CN117816728A - Application of polygonum capitatum in remediation of heavy metal contaminated soil - Google Patents
Application of polygonum capitatum in remediation of heavy metal contaminated soil Download PDFInfo
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- CN117816728A CN117816728A CN202410080883.5A CN202410080883A CN117816728A CN 117816728 A CN117816728 A CN 117816728A CN 202410080883 A CN202410080883 A CN 202410080883A CN 117816728 A CN117816728 A CN 117816728A
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- polygonum capitatum
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- arsenic
- heavy metal
- contaminated soil
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- 241000764065 Persicaria capitata Species 0.000 title claims abstract description 99
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 67
- 239000002689 soil Substances 0.000 title claims abstract description 67
- 238000005067 remediation Methods 0.000 title claims description 12
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 61
- 229910052718 tin Inorganic materials 0.000 claims abstract description 61
- 229910052785 arsenic Inorganic materials 0.000 claims abstract description 60
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 claims abstract description 60
- 241000196324 Embryophyta Species 0.000 claims description 61
- 239000011135 tin Substances 0.000 claims description 56
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 14
- 239000011159 matrix material Substances 0.000 claims description 14
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 10
- 229910052804 chromium Inorganic materials 0.000 claims description 10
- 239000011651 chromium Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 9
- 229910052793 cadmium Inorganic materials 0.000 claims description 9
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 9
- 239000010949 copper Substances 0.000 claims description 9
- 239000011133 lead Substances 0.000 claims description 9
- 229910052725 zinc Inorganic materials 0.000 claims description 9
- 239000011701 zinc Substances 0.000 claims description 9
- 238000000605 extraction Methods 0.000 claims description 7
- 229910052759 nickel Inorganic materials 0.000 claims description 7
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 230000003902 lesion Effects 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 16
- 238000009825 accumulation Methods 0.000 abstract description 11
- 239000003795 chemical substances by application Substances 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 2
- YOHSSIYDFWBWEQ-UHFFFAOYSA-N lambda2-arsanylidenetin Chemical compound [As].[Sn] YOHSSIYDFWBWEQ-UHFFFAOYSA-N 0.000 abstract description 2
- 238000003306 harvesting Methods 0.000 description 7
- 230000032258 transport Effects 0.000 description 7
- 239000002893 slag Substances 0.000 description 6
- 231100000419 toxicity Toxicity 0.000 description 6
- 230000001988 toxicity Effects 0.000 description 6
- 238000012546 transfer Methods 0.000 description 6
- 229910052752 metalloid Inorganic materials 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 239000002028 Biomass Substances 0.000 description 4
- 229910052787 antimony Inorganic materials 0.000 description 4
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 4
- 230000029087 digestion Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 150000002738 metalloids Chemical class 0.000 description 4
- 230000008439 repair process Effects 0.000 description 4
- 231100000331 toxic Toxicity 0.000 description 4
- 230000002588 toxic effect Effects 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 241000219050 Polygonaceae Species 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- QZPSXPBJTPJTSZ-UHFFFAOYSA-N aqua regia Chemical compound Cl.O[N+]([O-])=O QZPSXPBJTPJTSZ-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000009616 inductively coupled plasma Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000028327 secretion Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 206010027439 Metal poisoning Diseases 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
- 230000001079 digestive effect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 208000010501 heavy metal poisoning Diseases 0.000 description 1
- 238000002354 inductively-coupled plasma atomic emission spectroscopy Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000000120 microwave digestion Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000000474 nursing effect Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 229910052699 polonium Inorganic materials 0.000 description 1
- HZEBHPIOVYHPMT-UHFFFAOYSA-N polonium atom Chemical compound [Po] HZEBHPIOVYHPMT-UHFFFAOYSA-N 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000009331 sowing Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 229910052714 tellurium Inorganic materials 0.000 description 1
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 description 1
- 229910021642 ultra pure water Inorganic materials 0.000 description 1
- 239000012498 ultrapure water Substances 0.000 description 1
