摘要
农业土壤重金属污染是土壤环境安全研究的热点问题之一,它影响食品安全,威胁人类健康。农业重金属土壤污染以中低浓度污染为主,对其修复的要求不同于一般重金属修复,需满足农用条件的要求。本文从农业土壤重金属污染特点入手,综述了国内外农业土壤重金属防治技术上已有的一些方法与实践,对以土壤原位修复为主的各类农业土壤原位修复技术的优势和局限性进行了比较,分析了物理修复、化学修复、生物修复和联合修复等几类农业土壤原位修复方法的优缺点,对农业土壤原位修复技术发展进行了展望。
Heavy metal pollution in agricultural soil is one of the hot issues in soil environmental safety research,which affects crop food safety and threatens human health. Heavy metal pollution in agricultural soil is mainly with low and medium concentration pollutants,and its remediation is quite different from that for general heavy metal pollution. Remediation for heavy metal pollution in agricultural soil should meet the farmland needs. In this paper,we reviewed some existing methods and practices in the prevention and control of heavy metals in agricultural soil at home and abroad; discussed in-situ remediation techniques for various agricultural soils,and analyzed the advantages and limitations of several types of in-situ remediation methods in agricultural soil including physical restoration,chemical remediation,bioremediation and combined remediation. Future study on in-situ remediation technology in agricultural soils are proposed.
引文
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