Advances in research on repairing heavy metal pollution in soil by clay minerals

2019 2nd International Conference of Green Buildings and Environmental Management

生态环境科学

Na, Wang^1^2

Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co. Ltd., Xi'an Shaanxi

710075, China^1

Key Laboratory of Degarded and Unused Land Consolidation Engineering, Ministry of Natural Resources of China, Xi'an Shaanxi, 710075, China^2

关键词: Adsorption properties;    Chelating agent;    Correlation analysis;    Heavy metal contaminated soils;    Heavy metal pollution;    Large specific surface areas;    Practical engineering;    Soil heavy metals;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/310/4/042017/pdf
DOI  :  10.1088/1755-1315/310/4/042017

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

To reveal the repair potential and effect of clay minerals on heavy metal contaminated soil, this paper summarizes the application of common clay minerals such as kaolinite, montmorillonite and zeolite in the repair of heavy metals, and repairs heavy metals with clay minerals and biochar, lime and chelating agents. Correlation analysis illustrates the potential and mechanism of clay minerals for heavy metals. For one thing, clay minerals have a large specific surface area and a negative charge on the surface, which greatly increases their adsorption properties for heavy metals. for another, clay minerals have high nutrient elements and rich organic matter, Which increase soil fertility and trace elements, as well as crop yield. Clay minerals have been widely used in soil heavy metal pollution repair, but most of them still stay at the laboratory level. In the future, more attention should be paid to the application of clay minerals in practical engineering.