Remediation method of heavy metal contaminated acidic soil

A technology of acidic soil and repair method, which is applied in the field of environment, and can solve problems such as long repair period, underdeveloped root system, and soil biological property damage

Inactive Publication Date: 2015-04-08
广州时代环境治理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Technical problem to be solved: For the deficiencies in the methods of different heavy metal polluted acidic soils, such as phytoremediation, because the plants used in phytoremediation are usually not well-developed root system, only surfac

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] At room temperature, firstly, mix heavy metal-polluted acidic soil (labeled 1#, pH 4.0) with calcareous soil at a mass ratio of 1:0.1 and let it stand for 2 hours; secondly, add urea phosphate, chitin, and biochemical yellow to the mixed soil A mixture of humic acid and alginic acid, the mass ratio of the total amount of the mixture to calcareous soil is 1:0.01, and the contents of each component of the mixed species added are: 25 parts of urea phosphate, 18 parts of chitin, and 10 parts of biochemical yellow Humic acid and 5 parts of alginic acid, stirred and mixed for 3 hours; finally, add Bacillus rice bran solution cultivated for 24 hours in advance, in which Bacillus is 1mL seed solution with a fixed concentration, and the concentration of rice bran solution is 2 g / L, after mixing evenly stand still. After standing for 2 days, the heavy metal-contaminated soil was treated, and the concentration of heavy metals leached from the contaminated soil was tested by atomic...

Embodiment 2

[0023] At room temperature, firstly, mix heavy metal-polluted acidic soil (labeled 1#, PH 4.0) with calcareous soil at a mass ratio of 1:0.95 and let it stand for 2 hours; secondly, add urea phosphate, chitin, and biochemical yellow to the mixed soil A mixture of humic acid and alginic acid, the mass ratio of the total amount of the mixture to calcareous soil is 1:0.1, and the contents of each component of the mixed species are: 35 parts of urea phosphate, 25 parts of chitin, and 25 parts of biochemical yellow Humic acid and 15 parts of alginic acid were mixed and allowed to stand for 3 hours; finally, the rice bran solution of bacillus bacillus that had been cultivated for 72 hours in advance was added, in which the bacillus was 1 mL of seed solution with a fixed concentration, and the concentration of the rice bran solution was 35 g / L. stand still. After standing for 7 days, the heavy metal-contaminated soil was treated, and the concentration of heavy metals leached from the...

Embodiment 3

[0025] At room temperature, first, mix heavy metal-polluted acidic soil (labeled 1#, PH 4.0) with calcareous soil at a mass ratio of 1:0.5 and let it stand for 2 hours; secondly, add urea phosphate, chitin, and biochemical yellow to the mixed soil A mixture of humic acid and alginic acid, the mass ratio of the total amount of the mixture to the calcareous soil is 1:0.5, and the contents of each component of the mixed species are: 25 parts of urea phosphate, 15 parts of chitin, and 15 parts of biochemical yellow Humic acid and 10 parts of alginic acid, stirred and mixed for 3 hours; finally, add Bacillus rice bran solution cultivated in advance for 48 hours, in which Bacillus is 1mL seed solution with a fixed concentration, and the concentration of rice bran solution is 20 g / L, after mixing evenly stand still. After standing still for 5 days, the heavy metal-contaminated soil was treated, and the concentration of heavy metals leached from the polluted soil was tested by atomic ...

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Abstract

The invention belongs to the field of soil remediation and discloses a remediation method of heavy metal contaminated acidic soil. The remediation method of heavy metal contaminated acidic soil comprises the following steps: (1) stirring and mixing heavy metal contaminated acidic soil with calcareous soil, and standing the mixed soil for 2 hours; (2) mixing urea phosphate, chitin, biochemical fulvic acid and alginic acid, adding the mixture into the mixed soil, and stirring uniformly; and (3) standing for 3 hours, adding the solution of bacillus and rice bran, and standing. The raw materials adopted by the remediation method are simple, easily available and environment-friendly and can not cause secondary pollution. The remediation method provided by the invention is an environment-friendly method for rapidly and deeply remediating a variety of heavy metal contaminated acidic soil without damaging the biological properties of soil, and the remediation method is suitable for commercial production.

Description

technical field [0001] The invention belongs to the technical field of environment, and relates to a restoration technology of polluted soil, in particular to a restoration method of acidic soil polluted by heavy metals. Background technique [0002] With the rapid development of industrialization and modernization, soil heavy metal pollution has posed a serious threat to the ecological environment and people's health, and has become one of the environmental issues of global concern. The main source of soil heavy metal pollution is man-made pollution, such as sewage irrigation, vehicle exhaust emissions, domestic wastewater discharge, industrial waste, and the application of pesticides and fertilizers. Among the heavy metals, lead, mercury, arsenic, cadmium, and chromium are the most harmful to the human body. These heavy metals cannot be decomposed in water, and their toxicity is amplified after human consumption. They combine with other toxins in the water to form more t...

Claims

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Application Information

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IPC IPC(8): B09C1/00B09C1/08B09C1/10
Inventor 程功弼许滢
Owner 广州时代环境治理有限公司
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