单宁微球对Cr(Ⅵ)的吸附性能  

Adsorption of Cr(Ⅵ) by Tannin Microspheres

作　　者：卢玉栋[1] 柯金炼[2] 叶琳[1] 吴宗华[1] 

机构地区：[1]福建师范大学化学与材料学院,福建福州350007 [2]福建省林业科学研究院,福建福州350012

出　　处：《广州化学》2011年第3期22-27,共6页Guangzhou Chemistry

基　　金：福建师范大学横向项目(DH-584)

摘　　要：利用单宁微球吸附Cr(Ⅵ),探讨了温度、pH值、Cr(Ⅵ)初始质量浓度等因素对单宁微球吸附性能的影响,并分析了其吸附等温曲线。结果表明,单宁微球对Cr(Ⅵ)具有很好的吸附效果,吸附量可达到45.5 mg/g。单宁微球对Cr(Ⅵ)的去除率随吸附时间的延长而增大,5 h后基本达到平衡。温度对单宁微球吸附Cr(Ⅵ)的影响比较大,单宁微球对Cr(Ⅵ)的吸附是一个吸热的过程,随着温度的升高,吸附量也增大。单宁微球对Cr(Ⅵ)的吸附等温数据可用Freundlich方程描述。Using tannin microspheres to absorb the Cr（Ⅵ） in the water.The absorption performance was influenced by the factors including the absorbent amount used,the temperature,pH,initial concentration of the Cr（Ⅵ）.And the absorption isotherms of tannin microspheres to absorb the Cr（Ⅵ） were also analyzed in this paper.The results showed that the tannin microspheres had a good adsorption effect to Cr（Ⅵ）.The maximum adsorption capacity of the biosorbent was 45.5 mg/g under 298 K.The adsorptive capacity of tannin microspheres to Cr（Ⅵ） was increased as the adsorption time increased,it took 5 h to attain equilibrium.The results also showed that tannin microspheres on Cr（Ⅵ） adsorption process was a spontaneous heat reaction process,and the absorption isotherm data can be described by the equation of Freundlich.

关 键 词：单宁 微球 Cr(Ⅵ) 吸附 

分 类 号：X703.1[环境科学与工程—环境工程]