Treatment method of Ni and Pb contaminated soil remediation

Abstract

The invention provides a treatment method of Ni and Pb contaminated soil remediation. The treatment method comprises the following steps: (1) carrying out acid pickling pretreatment on taken steel slag raw materials, and then taking out, and drying for later use; (2) grinding and sieving the spare steel slag raw material to obtain steel slag granules; and (3) adding the steel slag granules into nickel and lead-containing contaminated soil, adding water and mixing and stirring, and then backfilling the processed soil to original contaminated sites, and naturally curing. According to the treatment method of Ni and Pb contaminated soil remediation provided by the invention, after a small amount of steel slag raw material is subjected to acid pickling treatment, the porosity can be increased and the opportunity of contact between a medicament and a pollutant is improved; meanwhile, the steel slag granules used as a loose and porous silicate-containing substance with a large specific surface area and heavy metals generate ion exchange, surface coordination and co-precipitation and other effects to reduce the effectiveness of the heavy metals in soil together. The method has the advantages of simple process, low cost, good stability, and good economic, social and environmental benefits, and capability of turning waste into treasure.

Description

technical field [0001] The invention belongs to the technical field of contaminated soil treatment, and in particular relates to a treatment method for restoring Ni and Pb polluted soil. Background technique [0002] In recent years, my country's industrial production has caused a lot of pollution to the environment, especially the problem of highly concealed soil pollution has become increasingly apparent. Soil heavy metal pollution, especially nickel and lead pollution, has attracted much attention because nickel and lead can accumulate and affect human health. Nickel and lead have high toxicity, long-term and non-mobile properties. Once the soil is polluted, under the joint action of various components of the soil, physical, chemical and biological effects can occur, causing changes in their existing forms and resulting in their migration. Changes in sex and bioavailability. [0003] The nickel and lead pollution in the soil comes from industrial and mining enterprises ...

AI Technical Summary

Problems solved by technology

[0006] In view of the above-mentioned shortcoming of the prior art, the object of the present invention is to provide a kind of treatment method of Ni, Pb polluted soil remediation, for existing Ni, the problem of Pb heavy metal polluted soil, develop the remediation Ni, Pb with steel slag as raw material. The method of Pb pollution expands a new way for the comprehensive utilization of steel slag

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