%0 Journal Article
%T Sorption of Cu( Ⅱ ) and Cd( Ⅱ ) by natural biofilms<br>自然水体生物膜对铜（Ⅱ）、镉（Ⅱ）的吸附研究
%A TIAN Chao
%A ZHANG Yuanyuan
%A QIU Zhiguo
%A LI Xuede
%A <br>田超
%A 张园园
%A 邱治国
%A 李学德
%J 环境科学学报
%D 2007
%I 
%X With high adsorption capability and adsorption surface area, biofilms are actively researched, especially in the area of adsorption of heavy metals. Heavy metal adsorption is greatly affected by the method of developing the biofilm. A biofilm was developed in Dongpu reservoir on the surface of a cotton thread. The characteristics and thermodynamics of Cu and Cd adsorption on the biofilm were studies. Statistical analysis of the adsorption data showed that the thermodynamic data for each metal fit the Freundlich(F) and Langmuir(L) isotherms. The capacity of adsorption of Cu was greater than that for Cd. The adsorption of both Cu and Cd reached equilibrium in less than one hour and fit a second-order kinetics equation. The adsorption of Cu and Cd increased with pH up to pH 7.
%K biofilm
%K adsorption isotherm
%K adsorption kinetics
%K pH<br>生物膜
%K 吸附等温式
%K 吸附动力学
%K pH
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=03A55E61A8750ACAC6AF81EF9E2AC838&aid=815415A8B6CEB926FC941B5FC934C443&yid=A732AF04DDA03BB3&vid=DB817633AA4F79B9&iid=B31275AF3241DB2D&sid=E947FD4445DA7BA0&eid=A40901B6135B333E&journal_id=0253-2468&journal_name=环境科学学报&referenced_num=1&reference_num=12