CTAB改性钠基膨润土对甲基橙染料废水脱色的研究  

Decoloration of methyl orange dye wastewater by CTAB modified sodium bentonite

作　　者：巩莉 杨武[2] GONG Li;YANG Wu(Qinghai University,Xining 810016,China;Northwest Normal University,Lanzhou 730000,China)

机构地区：[1]青海大学,青海西宁810016 [2]西北师范大学,甘肃兰州730000

出　　处：《青海大学学报》2022年第4期82-87,共6页Journal of Qinghai University

基　　金：国家自然科学基金项目(21665024)。

摘　　要：为明确适合吸附甲基橙染料废水的吸附剂,本研究通过离子交换制备了钠基膨润土,利用阳离子表面活性剂十六烷基三甲基B化C(CTAB)对钠基膨润土进行插层改性,制备CTAB-Na-BT复合吸附剂,研究其对甲基橙染料废水的脱色性能。结果表明:CTAB-Na-BT复合吸附剂对甲基橙染料废水的脱色率达到94.9%,吸附动力学符合准二级动力学模型,吸附过程符合Langmuir等温吸附模型,属于化学控制的单分子层吸附。本研究结果对环境废水治理具有一定的参考意义。Sodium bentonite is prepared by ion exchanges to determine the suitable adsorbent for methyl orange dye wastewater.It is intercalated with cationic surfactant cetyl trimethyl ammonium bromide(CTAB).In addition,CTAB-Na-BT composite adsorbent is prepared to study its effect on the decoloration of methyl orange dye wastewater.The results show that the decoloration rate of methyl orange dye wastewater reaches 94.9%by CTAB-Na-BT composite adsorbent.The adsorption kinetics accords with the quasi second-order kinetic model.The adsorption process belongs to chemically controlled monolayer adsorption,which conforms to Langmuir isothermal adsorption model.The results show certain reference for environmental wastewater treatment.

关 键 词：阳离子表面活性剂 钠基膨润土 甲基橙 脱色 

分 类 号：O651[理学—分析化学]