- 230000017260 vegetative to reproductive phase transition of meristem Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/10—Reclamation of contaminated soil microbiologically, biologically or by using enzymes
- B09C1/105—Reclamation of contaminated soil microbiologically, biologically or by using enzymes using fungi or plants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mycology (AREA)
- Biotechnology (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Botany (AREA)
- General Health & Medical Sciences (AREA)
- Microbiology (AREA)
- Molecular Biology (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to the technical field of environmental protection, in particular to an application of polygonum capitatum in repairing heavy metal contaminated soil. The invention provides an application of polygonum capitatum in repairing heavy metal contaminated soil, wherein the contaminated soil comprises at least one of arsenic and tin. According to the invention, natural wild polygonum capitatum plant samples are collected from a heavy metal tailing pond, and the accumulation characteristics of the natural wild polygonum capitatum plant samples on metal-like arsenic and tin are analyzed. The results show that the polygonum capitatum has tolerance and accumulation characteristics to heavy metal arsenic and tin, and the transport coefficient of the polygonum capitatum to arsenic and tin is more than 1.0. Therefore, the polygonum capitatum has a certain accumulation effect on arsenic and tin at the same time, and can be used as a repairing agent for repairing the soil polluted by arsenic, tin or arsenic-tin combined pollution.
Description
Technical Field
The invention relates to the technical field of environmental protection, in particular to an application of polygonum capitatum in repairing heavy metal contaminated soil.
Background
Soil is an important resource for human to survive, and is related to the problems of grains, resources, environment and the like faced by human. The heavy metal elements are enriched in the soil to a certain extent so as to pollute the soil, influence the ecological environment and agricultural production function of the soil and harm the human health.
Arsenic is a Metalloid element (called metaloid in english) in the periodic table of elementsAlso of the same class, between metallic and nonmetallic elements, are boron, silicon, germanium, arsenic, antimony, tellurium and polonium. Metalloids are very similar to metals in some physical properties (e.g., gloss) and chemical properties, but are different from metals in other physical properties (e.g., conductivity). Arsenic, although not metallic, is similar in toxicity to heavy metals and is therefore usually also taken into account when it is said that heavy metals are toxic. Therefore, arsenic (As) and tin (Sn) contamination is also a common heavy metal contamination of soil. The average background value of the world soil arsenic is 15-25 mg kg -1 The average background value of the tin in the soil is 2.6mg kg -1 。
Phytoremediation techniques are repair by plant uptake, plant volatilization and plant stabilization. Plant uptake is the extraction of one or more heavy metals from soil by means of super-accumulating plant roots, which are transferred to the ground and stored, and the heavy metals in the soil are removed by harvesting. Plant volatilization refers to a method for removing pollution by utilizing special substances or microorganisms secreted by plant root systems to convert Se, hg, as and the like in soil into volatile forms. Plant stabilization refers to the process of fixing soil heavy metals by using plant roots. The heavy metals are absorbed and accumulated by root systems or adsorbed on the root system surface, and can be fixed in the rhizosphere through root secretion. By planting super-enriched plants or resistant plants with strong resistance to heavy metals, certain absorption and enrichment capacity and large biomass, harmful elements in soil are gradually extracted, so that the purposes of stabilizing waste residues and controlling migration of heavy metals can be achieved. Therefore, it is very critical to find a suitable super-accumulating plant.
Disclosure of Invention
In view of the above, the technical problem to be solved by the invention is to provide the application of polygonum capitatum in the remediation of heavy metal contaminated soil, wherein the polygonum capitatum has a certain accumulation effect on arsenic and tin at the same time, and can be used as a remediation agent for the remediation of the soil contaminated by arsenic, tin or the combination of arsenic and tin.
The invention provides an application of polygonum capitatum in repairing heavy metal contaminated soil, wherein the contaminated soil comprises at least one of arsenic and tin.
The invention also provides application of the polygonum capitatum serving as a heavy metal contaminated soil restoration functional plant, wherein the contaminated soil comprises at least one of arsenic and tin.
Preferably, the polygonum capitatum is a polygonum capitatum plant which grows well and has no lesions and dry leaves.
