龙须菜对水体Cu^(2+)、Cd^(2+)的去除效率及其生理响应  

Phytoremediation and Physiological Response of Cu^(2+) ,Cd^(2+) Contaminated Water by Gracilaria lemaneiformis

作　　者：吴小松[1] 黄鹤忠[1] 丁飞飞[1] 陈金凤[1] 

机构地区：[1]苏州大学生命科学院,苏州大学水产研究所,江苏苏州215123

出　　处：《水生态学杂志》2009年第5期41-45,共5页Journal of Hydroecology

基　　金：江苏省社会发展项目(BS2002016)资助

摘　　要：通过室内实验,研究了龙须菜对水体Cu2+、Cd2+的去除效率及其部分生理生化指标的变化状况。结果显示,龙须菜对水体低浓度(0.05mg/L)Cu2+、Cd2+的去除率分别达到了99.9%和93.1%;对较高浓度(0.5mg/L)Cu2+、Cd2+的去除率分别为55.24%和86.15%;水体较高浓度(0.5mg/L)Cu2+会导致龙须菜叶绿素a、b和藻红素的含量均显著下降(P<0.05),而高浓度(2.5mg/L)Cd2+不会导致色素含量的显著下降;龙须菜对环境中Cu2+的生理响应浓度也明显小于Cd2+,藻体SOD活性出现峰值且MDA含量显著高于(P<0.05)对照组的浓度水平分别为Cu2+0.05mg/L及Cd2+0.5mg/L。龙须菜更适宜作为对海水Cd2+污染进行生物修复的植物。Experiments of phytoremediation and physiologic index variability of Gracilaria lemaneiformis under the persecution of different Cu^2＋ and Cd^2＋ contaminated water were conducted. The results showed that, the respective efficiencies of removal were 99.9% and 93.1% when treated G. lemaneiforrnis with 0.05 mg/L Cu^2＋ and Cd^2＋ , the respective efficiencies of removal were 55.24% and 86.15% when treated with 0.5 mg/L Cu^2＋ and Cd^2＋ ; the high concentration Cu2. （0.5 mg/L） led a significant decrease of PE and chlorophyll a and chl. b in G. lemaneiformis, while the high concentration Cd^2＋ （2.5 mg/L） didn＇t led an insignificant decrease; the concentration of physiological response of Cu^2＋ was lower than Cd^2＋, the metal concerntrtion levels that of SOD activity had a peak and the content of MDA had a significant increase was at 0.05 rag/L（ Cu^2＋ ） and 0.5 mg/L （ Cd^2＋ ） respectively. G. lemaneiformis is more suitable as a bioremediation plant to Cd^2＋ contaminated water.

关 键 词：龙须菜 铜 镉 去除率 生理响应 

分 类 号：X55[环境科学与工程—环境工程] X820.6