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In situ harnessing method for copper-lead composite contaminated soil

A compound pollution and soil technology, which is applied in the field of copper-lead compound polluted soil treatment, can solve the problems of high cost and secondary soil pollution, and achieve the effects of avoiding pollution, promoting root growth, accelerating absorption and enrichment

Inactive Publication Date: 2004-11-10
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, the application of physical and chemical methods often costs a lot of money, and the chemicals used may also cause secondary pollution of the soil

Method used

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  • In situ harnessing method for copper-lead composite contaminated soil
  • In situ harnessing method for copper-lead composite contaminated soil
  • In situ harnessing method for copper-lead composite contaminated soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In the soil environment with copper and lead content of 1435 and 1500 mg / kg, respectively, after applying nitrogen, phosphorus and potassium fertilizers only by traditional methods, the effective copper content of ammonium acetate on the soil surface was 76.7 mg / kg, and the effective lead content of ammonium acetate was 49.0 mg / kg. Plant the fenugreek and harvest the aboveground part after 10 months according to the management methods of common crops. It has been determined that after one season of planting Cerulea, the effective copper content of ammonium acetate on the soil surface was 52.0 mg / kg, a decrease of 24.7 mg / kg; the effective lead content of ammonium acetate was 29.1 mg / kg, a decrease of 19.9 mg / kg. The pH of the rhizosphere of C. chinensis decreased by 0.06, and the content of soluble organic matter in the rhizosphere increased by 0.15mg / kg. Compared with the non-rhizosphere soil, the contents of available copper in ammonium nitrate and available copper in...

Embodiment 2

[0029] In the soil environment with copper and lead content of 1435 and 1500 mg / kg respectively, if the method of applying organic fertilizer is adopted, the effective copper content of ammonium acetate on the soil surface is 78.2 mg / kg, and the effective lead content of ammonium acetate is 50.0 mg / kg. Plant the fenugreek and harvest the aboveground part after 10 months according to the management methods of common crops. It has been determined that after one season of planting Azalea, the effective copper content of ammonium acetate on the soil surface was 58.5 mg / kg, a decrease of 19.7 mg / kg; the effective lead content of ammonium acetate was 38.6 mg / kg, a decrease of 11.4 mg / kg. The pH of the rhizosphere of C. chinensis decreased by 0.07, and the content of soluble organic matter in the rhizosphere increased by 0.13mg / kg. Compared with the non-rhizosphere soil, the contents of available copper in ammonium nitrate and available copper in ammonium acetate increased by 38.3% a...

Embodiment 3

[0033] In the soil environment with a copper content of 1435mg / kg, if the method of applying organic fertilizer and fly ash at the same time is adopted, the effective copper content of ammonium acetate on the soil surface is 71.4mg / kg, and the effective lead content of ammonium acetate is 44.5mg / kg. Plant the fenugreek and harvest the aboveground part after 10 months according to the management methods of common crops. It has been determined that after one season of planting Azalea, the effective copper content of ammonium acetate is 52.0 mg / kg, which can be reduced by 19.4 mg / kg; the effective lead content of ammonium acetate is 30.8 mg / kg, which is reduced by 13.7 mg / kg. The rhizosphere pH decreased by 0.11 and the soluble organic matter content in the rhizosphere increased by 0.14mg / kg. Compared with the non-rhizosphere soil, the available copper content of ammonium nitrate and ammonium acetate increased by 54.0% and 15.6%, respectively. %, the effective lead content of amm...

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Abstract

The invention relates to a locally improving method for copper-lead compound pollution soil, planting purple flower elscholtzia to use their root systems to largely absorb copper-lead pollutants in the soil and transport upward and transfer to parts on the ground, regularly or according to the growth height, reaping and moving away the parts on the ground so as to carry away a large amount of copper-lead pollutants, implementing the local improvement. It has small investment, simple method, no secondary pollution and can conserve water and soil, solidify soil and beautify environment.

Description

technical field [0001] The invention relates to a treatment method for copper-lead compound polluted soil. Background technique [0002] The development of mines, the discharge of industrial "three wastes" and motor vehicle exhaust, the agricultural use of municipal solid waste and sludge, the irrigation of sewage, and the extensive use of herbicides and chemical fertilizers have polluted the soil, water and the atmosphere, among which heavy metal pollution in soil is even more serious. serious. Once heavy metals pollute the soil, it will not only degrade soil fertility, reduce crop yield and quality, deteriorate the water environment, but also endanger human life and health through the food chain. In the farmland soil polluted by heavy metals in my country, the combined pollution of copper and lead is a common phenomenon. Compared with other heavy metal elements, although copper is more toxic and can cause a series of physiological dysfunctions i...

Claims

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Application Information

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IPC IPC(8): B09C1/10
Inventor 杨肖娥彭红云姜理英
Owner ZHEJIANG UNIV
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