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Remediation method for contaminated site soil treatment

A technology of polluted soil and remediation method, which is applied in the restoration of polluted soil, soil conditioning materials, chemical instruments and methods, etc., can solve the problems of secondary soil pollution, etc., and achieves large processing capacity, wide application range, and improved utilization rate. Effect

Inactive Publication Date: 2021-02-19
衡阳市顶点环保设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a restoration method for soil treatment of polluted sites, mainly to solve the problem of secondary pollution of soil

Method used

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  • Remediation method for contaminated site soil treatment

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Comparison scheme
Effect test

Embodiment 1

[0029] refer to figure 1 , a restoration method for soil treatment of contaminated sites, comprising the following steps:

[0030] S1: Prepare raw materials, polluted soil, leaching agent, flocculant, coagulant aid and alkali solution;

[0031] S2: Remove impurities, remove the garbage in the polluted soil;

[0032] S3: crushing, the contaminated soil after removal of impurities is crushed and pretreated by a soil crusher;

[0033] S4: Leaching. First, use water to perform heterotopic leaching on the contaminated soil, and then add leaching agent to perform ectopic rinsing on the soil to obtain a mixed solution;

[0034] S5: Solid-liquid separation, solid-liquid separation of the mixed solution, backfilling the soil qualified for leaching, and retaining the cleaning solution for subsequent processing;

[0035] S6: Precipitation, put the cleaning solution into the sedimentation tank for precipitation to obtain heavy metals and waste water;

[0036] S7: waste water recovery,...

Embodiment 2

[0041] refer to figure 1 , a restoration method for soil treatment of contaminated sites, comprising the following steps:

[0042] S1: Prepare raw materials, polluted soil, leaching agent, flocculant, coagulant aid and alkali solution;

[0043] S2: Remove impurities, remove the garbage in the polluted soil;

[0044] S3: crushing, the contaminated soil after removal of impurities is crushed and pretreated by a soil crusher;

[0045] S4: Leaching. First, use water to perform heterotopic leaching on the contaminated soil, and then add leaching agent to perform ectopic rinsing on the soil to obtain a mixed solution;

[0046] S5: Solid-liquid separation, solid-liquid separation of the mixed solution, backfilling the soil qualified for leaching, and retaining the cleaning solution for subsequent processing;

[0047] S6: Precipitation, put the cleaning solution into the sedimentation tank for precipitation to obtain heavy metals and waste water;

[0048] S7: waste water recovery,...

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Abstract

The invention relates to the technical field of heavy metal soil treatment, and discloses a remediation method for contaminated site soil treatment, which comprises the following steps of: S1, preparing raw materials, contaminated soil, an eluting agent, a flocculating agent, a coagulant aid and an alkaline solution; S2, removing impurities, namely removing garbage in the contaminated soil; S3, crushing, namely carrying out crushing pretreatment on the contaminated soil subjected to impurity removal by utilizing a soil crusher; S4, leaching, firstly, carrying out ex-situ leaching on the contaminated soil with water, and then adding a leaching agent to carry out ex-situ leaching on the soil to obtain a mixed solution; and S5, carrying out solid-liquid separation, namely carrying out solid-liquid separation on the mixed solution, backfilling the soil which is qualified in leaching, and reserving a cleaning solution. According to the method, the leaching method is selected to treat and repair the soil, the leaching method has the characteristics of wide application range, quick effect, large treatment capacity, remarkable effect and the like, and natural citric acid and deionized water are adopted as leaching agents, so that heavy metals in the contaminated soil can be removed, and secondary pollution cannot be caused.

Description

technical field [0001] The invention relates to the technical field of soil treatment of polluted sites, in particular to a restoration method for soil treatment of polluted sites. Background technique [0002] Soil remediation is a technical measure to restore contaminated soil to normal functions. In the soil remediation industry, there are more than one hundred existing soil remediation technologies, and there are more than ten commonly used technologies, which can be roughly divided into three types: physical, chemical and biological. Soil remediation refers to the use of physical, chemical and biological methods to transfer, absorb, degrade and transform pollutants in the soil, reducing its concentration to an acceptable level, or converting toxic and harmful pollutants into harmless substances. [0003] Polluted sites are generally divided into heavy metal polluted sites, organic matter polluted sites, and electronic waste polluted sites. For heavy metal polluted sites...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09C1/02B09C1/08C09K17/14
CPCB09C1/00B09C1/02B09C1/08C09K17/14
Inventor 蒋俊恒刘力明贺国仲李俊霖
Owner 衡阳市顶点环保设备有限公司
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