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.
出处
《土壤》
CAS
CSCD
北大核心
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
关键词
多环芳烃
污染土壤
植物修复
提取效率
Polycyclic aromatic hydrocarbons
Contaminated soil
Phytoremediation
Phytoextraction rate
