杂交狼尾草对土壤锌／十溴联苯醚复合污染的生理响应及修复  

Physiological Responses and Phytoremediation Effects of Pennisetum americanum on Zn / BDE- 209 Co-contaminated Soils

作　　者：吕俊[1] 尹华[2] 叶锦韶[1] 彭辉[3] 刘京[1] 

机构地区：[1]暨南大学环境工程系广东省高校水土环境毒害性污染物防治与生物修复重点实验室,广州510632 [2]华南理工大学环境与能源学院工业聚集区污染控制与生态修复教育部重点实验室,广州510006 [3]暨南大学化学系,广州510632

出　　处：《农业环境科学学报》2013年第12期2369-2376,共8页Journal of Agro-Environment Science

基　　金：国家自然科学基金委-广东联合基金重点项目(U0933002);国家自然科学基金项目(50978122)

摘　　要：采用室内盆栽试验,研究了杂交狼尾草对土壤中Zn/十溴联苯醚(BDE-209)污染的生理响应及修复效果。结果表明,杂交狼尾草的生物量随着BDE-209浓度增大而升高,低中浓度Zn/BDE-209复合污染明显促进了植株生长;在单一BDE-209和复合两种污染条件下,随着污染物浓度上升,丙二醛(MDA)含量上升,可溶性蛋白质含量、超氧化物歧化酶(SOD)活性均呈下降趋势;植物地下部分对Zn和BDE-209的积累均大于地上部分,随着BDE-209浓度增大,植物对Zn和BDE-209积累量上升,低中浓度Zn/BDE-209复合污染对积累、转运Zn和BDE-209均有促进作用,植物地下部分对Zn的富集系数高达7.78;杂交狼尾草对复合污染土壤中BDE-209去除率高达60.73%,不同去除效果为根际去除率>非根际去除率>无植物去除率。Phytoremediation is an environment-friendly and cost-effective technology to reduce contaminants in the environment. A pot experiment was conducted in a greenhouse to investigate the physiological responses and the phytoremediation effects of Pennisetum americanum on Zn and BDE-209 combined pollutants in soils. Biomass of P. americanum escalated with single BDE-209, and also Zn/BDE-209 co-presence at low and moderate concentrations. Under BDE-209 alone and Zn/BDE-209 in combination, increasing their concentrations increased MDA contents, but decreased soluble protein contents and SOD activities. Concentrations of BDE-209 and Zn were significantly higher in roots than in shoots. Accumulation of Zn and BDE-209 by plant was enhanced by increased BDE-209 levels. Low and moderate Zn/BDE-209 co-contamination promoted accumulation and translocation of Zn and BDE-209 in plant, especially for Zn, the bioaecumulation factor of which increased to 7.78 in the underground parts of plant. The maximum removal efficiency of BDE-209 by P. americanum was 60.73% in co-contaminated soils, with higher in the rhizosphere than nonrhizosphere.

关 键 词：十溴联苯醚 锌 复合污染 植物修复 杂交狼尾草 

分 类 号：X171.5[环境科学与工程—环境科学]