Preferably, the matrix for growing the polygonum capitatum contains at least one of arsenic and tin.
Preferably, the matrix for the growth of the polygonum capitatum is a tailing pond and contains cadmium, chromium, lead, arsenic, zinc, copper, nickel and tin.
Preferably, the polygonum capitatum repair of the heavy metal contaminated soil belongs to a plant extraction mode or a plant absorption mode.
Preferably, the transport coefficient of the polygonum capitatum to arsenic and tin is more than 1.0.
The invention also provides a method for repairing heavy metal contaminated soil, which comprises the following steps:
a) Uniformly stirring the polygonum capitatum seeds, and broadcasting the polygonum capitatum seeds in heavy metal contaminated soil; or transplanting the polygonum capitatum seedlings into heavy metal contaminated soil;
the contaminated soil comprises at least one of arsenic and tin;
b) In the current year, the overground parts of the polygonum capitatum plants are harvested by stubble remaining, or the whole polygonum capitatum plants are recovered.
The invention provides an application of polygonum capitatum in repairing heavy metal contaminated soil, wherein the contaminated soil comprises at least one of arsenic and tin. According to the invention, natural wild polygonum capitatum plant samples are collected from a heavy metal tailing pond, and the accumulation characteristics of the natural wild polygonum capitatum plant samples on metal-like arsenic and tin are analyzed. The results show that the polygonum capitatum has tolerance and accumulation characteristics to heavy metal arsenic and tin, and the arsenic content of the overground part of the polygonum capitatum is 106+/-13 mg kg -1 The arsenic content of the underground part is 41.4+/-12.2 mg kg -1 The arsenic content in the growth substrate is 1550+/-292 mg kg -1 The corresponding enrichment coefficient BAF is 6.85×10 -2 Its transport coefficient TF is 2.58, its root concentration coefficient BCF is 2.67×10 -2 Indicates that the polygonum capitatum has arsenicA certain enrichment and transportation effect; in addition, the tin content of the overground part of the polygonum capitatum is 2.25+/-0.04 mg kg -1 The tin content of the underground part is 1.51+ -0.18 mg kg -1 The tin content in the growth matrix is 170+/-83 mg kg -1 BAF, TF, BCF of each of which is 1.32X10 -2 ，1.50，8.88×10 -3 The tin-enriched and transporting agent also has a certain enrichment and transporting effect on tin. Therefore, the polygonum capitatum has a certain accumulation effect on arsenic and tin at the same time, and can be used as a repairing agent for repairing the soil polluted by arsenic, tin or arsenic-tin combined pollution.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The polygonum capitatum (Polygonum capitatum Buch) -ham. ExD. Don) belongs to perennial herbaceous plants of Polygonaceae and Polygonaceae, has colorful leaves, long flowering period and high ornamental value, and is a good material for slope nursing, ground cover and the like. Distributed in Jiangxi, two lakes, two Guangdong and southwest regions. Polygonum capitatum is used as a drug for Guizhou Miao nationality.
The invention provides an application of polygonum capitatum in repairing heavy metal contaminated soil, wherein the contaminated soil comprises at least one of arsenic and tin. Specifically, the pollution elements in the polluted soil are arsenic and tin.
The invention also provides application of the polygonum capitatum serving as a heavy metal contaminated soil restoration functional plant, wherein the contaminated soil comprises at least one of arsenic and tin. Specifically, the pollution elements in the polluted soil are arsenic and tin.
Preferably, the polygonum capitatum is a polygonum capitatum plant which grows well and has no lesions and dry leaves.
In some embodiments of the invention, the matrix in which the polygonum capitatum grows contains at least one of arsenic and tin.
In some embodiments of the invention, the matrix on which the polygonum capitatum grows is a tailing pond containing cadmium, chromium, lead and metalloid arsenic which are significantly toxic to the organism, and zinc, copper, nickel and tin which are toxic.
