孔石莼(Ulva pertusa)对铅、铜、镉的吸收  

The Uptake of Pb^(2+),Cu^(2+),Cd^(2+) by Ulva pertusa

作　　者：魏海峰[1] 刘长发[2] 张俊新[2] 刘恒明[2] 

机构地区：[1]大连水产学院海洋环境工程学院,辽宁大连116023 [2]中国水产科学院渔业水体净化技术和系统研究重点开放实验室

出　　处：《环境科学与管理》2008年第8期51-53,共3页Environmental Science and Management

基　　金：国家自然科学基金项目(30271029);中国水产科学院渔业水体净化技术和系统研究重点开放实验室开放基金(FWT-200703)资助

摘　　要：研究了大型藻孔石莼对铅、铜和镉的吸收动力学和热力学过程。结果表明,暴露于不同浓度的重金属体系中的孔石莼对铅、铜和镉的积累量随着水相中的游离态浓度的增加而增加,可以用Langmuir吸附等温式从热力学平衡角度加以描述,铅和镉饱和结合量分别为:0.715 mg/g干重,Cd2+为0.037 mg/g干重;在孔石莼对铜(0.056 mg/L)吸收动力学浓度的实验中,第4天达到了吸收平衡,蓄积量为对照组的9.01倍;在镉暴露浓度为0.028 mg/L的实验中,第5天达吸收平衡,蓄积量为对照组的5.06倍。The process of uptake Pb^2＋ ,Cu^2＋ , Cd^2＋by Ulva pertusa were studied. The results showed that Langmuir adsorption isotherm can be employed to the processof uptaking heavy metal by Ulva pertusa. The saturated capacity of Pb^2＋ and Cd^2＋ were 0. 715 mg/L and 0. 037 mg/L, respectively. Assimilation equilibrium of Ulva to Cu^2＋ of which the concentration is 0. 056 mg/L can be achieved in 4 days and the assimilation is 9. 01 times as many as the assimilation of control class ; equilibrium can be approached in 5 days under 0. 028 mg/L of Cd^2＋ and the assimilation is 5.06 times as many as contral class.

关 键 词：孔石莼 重金属 吸收 积累 

分 类 号：X75[环境科学与工程—环境工程]