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A passivator for remediating soil heavy metal CD pollution and preparation method thereof

A technology for soil remediation and passivation agents, applied in chemical instruments and methods, soil conditioning materials, applications, etc., can solve the problems of poor passivation remediation effect, difficult to use on a large scale, complex synthesis process, etc., to make up for the passivation effect. The effect of poor, small application amount and simple synthesis process

Active Publication Date: 2021-03-16
广东省地质实验测试中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, most of the soil heavy metal ion passivators used at home and abroad are mainly organic collectors containing sulfur and nitrogen or natural clay minerals and their mixed materials. Although the passivation repair effect of the material is very good, the price is generally expensive, and the synthesis process is very complicated, so it is difficult to use on a large scale, and the simple clay minerals, such as montmorillonite, wollastonite, attapulgite, etc. Although the synthesis process of passivation materials is simple and the cost of use is low, the passivation repair effect is poor, and often requires a very large amount of application to achieve an obvious passivation effect

Method used

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  • A passivator for remediating soil heavy metal CD pollution and preparation method thereof
  • A passivator for remediating soil heavy metal CD pollution and preparation method thereof
  • A passivator for remediating soil heavy metal CD pollution and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0042]A passivation agent for repairing soil heavy metal CD contaminated, which is made of raw materials of the following weight parts:

[0043]

[0044]The above-mentioned method for repairing a passivation agent contaminated with soil heavy metal CD contamination, which includes the following steps:

[0045]Step 1, the treatment of celite: placed the formulation amount of diatomaceous earth into the scrubber, the water adjustment quality concentration is 35%, stirred well, then adding the weight of hexagochrosphate in a mass concentration of 0.5% to continue scrub 30 minutes, and then The scrubbing product was diluted under stirring to 10%, and then 100 mesh sieves to remove weed, large granular quartz and palm, and then static precipitate, and then filtered the precipitate and dried, pulverized And grinding 200 mesh sieves to obtain a treated diatomaceous earth; in this example, the temperature of the drying is 105 ° C;

[0046]Step 2, the treatment of montmorillonite: Put the formal amount ...

Embodiment 2

[0053]A passivation agent for repairing soil heavy metal CD contaminated, which is made of raw materials of the following weight parts:

[0054]

[0055]The above-mentioned method for repairing a passivation agent contaminated with soil heavy metal CD contamination, which includes the following steps:

[0056]Step 1, the treatment of diatomite: put the formulation amount of diatomaceous earth in the scrubber, the water adjustment quality concentration is 30%, stirred well, then adding the weight of the mass concentration of 0.3% to the sodium hexamphosphate continues to scrub 20 minutes, and then The scrubbing product was diluted to a mass concentration of 7% under stirring, and then over 80 mesh sieve to remove weed, large granular quartz and long stone, and then deprecated, and then filtered the precipitate and pulverized. And grinding 180 mesh sieves, obtained after treatment; in this example, the temperature of drying is 100 ° C;

[0057]Step 2, the treatment of montmorillonite: placing the...

Embodiment 3

[0064]A passivation agent for repairing soil heavy metal CD contaminated, which is made of raw materials of the following weight parts:

[0065]

[0066]The above-mentioned method for repairing a passivation agent contaminated with soil heavy metal CD contamination, which includes the following steps:

[0067]Step 1, the treatment of celite: placed the formulation amount of diatomaceous earth in the scrubber, the water adjustment quality concentration is 40%, stirred well, then adding the weight of the mass concentration of 0.8% to six-smented sodium hexamphosphate continues to scrub 40 min, and then The scrubbing product was diluted to a mass concentration of 13%, and then the weed, large granular quartz and palm were removed, and then the precipitate was deposited, and the precipitate was filtered and pulverized. And grinding 220 mesh sieves, obtained after the treatment of diatomaceous earth; in this example, the temperature of the drying was 110 ° C;

[0068]Step II. Processing of montmoril...

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Abstract

The invention relates to the technical field of soil passivating and repairing materialsr, in particular to a passivator for repairing soil heavy metal Cd pollution and a preparation method thereof. The passivator for repairing the soil heavy metal Cd pollution is prepared from fly ash, diatomite, montmorillonite and quick lime, industrial solid waste fly ash generated by coal combustion is used as a main body material synthesized by the passivator ; clay mineral diatomite and montmorillonite are used as auxiliary materials for synthesis of the passivator; quicklime is used as an accelerant for synthesis of the passivator. The four materials are uniformly mixed according to a certain composition ratio and then a chemical thermal compounding reaction is performed and then the passivator forrepairing soil heavy metal Cd pollution can be obtained; the prepared passivator is low in price, simple in synthesis process, easy to produce in large scale, convenient to apply and popularize on alarge scale, small in application amount and excellent in passivating and repairing effect, and the environment-friendly concept of treating pollution with waste is achieved through recycling of industrial solid waste.

Description

Technical field[0001]The present invention relates to the technical field of passivation repair materials for soil, and in particular to a passivation agent for repairing soil heavy metal CD contamination and a preparation method thereof.Background technique[0002]At present, with the continuous development of my country's social economy, environmental issues are increasing, especially soil weight metal pollution problems, in order to solve this problem, various repair materials and repair techniques for soil heavy metal pollution continue Found and put into use. At present, China and abroad is mainly carried out from two aspects, one is to try to remove soil repair technologies removed from contaminated soil, including heavy metal pollution soil heat transfer, chemical collapse, electric mechanics repair and Plant extraction, etc., by increasing the solubility and mobility of heavy metals, the ultra-standard heavy metal in the soil is extracted, and the common characteristics of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/08C09K101/00
CPCC09K17/08C09K2101/00
Inventor 李媛媛江海燕曹鹏朱凰榕冯先翠刘文华李展强焦洪鹏陈亚刚
Owner 广东省地质实验测试中心
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