我国农田镉污染形势严峻,危及粮食安全。经过对不同修复技术方法的讨论和分析,指出镉污染农田修复传统方法以及联合修复方法的优缺点。物理修复适用范围较小;化学修复经济有效,但可能造成二次污染;生物修复周期长但绿色环保,能否大量长期投入使用有待进一步考察。由于单一修复技术具有很多限制,所以多种方法联用修复是一种良好选择。实验分析结果表明,联合修复效果均好于单一修复,建议进一步深入研究联用方法和剂量的选择,提高镉污染修复效率。

Cadmium contaminated agricultural soil is becoming a serious environment problem in China,posing a severe threat to food security.The advantages and disadvantages of conventional remediation technologies and combined remediation technologies for cadmium contaminated agricultural soil are summarized through analyzing various remediation technologies.Physical remediation technologies can only apply to a limited scope.Chemical remediation technologies are economical and efficient,but may cause secondary pollution.Biology remediation technologies are environmentally friendly,but need longer remediation period,so their large scale and long term service needs to be inspected.Because any single technology has shortages,combined remediation technologies show more application potentials.Experimental analysis results indicate that combined remediation technologies present better effect than any single technology.It is suggested to further study the combining paths and usages to improve the remediation efficiency for Cd contaminated agricultural soil.

田燕燕(1993-),女,本科,工程师,主要从事环境保护调查及修复工作;李亚娜(1987-),女,硕士,工程师,主要从事环境监测工作,通讯联系人,2858227789@qq.com。