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自然水体生物膜有机组分对Pb(2+)的吸附特性及其影响因素
引用本文:康春莉,郭晶,郭平,赵宇侠,董德明.自然水体生物膜有机组分对Pb(2+)的吸附特性及其影响因素[J].高等学校化学学报,2005,26(11):2043-2045.
作者姓名:康春莉  郭晶  郭平  赵宇侠  董德明
作者单位:吉林大学环境与资源学院环境科学系,长春,130023
摘    要:生物膜在天然水环境和工程处理中起着重要的作用.关于自然水体生物膜对重金属的吸附作用已有很多报道.但多数报道认为,生物膜中的无机物即铁锰氧化物对重金属的吸附起着主要作用,而对于生物膜的重要组成部分——有机组分对重金属吸附影响的研究则很少.

关 键 词:胞外聚合物  非活体细胞  活体细胞  生物吸附
文章编号:0251-0790(2005)11-2043-03
收稿时间:01 4 2005 12:00AM
修稿时间:2005-01-04

Adsorption Behavior of Pb2+ by Organic Components of Natural Biofilms in Natural Water and the Influencing Factors
KANG Chun-Li,GUO Jing,GUO Ping,ZHAO Yu-Xia,DONG De-Ming.Adsorption Behavior of Pb2+ by Organic Components of Natural Biofilms in Natural Water and the Influencing Factors[J].Chemical Research In Chinese Universities,2005,26(11):2043-2045.
Authors:KANG Chun-Li  GUO Jing  GUO Ping  ZHAO Yu-Xia  DONG De-Ming
Institution:Department of Environmental Science,College of Environment and Resources,Jilin University,Changchun 130023,China
Abstract:The biosorption of Pb~2+ by the organic components(exopolymer,nonliving body bacterium and living bacterium) on the dominant bacterium obtained from the surface coatings in natural waters and the effects of biosorption time,temperature and initial pH were investigated.The results showed that Pb~2+ biosorption process by the organic components above was divided into fast phase and slow phase,biosorption equilibrium time was 360,120 and 150 min respectively;the biosorption ability of exopolymer is much higher than nonliving body bacterium and living body bacterium,the maximum biosorption amount of Pb~2+ was all reached at pH=6,the effect of temperature on the biosorption ability of nonliving body bacterium and living body bacterium was negligible;both the Longmuir and Freundlish could describe the course of the biosorption of on Pb~2+ by the organic components.the biosorption ability of exopolymer is much higher than nonliving body bacterium and living body bacterium;the thermodynamics experiments also carried on when the Cd~2+ was present,the biosorption of Pb~2+ by the three organic components was also followed the Langmuir and Freundlich(equation),but the biosorption amount and the saturated biosorption amount of Pb~2+ was decreased.
Keywords:Exopolymer  Nonliving body cell  Living body cell  Biosorption
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