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A kind of soil heavy metal deactivator and preparation technology thereof

A heavy metal passivator and preparation technology, which is applied in the field of contaminated soil remediation, can solve the problems of inconvenient operation for workers, secondary soil damage, hardening, etc., and achieve the effect of improving practicability, working effect and environmental friendliness

Inactive Publication Date: 2021-03-23
四川省西南大地集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing commonly used restoration projects mainly use hydraulic materials such as cement, lime, and gypsum as stabilizers. After this type of material is added to the soil, the amount added must be strictly controlled. Too much added amount will cause soil hardening and compaction, which is harmful to the soil. Cause secondary injury, so it is not convenient for workers to actually operate, reducing work efficiency

Method used

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  • A kind of soil heavy metal deactivator and preparation technology thereof
  • A kind of soil heavy metal deactivator and preparation technology thereof
  • A kind of soil heavy metal deactivator and preparation technology thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The invention discloses a preparation process of a soil heavy metal passivator, which comprises the following preparation process:

[0049] S1: Preparation of modified carrier filler: Mix 51% deionized water, 3% anionic surfactant and 6% nonionic surfactant, then stir at 35°C and 1000r / min for 20min; then add 40 % biochar, and stirred under the condition of 1500r / min for 30min; finally, the mixture was dried at room temperature, and ground and sieved to obtain a modified carrier filler with a particle size of 100 microns;

[0050] Preparation of bio-improvement agent: 14% of Aspergillus niger, 6% of mycorrhizal fungi, 6% of Streptomyces, 6% of Pseudomonas azogenes, 6% of Delftia acidovorans, 40% of After the agent and 22% deionization are mixed evenly, the bio-improvement agent is prepared;

[0051] The nutritional agent comprises the following components in weight percentage: 30% of peptone, 40% of pH regulator, 6% of sodium chloride, 1% of magnesium sulfate and 23% o...

Embodiment 1

[0061] The difference between Examples 10-13 and Example 1 is that the nutrient includes the following components in weight percent:

[0062]

[0063] The difference between Examples 14-17 and Example 1 is that the pH regulator includes the following raw materials in weight percent:

[0064]

[0065]

[0066] The difference between Examples 18-21 and Example 1 is that the modified carrier filler comprises the following components in weight percent:

[0067]

[0068] The difference between Embodiment 22-25 and Embodiment 1 is that the particle size of modified carrier filler and soil heavy metal deactivator is as shown in the table below:

[0069]

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PUM

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Abstract

The invention relates to a soil heavy metal passivator and a preparation technology thereof. The soil heavy metal passivator is prepared from 30-40 wt% of a modified carrier filler, 20-24 wt% of a biological improver, 10-14 wt% of polyacrylic acid gel, 3-5 wt% of a silane coupling agent, 1-3 wt% of a dispersant, and the balance of deionized water. The biological improver is loaded by adopting themodified carrier filler, and the modified carrier filler is wrapped with a layer of the polyacrylic acid gel, so the heavy metal passivator has a slow release effect, the passivator can release the biological improver loaded in the filler according to the change of the external temperature, pH value, illumination and other conditions when used, and the soil heavy metal passivator avoids secondarydamage to soil due to excessive addition of the passivator when used, thereby workers can conveniently and practically apply the soil heavy metal passivator, and the working efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of contaminated soil remediation, in particular to a soil heavy metal passivator and a preparation process thereof. Background technique [0002] Heavy metal pollution in soil is relatively common and is a serious problem facing our country at present. The pollution mainly comes from pesticides, atmospheric deposition, sewage, etc. The treatment process is divided into two categories: engineering treatment measures and physical and chemical restoration. Engineering treatment measures mainly include: guest soil, soil replacement, topsoil removal and deep plowing; physical and chemical restoration mainly includes solidification / stabilization, electrodynamic restoration, complexation leaching, steam extraction, redox, agricultural restoration, and biological restoration Wait. [0003] The existing commonly used restoration projects mainly use hydraulic materials such as cement, lime, and gypsum as stabilizers....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/40C09K101/00
CPCC09K17/40C09K2101/00
Inventor 徐乙吴建军马来亚
Owner 四川省西南大地集团有限公司
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