农业环境科学学报2012，Vol.31Issue(9)：1684-1689,6.
季铵盐阳离子表面活性剂对普通小球藻和斜生栅藻的急性毒性
Acute Toxicity of Quaternary Ammonium Cationic Surfactants to Chlorella vulgaris and Scenedesmus obliquus
摘要
Abstract
Chlorella vulgaris and Scenedesmus obliquus, two green freshwater alga in environment, have been widely used to evaluate the impacts of xenobiotics duo to their sensitivity to contaminants. In this study, we investigated the acute toxicity of quaternary ammonium cationic surfactants(QACS) with different length of alkyl chain(CL=8~18) to C. vulgaris and S. obliquus. The results indicated that the 96 h-EC50 value of thirteen kinds of QACS on C. vulgaris and S. obliquus were 0.108~9.472 mg·L‐1 and 0.085~12.188 mg·L‐1, respectively. Furthermore, the acute toxicity of QACS with the same substituent group on the two species of algae gradually increased with the increasing of CL. However, the different substituent groups had little effect on the acute toxicity of QACS with the same CL to the two green algae. The relationship between acute toxicity[lg( I/EC50)] and octanol-water partition coefficients(lgKow), CL could be better fitted by parabola model than linear equation, and the fitting trends were same for the two green algae. The parabola equations for C. vulgaris and S. obliquus were lg( l/EC50)=-0.106 lgK2ow+0.746 lgKow,-0.830(R2=0.944), lg( 1/EC50)=-0.034 CL2+1.051 CL-7.725(R2=0.945) and lg( l/EC50=-0.l 19 lgK2ow +0.830 lgAow-0.812(R2=0.941), lg( l/EC50)=-0.039 CL2+1.218 CL-8.772(R2=0.945), respectively, which could provide references for the prediction of acute toxicity for similar compounds to freshwater algae.关键词
季铵盐阳离子表面活性剂/淡水藻/急性毒性/拟合方程Key words
QACS/ freshwater algae/ acute toxicity/ fitting equation分类
资源环境引用本文复制引用
喻方琴,葛飞,朱门君,梁志杰,刘燕..季铵盐阳离子表面活性剂对普通小球藻和斜生栅藻的急性毒性[J].农业环境科学学报,2012,31(9):1684-1689,6.基金项目
教育部“新世纪优秀人才支持计划”项目(NCET-10-0148) （NCET-10-0148）
国家自然科学基金项目(20877065) （20877065）
湖南省研究生科研创新项目(CX2010B269) （CX2010B269）