In the invention, the polygonum capitatum repair of heavy metal contaminated soil belongs to a plant extraction (or plant absorption) mode. Plant extraction is to extract one or more heavy metals from soil by using accumulated plant root system, transfer the heavy metals to the overground part, and remove the heavy metals in the soil by harvesting. In the invention, the method for restoring the soil polluted by heavy metal by the polygonum capitatum is different from a plant volatilization method and a plant stabilization (plant blocking) method. The plant blocking means that heavy metals are absorbed and accumulated or adsorbed on the root system surface by utilizing plant root systems, or are fixed in rhizosphere soil through root secretion, so that the mobility and toxicity of the heavy metals are reduced.
The invention also provides a method for repairing heavy metal contaminated soil, which comprises the following steps:
a) Uniformly stirring the polygonum capitatum seeds, and broadcasting the polygonum capitatum seeds in heavy metal contaminated soil; or transplanting the polygonum capitatum seedlings into heavy metal contaminated soil;
the contaminated soil comprises at least one of arsenic and tin;
b) In the current year, the overground parts of the polygonum capitatum plants are harvested by stubble remaining, or the whole polygonum capitatum plants are recovered.
The polygonum capitatum is an annual plant, is sown at the end of 2 months to 3 months in general, is transplanted in seedlings for 4 months to 5 months, is harvested once in 8 months, and is harvested for the second time in 10 months.
In some embodiments of the invention, step B) specifically comprises:
harvesting the overground part of the polygonum capitatum plant by first stubble remaining in 8 months of the current year, and harvesting the overground part of the polygonum capitatum plant by second stubble remaining in 10 months of the current year;
or planting for 10 months in the same year to recover the whole polygonum capitatum plant.
In some embodiments of the invention, in step B), harvesting the aerial parts of the polygonum capitatum plants, or recovering the whole polygonum capitatum plants, after stubble harvesting, further comprises:
and sowing the polygonum capitatum seeds or transplanting polygonum capitatum seedlings.
According to the invention, the content of 7 heavy metals of copper, cadmium, chromium, zinc, lead, tin and arsenic in the polygonum capitatum plant body is measured by an inductively coupled plasma atomic emission spectrometry, and the enrichment effect and tolerance of the plant to different heavy metals are studied. Research results show that the polygonum capitatum has different enrichment effects and tolerance on different metals, and the enrichment effects of different parts of the plant body are different.
In the invention, the transfer coefficients of the polygonum capitatum to arsenic and tin are both more than 1.0, and specifically not less than 1.5.
The research of the invention shows that the polygonum capitatum has tolerance and accumulation property to heavy metal arsenic and tin, and the arsenic content of the overground part of the polygonum capitatum is 106+/-13 mg kg -1 The arsenic content of the underground part is 41.4+/-12.2 mg kg -1 The arsenic content in the growth substrate is 1550+/-292 mg kg -1 The corresponding enrichment coefficient BAF is 6.85×10 -2 Its transport coefficient TF is 2.58, its root concentration coefficient BCF is 2.67×10 -2 The polygonum capitatum has a certain arsenic enrichment and transportation effect; in addition, the tin content of the overground part of the polygonum capitatum is 2.25+/-0.04 mg kg -1 The tin content of the underground part is 1.51+ -0.18 mg kg -1 The tin content in the growth matrix is 170+/-83 mg kg -1 BAF, TF, BCF of each of which is 1.32X10 -2 ，1.50，8.88×10 -3 The tin-enriched iron alloy has a certain enrichment effect on tin.
The source of the raw materials used in the present invention is not particularly limited, and may be generally commercially available.
In order to further illustrate the invention, the application of the polygonum capitatum provided by the invention in the remediation of heavy metal contaminated soil is described in detail below with reference to the examples, but the application is not to be construed as limiting the scope of the invention.
