农田土壤镉污染现状与治理方法研究进展

Recent Advances of the Current Situation and Remediation Methods of Cadmium Contamination in Paddy Soil

矿石开采、农药与化肥不当施用、污水灌溉以及工业生产引起了重金属污染问题。其中,农田土壤重金属镉污染尤为突出,对社会经济造成重大影响;而各类农产品累积的重金属镉将通过食物链进入人体中,使人体健康遭受严重危害。本文综述了我国农田土壤镉污染主要来源及危害,以及湖南地区农田土壤镉污染及对应稻米含镉量现状;总结了目前治理土壤镉污染的修复技术的研究进展和各自的优缺点。结合湖南省浏阳市双桥村农田土壤镉污染的修复实例说明联合修复镉污染技术的优点,并提出了各种修复技术未来需要解决的问题及未来可能的发展方向。

Ore mining,improper applications of pesticides and fertilizers,sewage irrigation,and industrial production have caused heavy metal pollution issues.Among them,the cadmium contamination in the farmland soil is particularly serious,which has a significant impact on the social economy.And the heavy metal cadmium accumulated in various agricultural products will enter the human body through the food chain,causing serious harm to human health.This article reviews the main sources and hazards of cadmium contamination in the farmland soil in China,as well as the current status of cadmium contamination in the farmland soil and corresponding cadmium content in rice in Hunan province.Besides,the current research progress together with the respective advantages and disadvantages of remediation methods of cadmium contamination in soil are summarized in detail.The remediation process of cadmium contamination in Shuangqiao Village,Liuyang City,Hunan Province is further analyzed,which shows the advantages of joint remediation methods of cadmium contamination technology.Various remediation technologies for the cadmium contamination are needed to be explored and developed in the near future.