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Restoration method of heavy metal contaminated soil

A technology of polluted soil and remediation method, applied in the restoration of polluted soil and other directions, can solve the problems of insignificant effect, high cost, long treatment time period, etc., and achieve the effect of obvious treatment effect, short period and low cost.

Inactive Publication Date: 2017-05-10
GUANGDONG POLYTECHNIC NORMAL UNIV
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Problems solved by technology

[0003] Soil remediation methods include phytoremediation, microbial remediation, and agricultural ecological restoration, etc., but these remediation methods generally have the disadvantages of long treatment time period and insignificant effect.
The leaching repair method has the advantages of short treatment period and remarkable treatment effect, but its cost is relatively high

Method used

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  • Restoration method of heavy metal contaminated soil

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Embodiment Construction

[0025] The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0026] refer to figure 1 , the heavy metal components of the polluted soil in the embodiment of the present invention are mainly Cd, Cu, Pb, and using the present invention "a method for repairing heavy metal-contaminated soil" to repair the polluted soil mainly includes the following steps:

[0027] The first step is to crush the soil to be treated for sieving;

[0028] The second step is to screen the crushed soil with a screening device with an aperture of 6mm, so that the soil that meets the aperture can be left for repairing treatment, and the soil that does not meet the aperture can be screened after reprocessing;

[0029] The 3rd step, configuration IDS eluent, the concentration of described IDS eluent is 10mmol / L;

[0030] In the fourth step, at room temperatur...

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Abstract

The invention belongs to the technical field of restoration of heavy metal contaminated soil and particularly relates to a restoration method of the heavy metal contaminated soil. The restoration method is characterized by comprising the following steps that firstly, the soil to be processed is crushed so as to be screened conveniently; secondly, the crushed soil is screened through a screening device so that soil meeting the pore diameter requirement can be left for restoration; thirdly, an IDS eluting agent is prepared, specifically, the concentration of the IDS eluting agent is 7-11 mmol / L; fourthly, the soil obtained through screening is eluted with the IDS eluting agent; fifthly, filter pressing is carried out so that the eluted soil can be separated from waste fluid; and sixthly, the IDS eluting agent in the waste fluid obtained through separation is recycled, and the soil subjected to filter pressing is cleaned. The method is mainly applicable to restoration of soil contaminated by the heavy metal such as Cd, Cu and Pb, and is simple, easy to implement, short in cycle and remarkable in treating effect; and besides, the solution is easy to recycle and reuse, so that cost is low.

Description

technical field [0001] The invention belongs to the technical field of soil remediation polluted by heavy metals, and in particular relates to a method for remediating soil polluted by heavy metals. This method is mainly used in the remediation of soil contaminated by heavy metals such as Cd, Cu, and Pb. Background technique [0002] Soil is an important resource for human production and life. With the process of urbanization and large-scale industrial production, the problem of soil pollution has become more and more serious, and it has gradually received the attention of relevant departments. Heavy metal pollution is one of the most extensive and most serious aspects of soil pollution at present; among them, heavy metals such as Cd, Cu, and Pb are the most common. Heavy metals will not only cause soil degradation, crop quality and yield decline, more importantly, heavy metals will eventually enter the human body and accumulate in the human body, thereby endangering human...

Claims

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Application Information

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IPC IPC(8): B09C1/00B09C1/02B09C1/08
CPCB09C1/00B09C1/02B09C1/08
Inventor 赵振有
Owner GUANGDONG POLYTECHNIC NORMAL UNIV
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