | 2022-03-22 | 江西源春环保科技有限公司 | Granules for comprehensively treating heavy metals in soil and preparation method thereof |
| CN113396789A (en) * | 2021-07-07 | 2021-09-17 | 江苏省农业科学院 | Method for planting rice in weakly acidic soil with slight mercury pollution |
| CN113528143B (en) * | 2021-07-08 | 2022-09-09 | 华中农业大学 | Rice hull ash powder composite material, and granulation method and application thereof |
| CN117037932B (en) * | 2023-07-25 | 2024-03-19 | 中国科学院南京土壤研究所 | Method for calculating farmland supporting ditch water withdrawal amount and identifying water age distribution based on isotopes |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103990643A (en) * | 2014-05-30 | 2014-08-20 | 深圳市龙澄高科技环保有限公司 | Biomass waste low-temperature damp-hot carbonization treatment technology and device |
| CN104028547A (en) * | 2014-06-24 | 2014-09-10 | 深圳市龙澄高科技环保有限公司 | Municipal solid waste extreme decrement and highly resourceful treatment process and municipal solid waste extreme decrement and highly resourceful treatment device |
| CN104310629A (en) * | 2014-09-24 | 2015-01-28 | 同济大学 | Method for safely utilizing livestock and poultry biogas liquid in farmland |
| CN105316002A (en) * | 2015-11-27 | 2016-02-10 | 同济大学 | Preparation method of multifunctional repair agent used for governing heavy metal contaminated soil |
| CN106277166A (en) * | 2016-08-31 | 2017-01-04 | 昆明理工大学 | A kind of modification biological charcoal is utilized to remove the method for antibiotic in breeding wastewater |
| CN106734123A (en) * | 2016-11-18 | 2017-05-31 | 东莞中科土壤科技开发有限公司 | A kind of composite conditioner repaired for heavy metal polluted soil of farmland and preparation method thereof |
| CN106986720A (en) * | 2017-03-22 | 2017-07-28 | 湖南永清水务有限公司 | The method for producing soil conditioner using the waste residue for handling livestock breeding wastewater generation |
| CN107459025A (en) * | 2016-06-03 | 2017-12-12 | 中国科学院城市环境研究所 | A kind of modification biological charcoal preparation method for efficiently adsorbing Inorganic Phosphorus Fractions in Soil and dissolved organic phosphorus simultaneously and application |
| CN108192631A (en) * | 2017-12-26 | 2018-06-22 | 湖南恒凯环保科技投资有限公司 | A kind of charcoal base flora composite soil conditioner and its preparation and application |
| CN108485679A (en) * | 2018-05-29 | 2018-09-04 | 广东省农业科学院农业资源与环境研究所 | A kind of charcoal base organic-inorganic compound soil conditioner and its preparation method and application of improvement cadmium pollution soil |
| CN109095955A (en) * | 2018-07-03 | 2018-12-28 | 西北农林科技大学 | A kind of preparation method and applications of magnesium salts modification biological charcoal |
| CN109181704A (en) * | 2018-09-12 | 2019-01-11 | 四川中地安土壤修复技术有限公司 | A kind of heavy metal-polluted soil and organic contamination renovation agent and its preparation and application method |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7182872B2 (en) * | 2003-08-01 | 2007-02-27 | Wisconsin Alumni Research Foundation | Struvite crystallization |
| CA2476037A1 (en) * | 2003-08-01 | 2005-02-01 | Wisconsin Alumni Research Foundation | Struvite crystallization |
| CN103710029B (en) * | 2013-12-20 | 2017-01-04 | 中节能六合天融环保科技有限公司 | A kind of targeting stabilizer of restoration of soil polluted by heavy metal |
| CN106083377A (en) * | 2016-06-22 | 2016-11-09 | 湖南农业大学 | A kind of Oryza sativa L. fall cadmium charcoal base Recompounded multielement soil conditioner and application thereof |
| CN106116980A (en) * | 2016-08-19 | 2016-11-16 | 刘建伟 | A kind of charcoal fertilizer |
| CN107360750A (en) * | 2017-06-28 | 2017-11-21 | 常州通和建筑工程有限公司 | A kind of continuous cropping soil processing method |
| CN107162787A (en) * | 2017-06-29 | 2017-09-15 | 太仓东浔生物科技有限公司 | A kind of high fertilizer efficiency charcoal fertilizer of high adsorption |
