鄱阳湖水体沉积物中Zn、Cd对底栖生物的毒性效应及基准验证  

Toxic effects of zinc and cadium on the benthic organisms in sediments of Lake Poyang and verification of quality guideline

作　　者：熊捷迁 弓晓峰 江良 李昊霖 袁少芬 林媛 吴莉 Xiong Jieqian;Gong Xiaofeng;Jiang Liang;Li Haoling;Yuan Shaofen;Lin Yuan;Wu Li(School of Resources Environmental&Chemical Engineering Nanchang University,Key Laboratory of Lake Poyang Environment and Resource Utilization Ministry of Education,Nanchang 330031,P.R.China)

机构地区：[1]南昌大学资源环境与化工学院,鄱阳湖环境与资源利用教育部重点实验室,南昌330031

出　　处：《湖泊科学》2021年第6期1687-1700,共14页Journal of Lake Sciences

基　　金：国家水体污染控制与治理科技重大专项(2017ZX07301002-05);国家自然科学基金项目(41761095)联合资助.

摘　　要：以泥鳅(Misgurnus anguillicaudatus)、铜锈环棱螺(Bellamya aeruginosa)、河蚬(Corbicula fluminea)为受试生物,以死亡率、渗血率、体质量变化、行动迟钝率、挖洞率为测试指标,探究沉积物中Zn和Cd对底栖生物的21 d慢性毒性效应,并对鄱阳湖Zn和Cd的沉积物基准值进行了验证.结果表明,沉积物中Cd对底栖生物的毒性效应强于Zn,沉积物中Zn、Cd对泥鳅、铜锈环棱螺、河蚬的LC_(50)(半数致死浓度)分别为644和61 mg/kg、751和54 mg/kg、652和81 mg/kg,EC 50(半数效应浓度)值分别为526和49 mg/kg、589和35 mg/kg、474和45 mg/kg.经验证,沉积物Zn和Cd的TEL(临界效应浓度)、PEL(必然效应浓度)值比较合理,具有一定适用性,即当Zn、Cd的加标含量低于TEL值时,Q_(TEL)<1,不具有毒性;当加标含量高于PEL值时,Q PEL>1,毒性明显.The 21d chronic toxic effects of Zn and Cd in sediments on benthic organisms were investigated by using Misgurnus anguillicaudatus,Bellamya aeruginosa and Corbicula fluminea as the testing organisms,using mortality rate,bleeding rate,average body weight change,sluggishness rate and burrowing rate as the testing indexes,and verified by the sediment reference values of Zn and Cd in Lake Poyang.The results showed that the toxicity of Cd to benthic organisms in sediments was stronger than that of Zn,and the LC_(50)(50%lethal concentration)of Zn and Cd to Misgurnus anguillicaudatus,Bellamya aeruginosa and Corbicula fluminea were 644 and 61 mg/kg,751 and 54 mg/kg,652 and 81 mg/kg,and the EC 50(50%effective concentration)values were 526 and 49 mg/kg,589 and 35 mg/kg,474 and 45 mg/kg,respectively.It has been verified that the TEL(threshold effect level)and PEL(probable effect level)values of the sediments Zn and Cd are reasonable and have certain applicability.When the additive concentration of Zn and Cd is lower than the TEL value,Q_(TEL)<1 is not toxic.When the additive concentration was higher than PEL value,Q PEL>1 showed obvious toxicity.

关 键 词：底栖生物 重金属 毒性效应 沉积物质量基准 鄱阳湖 

分 类 号：X171.5[环境科学与工程—环境科学] X524