The polygonum capitatum in the embodiment of the invention is obtained from a tailing pond area of the old city in Yunnan province, and the geographic positions of the polygonum capitatum are 103.144847 in east longitude, 23.313903 in north latitude and 1905.3m in elevation. The grown substrate is tailing sand which mainly contains cadmium, chromium, lead and metalloid arsenic with obvious biological toxicity, and zinc, copper, nickel and tin with toxicity, so that the plants are not subjected to any toxic phenomenon, have good growth vigor and larger biomass, and are distributed on the surface of a tailing pond in a piece mode. And respectively collecting the overground part and the underground part of the polygonum capitatum and the grown matrix, and analyzing the heavy metal enrichment effect and the tolerance of the polygonum capitatum. The selected plants have certain biomass, good growth vigor and no heavy metal poisoning property, and the polygonum capitatum meets the requirements.
Example 1
The application research of the polygonum capitatum for repairing heavy metals comprises the following steps:
1) Collection of plant samples and soil samples:
selecting 5 current annual plants (planting the whole polygonum capitatum plants harvested in 10 months of the current year) with good growth and no lesions and dry leaves in a polygonum capitatum growth distribution area, completely removing residues at the root, completely collecting the whole plant, and sealing a plurality of collected samples with a plastic sample bag for later use; and (3) removing 5cm thick covering soil on the root surface of the plant while collecting a plant sample, taking soil with a section of 5-30 cm, uniformly mixing the soil collected at multiple points, and sealing for later use.
The matrix for the growth of the polygonum capitatum is a tailing pond, and contains cadmium, chromium, lead and metalloid arsenic with obvious biological toxicity, and zinc, copper, nickel and tin with toxicity.
2) Pretreatment of plant samples: the collected plant samples are washed clean with tap water, then washed clean with deionized water, the underground part and the overground part are separated, treated for 30min at 100 ℃, then dried to constant weight at 50 ℃, and the dried samples are crushed by a mortar and sealed for standby.
3) Pretreatment of slag samples: the slag sample is collected, large gravels and plant residues possibly existing are firstly removed, then the slag sample is dried in the shade to constant weight under the room temperature condition, and then the dried slag sample is crushed by a ball mill and all the slag sample passes through a 2mm screen, and the slag sample is sealed for standby.
4) Digestion and determination of plant samples: accurately weighing 0.5g (accurate to +/-0.0001 g) of each of the aerial part and the underground part, carrying out microwave digestion according to the program of multi-element determination in national food safety standard of GB 5009.268-2016, and determining the content of copper, cadmium, chromium, zinc, lead, tin and arsenic by utilizing an inductively coupled plasma atomic emission spectrometer.
5) Digestion and determination of soil samples: accurately weighing 1g (accurate to +/-0.0001 g) of the treated soil sample, placing in a polytetrafluoroethylene crucible (provided with 3 groups of parallel samples), adding 5mL of aqua regia, capping, digesting on an electric hot plate, and controlling the temperature at 120 ℃; repeatedly adding aqua regia until the liquid property is not changed any more according to digestion conditions, uncovering, and properly cooling to 100 ℃; then repeatedly adding 1mL hydrofluoric acid (high-grade pure), and repeatedly shaking the cup body to achieve the purpose of silicon flying; finally, 1mL of perchloric acid (superior purity) is added for further digestion until the solution is clear and colorless, and the temperature is raised to 165 ℃ to expel acid until the solution is nearly dry. The digested sample was completely transferred to a 50mL volumetric flask with ultrapure water to determine the volume. The contents of copper, chromium, nickel, zinc, lead, cadmium, arsenic and tin (average value of 3 groups of parallel samples) in the digestive liquid are measured by using an inductively coupled plasma atomic emission spectrometer, and the data are shown in table 1.
TABLE 1 Metal content of different parts of Polygonum capitatum (mg kg) -1 ) And enrichment factor BAF, transport factor TF, concentration factor BCF
The enrichment factor BAF of a plant is defined as: the ratio of the content of a certain heavy metal in the aerial parts of the plant body to the content of the heavy metal in the growing substrate. The coefficient can reflect the accumulation capacity of the plant on heavy metals, and the larger the enrichment coefficient is, the stronger the enrichment capacity is. In particular, the larger the enrichment coefficient of the overground parts of plants is, the more favorable the extraction and repair of the plants is, because the overground biomass is easier to harvest. The enrichment coefficient of the overground parts of the plants is larger than 1, which means that the content of certain heavy metals in the overground parts of the plants is larger than the concentration of the heavy metals in the growing matrix, and the overground parts of the plants are an important characteristic of the super-enriched plants, which is different from common plants and has the accumulation of the heavy metals.
