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Method of treating lead contaminated soil with bone charcoal

A technology of lead-contaminated soil and bone char, applied in the restoration of contaminated soil, etc., can solve problems that are few and have not been reported

Inactive Publication Date: 2006-08-02
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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AI Technical Summary

Problems solved by technology

[0006] At present, there are not many practical, reliable and mature methods and technologies for remediation of heavy metal-contaminated soil. To explore efficient, economical and practical treatment technologies for heavy metal-contaminated soil will be one of the important topics before people.
[0007] There have been many reports on the use of bone charcoal to remove fluoride in drinking water at home and abroad, and it is becoming a relatively mature technology, but the use of bone charcoal to restore heavy metal (lead) contaminated soil has not been reported so far.

Method used

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  • Method of treating lead contaminated soil with bone charcoal

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Experimental program
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Embodiment

[0015] In this case, bone charcoal from the United Kingdom and Zhejiang Province of my country was applied to lead-contaminated soil to study its effect on the absorption of heavy metal lead by plants.

[0016] Grind the above two kinds of bone charcoal into 320 mesh (300-350 mesh is acceptable). For the convenience of description in the tables and drawings described later, the British bone charcoal is represented by E, and the Chinese Zhejiang bone charcoal is represented by C. . Bone charcoal was rinsed with deionized water several times before application until the pH value of bone charcoal was close to that of deionized water, and dried at 105°C for 24 hours before use;

[0017] Collect lead-contaminated soil, lead content 313.2mg kg -1 , air-dried, ground, and passed through a 2-mm sieve for experimental use.

[0018] The plant is Chinese kale.

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Abstract

The method of treating lead contaminated soil with bone charcoal is to use bone charcoal with wide source and low cost in chemical reaction with lead in soil to form stable compound, so as to lower biologically effective lead content in soil, reduce the absorption and accumulation of plant root system and treat lead contamination of soil. Specifically, bone charcoal is crushed into powder of 300-350 mesh and buried into soil in the amount of 2-16 g each kg soil.

Description

[0001] Field [0002] The invention belongs to the treatment and restoration technology of heavy metal polluted soil, and in particular relates to a method for treating lead-contaminated soil by utilizing bone char. Background technique [0003] Due to long-term sewage irrigation and sludge application, atmospheric deposition caused by human activities, unreasonable development of mineral resources, and large-scale application of chemical fertilizers and pesticides, soil heavy metal pollution has become increasingly serious. The vegetable field soils in the suburbs of Shanghai, Guangzhou, Tianjin, Shenyang, Xi'an, etc. in my country are all polluted by heavy metals such as Pb, Cd, and Hg. At present, the area of ​​cultivated land polluted by heavy metals such as Cd, As, Pb, Hg, and Zn in my country is nearly 2.0×10 7 hm 2 , accounting for about one-fifth of the total arable land area; among them, 1.0×10 industrial "three wastes" polluted arable land 7 hm 2 , the area of ​​...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08
Inventor 朱永官陈世宝黄益宗滕曼
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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