SDS改性沸石吸附结晶紫  

Adsorption crystal violet on sodium dodecyl sulfate( SDS) modified zeolites

作　　者：翁晴[1] 张志刚[1] 

机构地区：[1]福建工程学院生态环境与城市建设学院,福州350118

出　　处：《环境工程学报》2014年第2期548-552,共5页Chinese Journal of Environmental Engineering

基　　金：福建省自然科学基金资助项目(2013J01215);福建工程学院科研发展基金资助项目(GY-Z11058)

摘　　要：以表面活性剂十二烷基硫酸钠(SDS)对沸石进行改性,改性后的沸石对结晶紫溶液进行吸附,以紫外可见分光光度计分析最佳吸附条件。实验结果表明,在30℃,SDS改性沸石投入量为0.25 g;吸附平衡时间为1 h;pH为8的条件下,对含50 mg/L结晶紫染料的去除率可达到92.6%,吸附量达到4.63 mg/g。SDS改性沸石吸附结晶紫的等温吸附曲线与Henry型和Freundlich型均拟合较好。热力学参数计算结果表明,吸附符合自发吸热过程。CrystaI violet solution was adsorbed with zeolite modified by sodium dodecyl sulfate （SDS） in this study. UV-Vis spectrophotometer was adopted to determine the maximum adsorption capacity of the zeolite modified by SDS. The results indicated that the adsorption capacity of crystal violet on modified zeolites was 4.63 mg/g and removal rate was 92.6% , while by contact time was 1 h, the dosage was 0.25 g, pH at 8 and initial concentration was 50 mg/L. The adsorption isotherm of crystal violet adsorbed by modified zeolites fits well to Henry and Freundlich isotherm. The calculated thermodynamic parameters suggested that the adsorption of crys- tal violet on modified zeolites was spontaneous and endothermic in nature.

关 键 词：改性沸石 SDS 结晶紫 吸附 

分 类 号：X703[环境科学与工程—环境工程]