Remediation method of karst mountain mine soil subjected to heavy metal copper pollution

A remediation method, a technology of copper pollution, applied in the remediation of heavy metal copper pollution in the soil of karst mountainous mining areas, and in the field of phytoremediation, can solve the problems of difficult selection of hyperaccumulator plants, achieve strong operability, and facilitate engineering implementation , Improve the effect of soil microenvironment

Inactive Publication Date: 2013-09-18
GUIZHOU NORMAL UNIVERSITY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Screening of Cu hyperaccumulator plants is difficult

Method used

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  • Remediation method of karst mountain mine soil subjected to heavy metal copper pollution
  • Remediation method of karst mountain mine soil subjected to heavy metal copper pollution
  • Remediation method of karst mountain mine soil subjected to heavy metal copper pollution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Yinhe Coal Mine Plot in Hongguo Town, Pan County

[0034] The pH range of the soil reaches 3.04-5.04, which is strongly acidic, and the average copper ion content in the soil is 65.86 mg·kg -1 , exceeding the secondary standard of 50 mg·kg in the soil environmental governance standard (GB15618-1995) -1 , reached the standard of copper pollution. The litter and soil seed banks were taken from the surrounding forests, and then mixed with paspalum, privet and masson pine for restoration.

[0035] The experiment was divided into seven groups, and the experiment started in October. The experimental site was divided into 2m*2m squares, covered with litter, and the thickness was 0cm, 2cm, 2-4cm, 4-6cm, 6-8, 8-10cm , 10-12cm, repeat five times for each thickness. Then sow paspalum seeds, plant privet privet seedlings for one to two years, and pine for one to two years.

[0036] Water every three days after sowing, and stop artificial watering after two weeks. Start one ...

Embodiment 2

[0041] Sample plot of polluted area of ​​coal mine tailings pond in Maiping Township, Huaxi, Guiyang

[0042] The experimental site is copper-contaminated soil around the abandoned coal mine in Maiping Township, Huaxi District, Guiyang City, Guizhou Province. The pH range of the soil reaches 3.25-5.56, which is strongly acidic, and the average copper ion content in the soil is 70.12 mg·kg -1 , exceeding the secondary standard of 50 mg·kg in the soil environmental governance standard (GB15618-1995) -1 , reached the standard of copper pollution. The mixed plants for this are paspalum, privet, and masson pine. The experimental results showed that Paspalum had hyperaccumulation ability to soil copper pollution, and Ligustrum japonica and Pinus massoniana were tolerant to soil copper pollution. Among them, the average value of copper content absorbed by the aerial parts of paspalum was 1223.412mg·kg -1 . The enrichment factor reaches 1.1-2.4. One year after the restoration ...

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Abstract

The invention relates to the technical field of phytoremediation of heavy metal pollution in environment, in particular relates to the technical field of remediation of karst mountain mine soil subjected to heavy metal copper pollution, specifically a remediation method of karst mountain mine soil subjected to heavy metal copper pollution. The remediation method comprises the following steps: planting ditch millet, ligustrun lucidum and masson pine in the soil subjected to heavy metal copper pollution, harvesting and ashing the herbaceous plant in the ditch millet, ligustrun lucidum and masson pine at a fixed period, and increasing the diversity of species by using ligneous plants. The ditch millet, ligustrun lucidum and masson pine are used for modifying the region subjected to heavy metal copper pollution, the whole production process is free from special management, so that the cost is low and the operability is strong, and meanwhile, the landscaping level of the region is improved, the seeding and management are simple, and the engineering implementation can be performed conveniently.

Description

technical field [0001] The invention relates to the technical field of phytoremediation of heavy metal pollution in the environment, in particular to the technical field of remediation of soil polluted by heavy metal copper in karst mountain mining areas, and specifically relates to a method for remediation of soil heavy metal copper pollution in karst mountain mining areas. [0002] Background technique [0003] A series of ecological and environmental problems caused by the development of mineral resources in the west - the destruction of surface vegetation and soil, land desertification, and pollution of surface water have made the local ecosystem more fragile, with reduced biodiversity and serious ecological reverse succession. [0004] The adoption of phytoremediation technology is a feasible method in line with the natural and economic conditions of the karst mountain mining area in Guizhou. Among them, for phytoremediation, finding suitable hyperaccumulator plants, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
Inventor 龙健
Owner GUIZHOU NORMAL UNIVERSITY
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