The ratio of the content of certain heavy metals in the aerial parts and the roots of the plants is called a transfer coefficient TF, the distribution condition of the heavy metals of the plants can be reflected, the higher the transfer coefficient is, the more favorable the extraction of the heavy metals from the aerial parts is, and on the contrary, the worse the enrichment effect is.
The ratio of the content of a certain heavy metal in the root of the plant body to the content of a heavy metal in the growth matrix is called a concentration coefficient BCF, when the concentration coefficient BAF and the transport coefficient TF are lower, the concentration coefficient is higher, which shows that the plant body has better tolerance to the heavy metal, and the heavy metal in the growth matrix is mainly concentrated in the root of the plant body and is the standard of the tolerance of the plant body.
As can be seen from Table 1, the polygonum capitatum has better transport and enrichment effects on copper, nickel, zinc, lead, cadmium, arsenic, tin and chromium elements, and has TF coefficients of more than 1.0, and some TF coefficients are even higher than 3, such as chromium. Arsenic content of overground part of Polygonum capitatum is 106+ -13 mg kg -1 The arsenic content of the underground part is 41.4+/-12.2 mg kg -1 The arsenic content in the growth substrate is 1550+/-292 mg kg -1 The corresponding enrichment coefficient BAF is 6.85×10 -2 Its transport coefficient TF is 2.58, its root concentration coefficient BCF is 2.67×10 -2 The polygonum capitatum has a certain arsenic enrichment and transportation effect; in addition, the tin content of the overground part of the polygonum capitatum is 2.25+/-0.04 mg kg -1 The tin content of the underground part is 1.51+ -0.18 mg kg -1 The tin content in the growth matrix is 170+/-83 mg kg -1 BAF, TF, BCF of each of which is 1.32X10 -2 ，1.50，8.88×10 -3 The tin-enriched and transporting agent also has a certain enrichment and transporting effect on tin.
However, according to the accumulated characteristics and health risk evaluation of the polygonum capitatum on the antimony in the soil in the literature, hu Xia, wang Li, tian Yi, liu Ji and Yang Aijiang and the description of the abstract part of the Chinese inorganic analytical chemistry, volume 12, 3 rd, 40-47 ", the transfer coefficient of the polygonum capitatum on the antimony is 0.13-0.24 (average value is 0.18), which indicates that the transfer capability of the polygonum capitatum on the antimony from the root to the ground is weaker.
According to the analysis of the enrichment results of the polygonum capitatum on different heavy metals, the polygonum capitatum can be seen to have a certain accumulation effect on arsenic and tin at the same time, has application potential on the soil remediation of arsenic pollution or tin pollution or the combined pollution of arsenic and tin, and can be used as a soil remediation functional plant of heavy metal polluted soil.
According to the invention, after the polygonum capitatum is planted for a certain period of time, the whole plant is recovered, and then seedlings are sown or transplanted, so that the content of heavy metals in the polluted soil is reduced by using the polygonum capitatum.
The above description of the embodiments is only for aiding in the understanding of the method of the present invention and its core ideas. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. Use of polygonum capitatum in the remediation of heavy metal contaminated soil comprising at least one of arsenic and tin.
2. The use of polygonum capitatum as a functional plant for the remediation of heavy metal contaminated soil comprising at least one of arsenic and tin.
3. The use according to claim 1 or 2, characterized in that the polygonum capitatum is a good growing polygonum capitatum plant without lesions and dry leaves.
4. The use according to claim 1 or 2, characterized in that the matrix in which the polygonum capitatum grows contains at least one of arsenic and tin.
5. The use according to claim 1 or 2, characterized in that the matrix on which the polygonum capitatum grows is a tailing pond containing cadmium, chromium, lead, arsenic, zinc, copper, nickel and tin.
