稀土-羧甲基壳聚糖复合物对印染废水脱色机理研究  

The Study of Mechanism on Rare Earth-Carboxymethyl Chitosan Composite Adsorption Dye

作　　者：陈晓刚[1] 陈纯馨[1] 陈忻[1] 叶秀文[1] 

机构地区：[1]佛山科学技术学院理学院,广东佛山528000

出　　处：《环境科学与技术》2010年第S2期263-267,共5页Environmental Science & Technology

基　　金：佛山市科技发展专项基金项目资助(2005060071);中国科学院知识创新工程重要方向项目资助(KZCX2-YW-209)

摘　　要：以稀土和羧甲基壳聚糖为原料配成稀土-羧甲基壳聚糖复合物处理印染废水,研究它吸附的最佳pH值及其吸附机理,运用Lagergren二级速率方程与Langmuir方程研究吸附动力学。实验结果表明,在酸性环境中,稀土-羧甲基壳聚糖复合物对染料有较好的吸附效果,不同的稀土-羧甲基壳聚糖复合物吸附不同的染料有不同的最佳pH值。复合物对染料吸附效果优良,脱色率达84%以上,最高可达99.45%。对动力学数据的分析表明,复合物在常温下对染料的吸附速率快,15min内脱色率可达80%以上,30min内基本达到吸附平衡,吸附符合吸附二级动力学方程,为物理吸附。With adsorbing dye by composite which made from rare-earth and carboxymethyl chitosan,this dissertation studed the adsorption mechanism,and studed the adsorption kinetics by Lagergren equation and Langmuir equation.The result of experiment show that rare earth-carboxymethyl chitosan composite adsorbs dye has good effect in the acic environment.Differet composite adsorbed differet dye givee birth to different best pH value.There wer pefect effect at composite adsorbing dye whose decoloring rare is least at 84% and hight at 99.45%.Base on the study of kinetics,it showed that composite can quickly adsorbed dye at constant temperature,decoloring rare reachs to 80% within 15 minutes and to equilibrium within 30 minutes,which accord with second kinetics equption.Adsorption is physics adsorption.

关 键 词：稀土 羧甲基壳聚糖 染料 吸附 

分 类 号：X791[环境科学与工程—环境工程]