| CN107686432A (en) * | 2017-08-29 | 2018-02-13 | 陕西金凤现代农业科技有限责任公司 | Multifunction soil remediation fertilizer and preparation method thereof |
| CN107603632B (en) * | 2017-08-31 | 2020-02-04 | 航天凯天环保科技股份有限公司 | Inorganic-organic composite soil conditioner and application thereof |
| CN108003881A (en) * | 2017-11-10 | 2018-05-08 | 郑州搜趣信息技术有限公司 | A kind of soil-repairing agent for soil remediation and preparation method thereof |
| CN108329106A (en) * | 2018-03-28 | 2018-07-27 | 农业部规划设计研究院 | A kind of pig manure aerobic fermentation heavy metals in process passivating method |
| CN108689781A (en) * | 2018-06-29 | 2018-10-23 | 牛静洁 | Biomass carbon base soil-repairing agent and preparation method thereof |
| CN109020748A (en) * | 2018-07-25 | 2018-12-18 | 南京格洛特环境工程股份有限公司 | Heavy metal soil-repairing agent |
| CN108863582A (en) * | 2018-08-10 | 2018-11-23 | 芜湖响民生态农业有限公司 | A kind of winter vegetable plantation organic and inorganic base fertilizer and preparation method thereof |
| CN109160572A (en) * | 2018-09-15 | 2019-01-08 | 天津大学 | The combination processing method that nitrogen P elements recycle in urine waste water based on charcoal |
| CN109020705A (en) * | 2018-09-17 | 2018-12-18 | 中国农业大学 | A kind of method of organic waste aerobic fermentation compost quick composting and elemental stable |
| CN109233840B (en) * | 2018-09-20 | 2020-07-28 | 鞍钢集团矿业有限公司 | Composite repairing agent for heavy metal contaminated soil and application thereof |
| CN109678626B (en) * | 2019-01-28 | 2022-03-18 | 湖南恒凯环保科技投资有限公司 | Soil conditioner for mercury-polluted farmland remediation and preparation method and application thereof |
-
2019
- 2019-01-28 CN CN201910080369.0A patent/CN109678626B/en not_active Expired - Fee Related
- 2019-06-10 WO PCT/CN2019/090524 patent/WO2020155510A1/en active Application Filing
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103990643A (en) * | 2014-05-30 | 2014-08-20 | 深圳市龙澄高科技环保有限公司 | Biomass waste low-temperature damp-hot carbonization treatment technology and device |
| CN104028547A (en) * | 2014-06-24 | 2014-09-10 | 深圳市龙澄高科技环保有限公司 | Municipal solid waste extreme decrement and highly resourceful treatment process and municipal solid waste extreme decrement and highly resourceful treatment device |
| CN104310629A (en) * | 2014-09-24 | 2015-01-28 | 同济大学 | Method for safely utilizing livestock and poultry biogas liquid in farmland |
| CN105316002A (en) * | 2015-11-27 | 2016-02-10 | 同济大学 | Preparation method of multifunctional repair agent used for governing heavy metal contaminated soil |
| CN107459025A (en) * | 2016-06-03 | 2017-12-12 | 中国科学院城市环境研究所 | A kind of modification biological charcoal preparation method for efficiently adsorbing Inorganic Phosphorus Fractions in Soil and dissolved organic phosphorus simultaneously and application |
| CN106277166A (en) * | 2016-08-31 | 2017-01-04 | 昆明理工大学 | A kind of modification biological charcoal is utilized to remove the method for antibiotic in breeding wastewater |
| CN106734123A (en) * | 2016-11-18 | 2017-05-31 | 东莞中科土壤科技开发有限公司 | A kind of composite conditioner repaired for heavy metal polluted soil of farmland and preparation method thereof |
| CN106986720A (en) * | 2017-03-22 | 2017-07-28 | 湖南永清水务有限公司 | The method for producing soil conditioner using the waste residue for handling livestock breeding wastewater generation |
| CN108192631A (en) * | 2017-12-26 | 2018-06-22 | 湖南恒凯环保科技投资有限公司 | A kind of charcoal base flora composite soil conditioner and its preparation and application |
| CN108485679A (en) * | 2018-05-29 | 2018-09-04 | 广东省农业科学院农业资源与环境研究所 | A kind of charcoal base organic-inorganic compound soil conditioner and its preparation method and application of improvement cadmium pollution soil |
