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Soil heavy metal pollution in-suit capturing treating method

A heavy metal scavenger, heavy metal technology, applied in the restoration of polluted soil and other directions, can solve the problems of being greatly affected by habitat conditions, long cycle of biological extraction technology, difficult to restore effect, etc., and achieves low economic cost, fast processing speed, Environmental conditions have little effect

Inactive Publication Date: 2016-05-25
SHENZHEN DUOYUAN TUOZHAN ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Biological extraction technology does not disturb the soil and effectively maintains the biological functionality of the soil, but the biological extraction technology has the limitations of long cycle and great influence of habitat conditions
In addition, hyperaccumulator plants are usually only able to target certain heavy metals, and are mainly used in the remediation of mild and single heavy metal pollution areas. It is difficult to achieve the ideal remediation effect for heavy metal pollution treatment of complex and medium pollution levels.

Method used

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  • Soil heavy metal pollution in-suit capturing treating method
  • Soil heavy metal pollution in-suit capturing treating method
  • Soil heavy metal pollution in-suit capturing treating method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] At room temperature, take 50g of granular insoluble starch xanthate and place it in a 0.5L device, immerse the device in a pH-neutral laboratory solution containing copper, lead, zinc, cadmium and mercury, let it stand for 30 minutes, and take it out Determination, heavy metal capture results are shown in the following table:

[0034] Table 1 The trapping results of heavy metals in the laboratory configuration solution (unit: mg / L):

[0035]

[0036] The results of this example show that the device method can quickly and efficiently remove complex heavy metal pollution factors in water, and the removed heavy metal capture products can be further activated for treatment.

Embodiment 2

[0038]At room temperature, take 50g of xanthate cotton and place it in a 0.5L device, and place the device in the center of a 5L beaker; take another 4kg of farmland soil samples containing lead, zinc and cadmium that have passed through a 100-mesh sieve and place it in the beaker, and place the device in the center of the 5L beaker. Buried; Slowly add distilled water to the soil until no more air bubbles, completely immerse the soil and the device; let stand for 48h, take out and measure, the heavy metal trapping results are as follows:

[0039] Table 2 Results of heavy metal capture in farmland soil (unit: mg / kg):

[0040]

[0041] In this example, the soil is a sample with a moderate or higher pollution degree. After 48 hours of capture and treatment of heavy metal elements in the soil sample, the removal rate reaches 67.29% to 82.65%, and the heavy metal pollution factors in the soil are effectively extracted. It should be noted that the content of heavy metal residues ...

Embodiment 3

[0043] At room temperature, take 50g of bagasse cellulose xanthate and place it in a 0.5L device, and place the device in the center of a 5L beaker; take another 4kg of urban soil samples containing copper, lead, zinc and cadmium with a 100-mesh sieve and place them in the beaker. , bury the device; slowly add distilled water to the soil until no more air bubbles, and completely immerse the soil and device; let stand for 24h, take out and measure, the heavy metal trapping results are as follows:

[0044] Table 3 Capture results of heavy metals in farmland soil (unit: mg / kg):

[0045]

[0046] In this example, the soil is a lightly polluted sample. After 24 hours of capture and treatment of heavy metal elements in the soil sample, the removal rate is between 22.27% and 37.20%, which has a significant treatment effect. Compared with the previous example, the removal rate of the farmland sample in this example is lower, which may be due to the high content of residual heavy me...

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Abstract

The invention discloses a soil heavy metal pollution in-suit capturing treating method. The soil heavy metal pollution in-suit capturing treating method comprises following steps: 1) a heavy metal capturing agent is packaged with a permeable device; 2) the permeable device is buried in water-containing polluted soil; 3) the time of the permeable device buried in water-containing polluted soil is determined based on requirements, wherein when the permeable device is buried in soil aqueous solution, reactions such as ion exchange, ion complexation, and ion absorption of heavy metal ions in soil aqueous solution with the heavy metal capturing agent are realized via concentration diffusion, and the heavy metal ions are captured; and 4) the permeable device buried in soil is removed, and the heavy metal capturing agent is removed after capturing heavy metal, so that the heavy metal elements in soil are removed. The soil heavy metal pollution in-suit capturing treating method is capable of removing heavy metal capturing products effectively; operation is simple; soil physicochemical properties are not influenced; soil ecological functions are maintained; no secondary environmental risk is caused; treatment effect is excellent; and cost is low.

Description

technical field [0001] The invention belongs to the field of soil heavy metal pollution control, in particular to an in-situ capture and control method for soil heavy metal pollution. Background technique [0002] Soil is a complex multiphase dynamic open system, mainly including solid phase, liquid phase, gas phase and biological phase. Soil ecological function is the embodiment of the dynamic process in which substances are interconnected and mutually restricted in the multiphase system of soil. A large amount of clay minerals and organic matter contained in the solid phase of the soil can effectively absorb various pollution factors entering its interior, and then accumulate in the soil. When the accumulation exceeds a certain amount, the output of the soil system will be directly or indirectly Harmful to human health, that is, soil pollution. [0003] The situation of soil heavy metal pollution in my country is quite serious. According to statistics from the Ministry ...

Claims

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Application Information

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IPC IPC(8): B09C1/08
CPCB09C1/08B09C2101/00
Inventor 潘胜强
Owner SHENZHEN DUOYUAN TUOZHAN ENVIRONMENTAL PROTECTION TECH CO LTD
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