Heavy metal lead contaminated soil remediation method based on deep eutectic solvent synthesized from choline chloride and malonic acid

A technology of lead-contaminated soil and deep eutectic solvent, which is applied in the field of remediation of heavy metal lead-contaminated soil, can solve the problems of ecological system hazards and long bioremediation cycle, and achieve the effect of no secondary pollution, less usage and cost reduction

CN112222181APending Publication Date: 2021-01-15SHANGHAI SECOND POLYTECHNIC UNIVERSITY

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Patent Information

Authority / Receiving Office: CN · China
Current Assignee / Owner: SHANGHAI SECOND POLYTECHNIC UNIVERSITY
Publication Date: 2021-01-15

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Abstract

The invention belongs to the technical field of heavy metal contaminated soil treatment, and particularly relates to a heavy metal lead contaminated soil remediation method based on a deep eutectic solvent synthesized from choline chloride and malonic acid. The method comprises the following steps: firstly, grinding and sieving naturally air-dried heavy metal lead contaminated soil, then adding sieved contaminated soil particles, a synthesized choline chloride malonic acid solvent, nitric acid and a soil chelating agent into a conical flask in proportion, and putting the conical flask into a magnetic stirrer for stirring, heating and leaching reaction. The lead-containing compounds which are insoluble in water in the soil are eluted through heating leaching of the stirrer, and effective leaching remediation of the lead-contaminated soil is achieved. The method disclosed by the invention has the characteristics of simplicity, high efficiency and no secondary pollution, and is a lead-contaminated soil remediation method with a good prospect.

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Description

technical field

[0001] The invention belongs to the technical field of heavy metal-contaminated soil treatment, and in particular relates to a method for remediating heavy metal-lead-contaminated soil based on a deep eutectic solvent synthesized from choline chloride and malonic acid. Background technique

[0002] With the rapid development of industrialization and the significant improvement of people's living standards, the remediation of heavy metal-contaminated soil has become a hot and difficult issue in environmental science research at home and abroad.

[0003] The technologies commonly used in the remediation of heavy metal-contaminated soil mainly include: engineering measures, physical and chemical remediation, chemical remediation and biological remediation technologies. Among them, engineering measures are more classic soil heavy metal restoration methods, which are simple and stable, but the amount of engineering implemented is huge, the investment cost is high,...

Claims

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