Method for restoring heavy metal polluted soil in mine field

A technology of polluted soil and heavy metals, applied in the restoration of polluted soil, etc., can solve many problems such as

Inactive Publication Date: 2011-06-29
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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Problems solved by technology

[0007] At present, there are not many practical, reliable and mature methods and technologies for remediation of heavy metal-contaminated soil in mining areas. Ex

Method used

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  • Method for restoring heavy metal polluted soil in mine field
  • Method for restoring heavy metal polluted soil in mine field

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Experimental program
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Embodiment Construction

[0011] Basic material preparation:

[0012] A) Red mud (Red Mud) was purchased from Shandong Aluminum Co., Ltd., and passed through a 100-mesh sieve before use.

[0013] B) Bone Char (Bone Char) was purchased from Shandong Tengzhou Chemical Factory, and passed through a 50-mesh sieve before use.

[0014] C) Contaminated soil: Collected from 0-20cm of heavy metal-contaminated farmland caused by the collapse of the tail sand dam along the Dahuan River in Huanjiang County, Guangxi, with a lead content of 816.87mg·kg -1 , zinc content 614.20mg·kg -1 , pH=3.66. Air-dry after picking, pass through a 2mm sieve for later use.

[0015] D) The test container is a plastic cup that can hold 100g of soil

[0016] Establishment of training system:

[0017] According to the different addition methods of red mud and bone char, there are 4 treatments:

[0018] (1) Treatment without adding red mud and bone char (CK);

[0019] (2) 2% red mud (mass ratio) addition treatment (2RM);

[0020...

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Abstract

The invention relates to a method for restoring heavy metal polluted soil in a mine field, comprising the following step: mixing one or two of red mud and bone black with polluted soil, wherein the adding amounts of the red mud and bone black are that 2-5 g of the red mud and 2-5 g of the bone black are added into each 100 g of the polluted soil. In the invention, the red mud and the bone black which have the characteristics of wide source and low cost are adopted, and the red mud and the bone black are added into the polluted soil so as to be subjected to chemical reaction (precipitation, adsorption, complexing, oxidization-reduction, and the like) together with the lead and zinc in the soil, therefore, a stable compound is formed, the biological effectiveness of the lead and zinc in the soil is reduced, and the purpose of managing the lead and zinc pollutions of the soil is achieved.

Description

technical field [0001] The invention belongs to the treatment and repair technology of heavy metal polluted soil in mining areas, and in particular relates to a method for repairing heavy metal polluted soil in mining areas. Background technique [0002] The remediation of heavy metal-contaminated soils is mainly based on two strategies: fixation in soil and removal from soil. The remediation technology of heavy metal contaminated soil is mainly divided into two categories: in situ remediation and ex situ remediation. The remediation of heavy metal-contaminated soil in metal mining areas and surrounding areas generally adopts in-situ remediation methods, mainly including physical techniques: guest soil and soil caping, pyrometallurgical separation, electrokinetic technology, Isolation and containment, etc.; Bioremediation technology: Phytoremediation, Microremediation, Composting, etc.; Chemical technology: Chemical immobilization, Chemical washing, Chemical Oxidation / redu...

Claims

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Application Information

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IPC IPC(8): B09C1/08
Inventor 黄益宗郝晓伟
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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