Phytoremediation method for soil polluted by antimony and application of phytoremediation method

A technology for polluted soil and phytoremediation, applied in the fields of agriculture and environmental protection, can solve the problems of soil structure damage, large amount of engineering, secondary pollution, etc., and achieve the effects of beautifying the environment, enhancing anti-scattering, and low cost

Inactive Publication Date: 2013-01-16
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the above-mentioned physical and chemical remediation techniques require a large amount of engineering, complex operations, and high costs, and are likely to cause damage to the structure of the soil and decrease in fertility, causing secondary pollution.

Method used

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  • Phytoremediation method for soil polluted by antimony and application of phytoremediation method
  • Phytoremediation method for soil polluted by antimony and application of phytoremediation method
  • Phytoremediation method for soil polluted by antimony and application of phytoremediation method

Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0036] Experimental example 1: Antimony adsorption levels of Foxtail under different water cultivation

[0037] A preliminary study was made on the adsorption of antimony by Setaria under different water cultivation methods by pot simulation experiment. Setaria was cultivated at 30%, 60%, and 80% water content respectively. The soil samples were collected from the surface soil (0-20cm) around the coal gangue pile of Xieqiao Coal Mine in Huainan mining area. The soil is yellow brown soil. The content of Sb was 4.35 mg / kg. Air-dry the soil for the experiment naturally, mash it, remove the sundries, pass through a 2mm sieve, put it into a plastic pot (20cm (diameter) × 15cm (height)), 2 plants per pot, wait for the green foxtail to mature in about three months , cutting the aboveground part along the soil surface. Rinse the aerial parts and roots of the foxtail with deionized water, dry and pulverize through 100 mesh. The processed foxtail samples were digested by chemical wet...

experiment example 2

[0040] Experimental example 2: The adsorption level of antimony by foxtail in different periods

[0041] A preliminary study was made on the adsorption levels of antimony by Setaria spp. in different periods by using pot plant simulation experiments. The soil samples were collected from the surface soil (0-20cm) around the gangue pile of Xieqiao Coal Mine in Huainan mining area. The soil is yellow brown soil, and the Sb content in the soil is 4.35mg / kg. The soil used for the experiment was naturally air-dried, crushed, and impurities were removed. After passing through a 2mm sieve, it was put into plastic pots (20cm (diameter) × 15cm (height)), with 2 plants in each pot, and the soil moisture content was adjusted to maintain a constant temperature in the field. About 30-80% of the water volume. After two weeks of balance, select Setaria seedlings with consistent growth and good growth for transplanting, 2 plants per pot, and deionized water from time to time according to the ...

experiment example 3

[0044] Experimental example 3: Remediation of antimony-contaminated soil by using foxtail

[0045] A preliminary systematic study was carried out on the antimony accumulation ability of Setaria spp. by using the pot plant simulation experiment method.

[0046] The soil samples were collected from the surface soil (0-20cm) around the gangue pile of Xieqiao Coal Mine in Huainan mining area. The soil is yellow brown soil, and the Sb content in the soil is 4.35mg / kg. The soil used for the experiment was naturally air-dried, crushed, and impurities were removed. After passing through a 2mm sieve, it was put into a plastic pot (20cm (diameter) × 15cm (height)), and the soil water content was adjusted to maintain 30-80% of the field water holding capacity. %about. After two weeks of balance, select the green foxtail seedlings with consistent growth and good growth for transplanting, 2 plants per pot, and deionized water from time to time according to the water shortage in the pot (S...

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Abstract

The invention provides a phytoremediation method for soil polluted by antimony. The phytoremediation method includes planting plants on soil polluted by antimony, wherein the plants are capable of absorbing antimony in polluted oil. Particularly, green bristlegrass is planted to remedy the soil polluted by antimony, physical-chemical properties of the soil cannot be damaged, secondary pollution is avoided, erosion resistance capacity of the soil can be improved, and dispersion and suspension resistance capacities of the soil can be enhanced. Besides, as the green bristlegrass is high in adaptability, and drought-resistant and poor-resistant, can grow in both acid and alkali soil, has low requirements for field management technology, is convenient to manage in field, and can beautify environment while remedying the polluted soil. Accordingly, the phytoremediation method has the advantages of no secondary pollution, low cost, good remediation effect.

Description

technical field [0001] The invention relates to the technical fields of agriculture and environmental protection, in particular to a method for using phytoremediation of antimony-contaminated soil and its application. Background technique [0002] Soil heavy metal pollution comes from a wide range of sources, mainly including: mining activities, sewage irrigation, unreasonable treatment of industrial solid waste, etc. Existing technologies for remediating heavy metal-contaminated soil include physical remediation and chemical remediation. Physical remediation technology mainly repairs soil through soil improvement method, electrodynamic method and thermal desorption method. Chemical remediation technology mainly includes chemical curing method, chemical leaching method, etc., mainly by adding curing agents, organic matter, chemical reagents, natural minerals and organic chelating agents to the soil to change the soil pH (pH value), redox, etc. Potential (Eh) and other phys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09C1/10
Inventor 周春财刘桂建方婷
Owner UNIV OF SCI & TECH OF CHINA
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