胞外聚合物对水中Cd(Ⅱ)的吸附性能研究  

Study on adsorption performances of Cd(Ⅱ) by extracellular biopolymer substances

作　　者：王远红[1] 张红波[2] 罗世田 刘巍峰 赵二丽 

机构地区：[1]河南城建学院环境与市政工程系,平顶山467001 [2]河南城建学院生物工程系,平顶山467001 [3]平顶山市建设工程质量监督站,平顶山467001

出　　处：《环境工程学报》2010年第10期2185-2189,共5页Chinese Journal of Environmental Engineering

基　　金：国家教育部博士学科点专项基金(20093227110015);河南省科技攻关项目(082102220009);河南省教育厅科技攻关项目(2009A610001)

摘　　要：以Pseudomonas fluorescens C-2产生的胞外聚合物PF-2作为新型生物吸附剂,以傅里叶变换红外光谱(FTIR)对其进行表征。系统地研究了胞外聚合物PF-2对水中Cd(II)的吸附行为。结果表明,在pH值为6.0,该吸附剂对水中的Cd(II)具有很强的吸附能力。聚合物PF-2对Cd(Ⅱ)的吸附较易进行,吸附等温线能较好地用Langmuir模型来描述,最大单分子层吸附量为33.50 mg/g,吸附动力学很好地符合准二级动力学模型。胞外聚合物PF-2含有的主要官能团为羧基、羟基和氨基等,其中羧基、羟基参与了Cd(Ⅱ)的吸附。结果表明利用胞外聚合物PF-2去除环境水样中的Cd(Ⅱ)是可行的。The new extracellular biopolymer substances PF-2 produced from Pseudomonas fluorescens C-2 was used as biosorbent,and characterized using Fourier transform infrared spectrophotometer（FTIR）. The adsorption behavior of the extracellular biopolymer substances PF-2 for Cd（Ⅱ） was investigated.The results showed that the optimum pH was 6.0.Biosorption equilibrium data were better described by Langmuir isotherm model,and maximum monolayer adsorption capacity was 33.50 mg/g.The kinetic data were fitted with the pseudo-second-order.The carboxyl,hydroxyl groups of the PF-2 were involved in chemical interaction with the Cd（Ⅱ） ions depicted by Fourier transform infrared spectroscopic（FTIR） results.The study showes the potential of extracellular biopolymer substances PF-2 as an effective biosorbent for the removal of Cd（Ⅱ） from environmental and industrial wastewater.

关 键 词：胞外聚合物 Cd(Ⅱ) 生物吸附 废水处理 

分 类 号：X703[环境科学与工程—环境工程]