| CN109095955A (en) * | 2018-07-03 | 2018-12-28 | 西北农林科技大学 | A kind of preparation method and applications of magnesium salts modification biological charcoal |
| CN109181704A (en) * | 2018-09-12 | 2019-01-11 | 四川中地安土壤修复技术有限公司 | A kind of heavy metal-polluted soil and organic contamination renovation agent and its preparation and application method |
Non-Patent Citations (1)
| Title |
|---|
| A/A/MBBR工艺处理混合污水的脱氮除磷中试研究;余建恒 等;《中国给水排水》;20091101;第25卷(第21期);第26-28页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109678626A (en) | 2019-04-26 |
| WO2020155510A1 (en) | 2020-08-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109678626B (en) | Soil conditioner for mercury-polluted farmland remediation and preparation method and application thereof | |
| Su et al. | Chemical speciation and phytoavailability of Zn, Cu, Ni and Cd in soil amended with fly ash-stabilized sewage sludge | |
| CN107115840B (en) | Carbon-based composite material for repairing arsenic-cadmium contaminated soil and application thereof | |
| CN110283599B (en) | Heavy metal contaminated soil remediation agent and preparation method thereof | |
| Qiu et al. | Remediation of cadmium-contaminated soil with biochar simultaneously improves biochar’s recalcitrance | |
| Liu et al. | Composting enhances the removal of lead ions in aqueous solution by spent mushroom substrate: Biosorption and precipitation | |
| CN107857674B (en) | Oyster shell soil repairing agent and preparation method thereof | |
| CN107502362B (en) | Method for preparing acid soil conditioner from papermaking black liquor and application thereof | |
| CN111659351B (en) | Modified biological carbon capable of simultaneously releasing silicon and adsorbing heavy metals efficiently and preparation method thereof | |
| CN104957009A (en) | Method for regulating turfgrass heavy metal accumulation by using OTC and carbon nano-tube interlayer | |
| CN104904574A (en) | Method for controlling accumulation of heavy metal in turfgrass by means of siduron and carbon nano tube interlayer | |
| CN114029333A (en) | Novel method for repairing soil polluted by heavy metals of cadmium, lead, mercury and chromium | |
| CN112090950A (en) | Paddy field heavy metal pollution remediation material and processing method and remediation method thereof | |
| CN110922979B (en) | Heavy metal lead-arsenic compound contaminated soil remediation agent and preparation method thereof | |
| CN113750962A (en) | Method for preparing modified biochar by co-pyrolyzing red mud and pennisetum hydridum straws and application of modified biochar | |
| WO2022199308A1 (en) | Porous biochar for improving severe pollution and preparation method therefor | |
| He et al. | Co-pyrolysis of pig manure and magnesium-containing waste residue and phosphorus recovery for planting feed corn | |
| CN110885690A (en) | Stabilizer for in-situ remediation of soil heavy metal pollution and application thereof | |
| CN113248333A (en) | Granular soil conditioner for composite heavy metal pollution and preparation method thereof | |
| CN110724535B (en) | Novel ecological garden greening soil remediation treatment agent and preparation method thereof | |
| CN109971488B (en) | Paddy field soil cadmium pollution passivator and preparation method and application thereof | |
| CN111944535A (en) | Soil stabilizing agent and preparation method and application thereof | |
| CN111454727A (en) | Soil conditioner and method for improving soil by using same | |
| Adamcová et al. | Removal of landfill leachate toxicity by adsorption on white rot fungi (Pleurotus Ostreatus) | |
| Lu et al. | Impact of plant harvesting on nitrogen and phosphorus removal in constructed wetlands treating agricultural region wastewater |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220318 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |