几种豆科、禾本科植物对多环芳烃复合污染土壤的修复  

Remediation Efficiency of Several Legumes and Grasses in PAH-contaminated Soils

作　　者：沈源源 滕应[2] 骆永明[2] 孙明明[2] 付登强[2] 盛下放[1] 李振高[2] 

机构地区：[1]南京农业大学生命科学学院农业部农业环境微生物工程重点开放实验室,南京210095 [2]中国科学院土壤环境与污染修复重点实验室(南京土壤研究所),南京210008

出　　处：《土壤》2011年第2期253-257,共5页Soils

基　　金：中国科学院知识创新工程项目(KZCX2-YW-404;KSCX2-YM-G071);国家高技术研究发展计划(863计划)项目(2007AA061101);江苏省自然科学基金项目(BK2009016)资助

摘　　要：通过盆栽试验,研究了几种豆科植物与禾本科植物对多环芳烃(PAHs)复合污染土壤的修复作用。结果显示,90天后8种植物对土壤中PAHs均有不同程度降解效果,其中紫花苜蓿和多年生黑麦草对土壤PAHs的去除率分别达48.4%、46.8%,且对3环PAHs去除较为彻底,对4环及4环以上的PAHs去除效果较差。8种供试植物对PAHs均有一定的吸收、富集与转运的能力,紫花苜蓿和多年生黑麦草对土壤PAHs的生物富集系数分别为0.096、0.085,其提取修复效率为0.017%和0.013%。可见,紫花苜蓿和多年生黑麦草具有较好的根际修复潜力。Phytoremediation for soil PAHs with several legumes and grasses were investigated using a greenhouse study.The results indicated that eight plant species had different roles in PAHs degradation and removal in soil after 90 days.The removal rates of alfalfa and perennial ryegrass were 48.4% and 46.8%,respectively,and the biodegradation efficiency of 3-ring PAHs was high than those of 4-ring,5-ring and 6-ring PAHs.The plant species showed different capability in PAHs uptake,accumulation and translocation from soils.Bioconcentration factors（BCFs） of alfalfa and perennial ryegrass were 0.096 and 0.085,but their phytoextraction rates were only 0.017% and 0.013%,respectively.So alfalfa and perennial ryegrassthe have good rhizoremediation potential in PAH-contaminated soil.

关 键 词：多环芳烃 污染土壤 植物修复 提取效率 

分 类 号：X503.233[环境科学与工程—环境工程]