6. The use according to claim 1 or 2, characterized in that the remediation of heavy metal contaminated soil by polygonum capitatum belongs to the plant extraction mode or the plant absorption mode.
7. The use according to claim 1 or 2, characterized in that the transport coefficient of polygonum capitatum for arsenic and tin is greater than 1.0.
8. The remediation method of the heavy metal contaminated soil comprises the following steps of:
a) Uniformly stirring the polygonum capitatum seeds, and broadcasting the polygonum capitatum seeds in heavy metal contaminated soil; or transplanting the polygonum capitatum seedlings into heavy metal contaminated soil;
the contaminated soil comprises at least one of arsenic and tin;
b) In the current year, the overground parts of the polygonum capitatum plants are harvested by stubble remaining, or the whole polygonum capitatum plants are recovered.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006159181A (en) * | 2004-11-09 | 2006-06-22 | Mitsubishi Materials Corp | Method for removing and recovering heavy metal in soil |
| US20070083942A1 (en) * | 2003-04-02 | 2007-04-12 | Navarro Avino Juan P | Biological contamination-removal method |
| CN109226218A (en) * | 2018-10-09 | 2019-01-18 | 中山大学 | The application of gymnema sylvestre in the repair of heavy metal contaminated soil |
| CN114682623A (en) * | 2022-03-31 | 2022-07-01 | 云南省生态环境科学研究院 | Application of sweet clover in repairing heavy metal contaminated soil |
| CN115777272A (en) * | 2022-08-24 | 2023-03-14 | 云南农业大学 | Application of polygonum serissoides as dominant plant in vegetation recovery on tin tailings and method |
-
2024
- 2024-01-19 CN CN202410080883.5A patent/CN117816728A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070083942A1 (en) * | 2003-04-02 | 2007-04-12 | Navarro Avino Juan P | Biological contamination-removal method |
| JP2006159181A (en) * | 2004-11-09 | 2006-06-22 | Mitsubishi Materials Corp | Method for removing and recovering heavy metal in soil |
| CN109226218A (en) * | 2018-10-09 | 2019-01-18 | 中山大学 | The application of gymnema sylvestre in the repair of heavy metal contaminated soil |
| CN114682623A (en) * | 2022-03-31 | 2022-07-01 | 云南省生态环境科学研究院 | Application of sweet clover in repairing heavy metal contaminated soil |
| CN115777272A (en) * | 2022-08-24 | 2023-03-14 | 云南农业大学 | Application of polygonum serissoides as dominant plant in vegetation recovery on tin tailings and method |
Non-Patent Citations (5)
| Title |
|---|
| SONG XIANG-BIN等: "Heavy Metal Contents and Accumulation Characteristic of Dominant Plants in Tin Mining Wasteland of Gejiu city, Yunnan, China", 5TH INTERNATIONAL CONFERENCE ON ADVANCED DESIGN AND MANUFACTURING ENGINEERING, 31 December 2015 (2015-12-31), pages 801 - 808 * |
| 刘灵飞等: "喀斯特山区晴隆锑矿不同介质砷锑铋污染特征研究＊", 贵州师范大学学报(自然科学版), no. 4, 15 August 2014 (2014-08-15), pages 83 - 87 * |
| 杨淼: "自然生态恢复过程中锑矿尾砂的植物生长适宜性评价", 中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑, no. 2, 15 February 2023 (2023-02-15), pages 027 - 278 * |
| 王丽;杨爱江;邓秋静;胡霞;薛洪其;陈蔚洁;李聪;: "贵州独山锑矿区土壤-头花蓼系统中重金属的分布特征", 生态学杂志, no. 12, 1 September 2017 (2017-09-01), pages 3445 - 3552 * |
| 陈秋平等: "锑矿区土壤中Ａｓ、Ｓｂ和Ｂｉ的污染与植物累积特征", 贵州农业科学, no. 9, 15 September 2014 (2014-09-15), pages 236 - 240 * |
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