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Soil heavy metal stabilizing agent and preparation method and application thereof

A heavy metal stabilizer, heavy metal technology, applied in the direction of application, soil conditioning materials, chemical instruments and methods, etc., can solve the problems of low adsorption capacity, secondary pollution, and weak stabilization ability of soil heavy metal stabilizers, and achieve low price, Enhanced adsorption capacity, high feasibility effect

Active Publication Date: 2016-06-15
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the invention provides a soil heavy metal stabilizer, the purpose of which is to use the mercapto-containing compound in the food additive as a heavy metal adsorbent, thereby solving the problem that the soil heavy metal stabilizer has less adsorption capacity and stable The technical problems of weak chemical capacity and secondary pollution during use

Method used

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  • Soil heavy metal stabilizing agent and preparation method and application thereof
  • Soil heavy metal stabilizing agent and preparation method and application thereof
  • Soil heavy metal stabilizing agent and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Choose attapulgite as raw material, and activate attapulgite with 1M hydrochloric acid.

[0038]Immerse the activated attapulgite in 50% 3-mercapto-2-butanol solution, wherein the quality of the activated attapulgite is the same as that of 3-mercapto-2-butanol, and soak for 6 hours at a temperature of 25°C , and then dried at a temperature of 70°C to prepare a soil heavy metal stabilizer, which was ground through a 100-mesh sieve for later use. The sulfhydryl group loading (ie mass fraction) in the soil heavy metal stabilizer after preparation is 2%.

[0039] Carry out infrared spectrum analysis to original attapulgite, activated attapulgite, and the prepared soil heavy metal stabilizer, and the obtained infrared spectrum is as follows figure 1 As shown, the three curves from top to bottom are soil heavy metal stabilizer, activated attapulgite, and original attapulgite. It can be seen that the attapulgite composite material after mercapto modification -1 、1635cm -1 、...

Embodiment 2

[0042] Example 1 was repeated with the same steps as described, except that 2-mercapto-3-butanone was used to replace 3-mercapto-2-butanol. The sulfhydryl loading of the soil heavy metal stabilizer after preparation is 1%.

Embodiment 3

[0044] Repeat Example 1 with the same steps as described, except that 3-mercapto-2-butanol is replaced with 8-mercaptomenthone. The sulfhydryl loading of the soil heavy metal stabilizer after preparation is 1.5%.

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Abstract

The invention discloses a soil heavy metal stabilizing agent. The soil heavy metal stabilizing agent comprises activated attapulgite and a heavy metal compounding agent. The heavy metal compounding agent is combined with the activated attapulgite through hydrogen bonds or covalent bonds, so that soil heavy metal is adsorbed by the activated attapulgite and the heavy metal compounding agent cooperatively. The heavy metal compounding agent is one or more of 3-sulfydryl-2-butyl alcohol, 2-sulfydryl-3-butanone, and 8-sulfydryl menthone. The mass fraction of sulfydryl in the soil heavy metal stabilizing agent is 0.5%-10%, and the particle size of the sulfydryl is smaller than 150 micrometers. The invention further discloses a preparation method of the soil heavy metal stabilizing agent and the application of the soil heavy metal stabilizing agent in soil remediation. According to the soil heavy metal stabilizing agent and the preparation method and application thereof, the soil heavy metal stabilizing agent which is neutral in pH value, nontoxic and environmentally friendly is prepared, the heavy metal is stabilized in the soil, the mobility and the biological activity of the heavy metal are reduced, secondary pollution is avoided during soil remediation, and the applicability is higher in soil remediation engineering.

Description

technical field [0001] The invention belongs to the technical field of soil heavy metal pollution control, and more specifically relates to a soil heavy metal stabilizer and its preparation method and application. Background technique [0002] In recent years, with the rapid development of my country's urbanization process and the adjustment of industrial layout, the vigorous development of industry and agriculture, and the mining of mines, soil heavy metal pollution has become more and more serious. As persistent toxic pollutants, heavy metals can enter the soil through different channels and remain in the soil for a long time because they cannot be biodegraded, causing soil pollution and endangering public health and the surrounding environment. [0003] The chemical remediation method has gained widespread attention due to its advantages of stable and thorough treatment effects, and is suitable for the treatment of heavily polluted soils. Existing soil heavy metal stabil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00C09K17/40
CPCB09C1/00C09K17/40
Inventor 陈静王琳玲李鸿博杨蓉
Owner HUAZHONG UNIV OF SCI & TECH
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