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Step releasing type solidifying stabilizing remediating method for heavy metal polluted soil

A technology of polluted soil and remediation method is applied in the field of solidification and stabilization remediation of step-release heavy metal polluted soil, which can solve the problems of high re-treatment cost, heavy metal infiltration, and short stabilization time, and achieves low treatment cost, low price, and time. long effect

Active Publication Date: 2018-10-12
HEBEI YUHUAN ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main factors restricting the stabilization and restoration of heavy metal-contaminated soil are cost and effect. After adding stabilizers, the stabilization time is short, and heavy metal penetration will occur after a short time, causing pollution again, and the cost of re-treatment is high.

Method used

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  • Step releasing type solidifying stabilizing remediating method for heavy metal polluted soil
  • Step releasing type solidifying stabilizing remediating method for heavy metal polluted soil
  • Step releasing type solidifying stabilizing remediating method for heavy metal polluted soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A commercial land in Guangdong was polluted by heavy metals, and the key pollutants were copper, cadmium, lead, nickel, and zinc. The soil polluted by heavy metals was taken for testing. The test results are shown in Table 1.

[0030] Excavate and sieve the detected contaminated soil, then divide it into four equal parts, and transport it to the curing, stabilization and restoration workshop for stabilization treatment;

[0031] The first contaminated soil stabilization treatment method mainly includes the following steps:

[0032] (1) Preparation of ladder release control agent

[0033] Dilute pure acrylic acid liquid 20 times with deionized water, called base liquid A;

[0034] Dissolve pure cellulose powder in deionized water at 58-62°C to make a cellulose suspension for later use, the weight ratio of the cellulose powder to deionized water is 2:25; add to the cellulose suspension Add fly ash and zeolite to prepare base liquid B, the weight ratio of the cellulose s...

Embodiment 2

[0043] The second contaminated soil stabilization treatment method mainly includes the following steps:

[0044] (1) Preparation of ladder release control agent

[0045] Dilute pure acrylic acid liquid 20 times with deionized water, called base liquid A;

[0046] Dissolve pure cellulose powder in deionized water at 58-62°C to make a cellulose suspension for later use, the weight ratio of the cellulose powder to deionized water is 2:25; add to the cellulose suspension Add fly ash and zeolite to prepare base liquid B, the weight ratio of the cellulose suspension: fly ash: zeolite is 25:4:3; the particle size of zeolite is 50-100 mesh;

[0047] Mix base liquid A and base liquid B at 65-70°C, and mix and add volume ratio of base liquid A: base liquid B is 32:67; stir after mixing and adding, stir for 3 hours, and mix the suspension The step release control agent colloid obtained by modification is used as the step release control agent; the stirring speed after mixing base liqui...

Embodiment 3

[0055] The third contaminated soil stabilization treatment method mainly includes the following steps:

[0056] (1) Preparation of ladder release control agent

[0057] Dilute pure acrylic acid liquid 20 times with deionized water, called base liquid A;

[0058] Dissolve pure cellulose powder in deionized water at 58-62°C to make a cellulose suspension for later use, the weight ratio of the cellulose powder to deionized water is 2:25; add to the cellulose suspension Add fly ash and zeolite to prepare base liquid B, the weight ratio of the cellulose suspension: fly ash: zeolite is 25:4:3; the particle size of zeolite is 50-100 mesh;

[0059] Mix base liquid A and base liquid B at 65-70°C, and mix and add volume ratio of base liquid A: base liquid B is 32:67; stir after mixing and adding, stir for 3 hours, and mix the suspension The step release control agent colloid obtained by modification is used as the step release control agent; the stirring speed after mixing base liquid...

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Abstract

The invention relates to a step releasing type solidifying stabilizing remediating method for heavy metal polluted soil. The method comprises the steps of (1) preparing a step releasing control agent;(2) treating the heavy metal polluted soil by a medicine; (3) stacking the polluted soil after medicine treating; and detecting for inspection and acceptance; and (4) backfilling the heavy metal polluted soil into a planned backfilling area after passing the inspection. According to the method, the heavy metal can be efficiently stabilized for a long time; the cost is low; the effect is good; andthe heavy metal can be released by steps.

Description

technical field [0001] The invention relates to the technical field of environmental treatment, in particular to a step release type heavy metal polluted soil solidification stabilization repair method. Background technique [0002] Soil pollution prevention and control is the activity of preventing soil from being polluted and improving and remediating polluted soil. Soil protection should focus on prevention. The focus of prevention should be on controlling the concentration and total amount of emissions from various pollution sources; regular monitoring and supervision of agricultural water use to make it meet the water quality standards for farmland irrigation; rational use of chemical fertilizers and pesticides, and prudent use of sewage sludge and river mud , Pond mud; urban sewage irrigation must be purified; promote biological control and comprehensive control of pests and weeds, and remediate mines to prevent mine pollution. In terms of improvement and treatment, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08
CPCB09C1/08
Inventor 吕晓丽张弛刘星海赵森狄花君赖冬麟佟雪娇牛苏会
Owner HEBEI YUHUAN ENVIRONMENTAL PROTECTION TECH CO LTD
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