多氯联苯污染农田土壤的原位生态调控修复效应  

In-situ Remediation of Polychlorinated Biphenyls Polluted Soil by Ecological Controlling Measures:A Field Trial

作　　者：潘澄[1,2] 滕应[1,2] 骆永明[1,3,2] 涂晨[1,3] 李秀芬[1,2] 马婷婷[1,2] 张满云[1,2] 李振高[1] 宋静[1] 

机构地区：[1]中国科学院南京土壤研究所土壤环境与污染修复重点实验室,南京210008 [2]中国科学院研究生院,北京100049 [3]中国科学院烟台海岸带研究所,烟台264003

出　　处：《环境科学》2012年第7期2510-2515,共6页Environmental Science

基　　金：国家自然科学基金重大国际合作项目(40810180);国家高技术研究发展计划(863)项目(2009AA063104);环保部公益性行业科研专项(2010467016)

摘　　要：通过田间原位修复试验,初步研究了不同生态调控措施对多氯联苯(PCBs)污染农田土壤的修复效应.结果表明,经添加石灰、翻耕、种植紫花苜蓿、种植水稻等修复阶段后,土壤中PCBs含量呈显著降低,平均去除率达86.9%;同时也降低了土壤中类二英PCBs毒性当量.对土壤PCBs同系物分析结果表明,在调控翻耕与种植紫花苜蓿修复阶段,主要对低氯代PCBs进行降解去除;在种植水稻修复阶段,则主要降低了高氯代PCBs含量.结果还显示原位生态调控修复并未对土壤微生物生态产生较大影响.可见,该技术对于修复PCBs污染农田具有良好的应用前景与推广意义.A field experiment was conducted to study the remediation of agricultural soils polluted with polychlorinated biphenyls （PCBs） by several ecological controlling measures. After sequential stages of liming, plowing, planting alfalfa and paddy, a significant part of PCBs was removed from the soil, with an average removal rate of 86.9%. The treatment also decreased the toxic equivalency of dioxin-like PCBs in soil. Analysis of PCB congener composition showed that at stages of liming, plowing and alfalfa planting, the low- chlorinated biphenyls were removed; whereas at the stage of paddy planting, the high-chlorinated biphenyls were degraded. The ecological controlling measures had little influence on the microbial communities in soil. The results suggest that ecological control techniques could be widely applied in the remediation of agricultural soils with PCBs contamination.

关 键 词：多氯联苯 土壤污染 生态调控 原位修复 农田土壤 

分 类 号：X53[环境科学与工程—环境工程]