单一与混合重金属在泥蚶体内的累积特征  

Accumulation characteristics of heavy metals in Tegillarca granosa under singleor combined stress exposure

作　　者：霍礼辉[1,2] 林志华[2] 朱东丽[3] 刘广绪[4] 陈彩芳[2] 

机构地区：[1]宁波大学生命科学与生物工程学院,浙江宁波315211 [2]浙江万里学院生物与环境学院,浙江宁波315100 [3]中国海洋大学水产学院,山东青岛266003 [4]浙江大学动物科学学院,浙江杭州310029

出　　处：《海洋科学》2012年第3期54-60,共7页Marine Sciences

基　　金：国家科技支撑计划项目(2009BADB7B02);国家现代农业产业技术体系项目(nycytx-47)

摘　　要：通过室内半静态暴毒实验,在铜、铅、镉三种重金属的单一胁迫与两两联合胁迫条件下,研究了繁殖期泥蚶(Tegillarca granosa)对重金属的富集规律。结果表明:泥蚶对单一Cu2+、Pb2+、Cd2+的生物富集系数(BCF)分别为210.16～1 178.66、128.15～603.84和198.84～659.37;联合重金属胁迫条件下,Cd2+对Cu2+的富集具有一定的拮抗作用;Cd2+和Cu2+在泥蚶体内以可溶形式存在,而Pb2+以不溶形式存在;Cu2+和Cd2+对泥蚶富集Pb2+有一定的协同效应;砂滤海水中的暂养的泥蚶,其体内的重金属含量除Cu2+外都较为稳定。A semi-static exposure toxicity test was conducted under laboratory-controlled conditions to study the accumulation characteristics and mechanisms of heavy metals （Cu, Pb, and Cd） in brood stock of Tegillarca granosa in the presence of single or combined heavy metals. The bioconcentration factors （BCF） of Cu, Pb, and Cd were 210.16-1 178.66, 128.15-603.84 and 198.84-659.37 respectively. The value of Cu in T.granosa was higher than those of Pb and Cd; In the presence of combined heavy metal, a competitive adsorption relationship existed between Cu and Cd.The localization of Cu and Cd was in soluble fraction, whereas Pb was located in insoluble fraction. A synergistic relationship existed between Cu and Cd; and the accumulation of Cu was related to process of breed and lipid; the accumulation of heavy metals was closely bound to the binding sites and metal-binding proteins, therefore, heavy metals except Cu were a stable condition in T. granosa with time expansion in sand filtered seawater.

关 键 词：泥蚶(Tegillarca granosa) 重金属 联合胁迫 生物富集系数 

分 类 号：S917[农业科学—水产科学] X384[环境科学与工程—环境工程]