表面活性剂改性有机沸石对废水中亚甲基蓝的吸附行为

用表面活性剂十六烷基三甲基溴化铵(CTMAB)和十二烷基硫酸钠(SDS)复合改性沸石,制备了阴阳离子表面活性剂改性沸石,利用X射线衍射和红外吸收光谱表征了改性前后沸石的结构,并研究了改性沸石对亚甲基蓝的吸附行为.结果表明,改性后沸石的吸附性能明显增强;在溶液pH 8、常温,吸附时间100 min、改性沸石用量20 g/...

Adsorption of methylene blue in wastewater by surfactant-modified zeolite

Zeolite modified with anion-cation surfactants was prepared by incorporating both cationic surfactant cetyltrimethylammonium bromide（CTMAB） and anionic surfactant sodium dodecyl sulfate（SDS）.The structure of the zeolites before and after modification was analyzed by means of infrared spectrometry and X-ray diffraction.The adsorption behavior of the modified zeolite to methylene blue in wastewater was evaluated.Results show that modification with the surfactants contributes to greatly increase the adsorption capacity of zeolite to methylene blue.At a solution pH of 8,room temperature,absorption time of 100 min,and modified zeolite dosage of 20 g/ L,the methylene blue in wastewater（160 mg/L） was removed at a rate of up to 99.32%.The adsorption kinetics followed the laws of pseudo-second order kinetic model,and the relationship between adsorption capacity（Qe） and equilibrium mass concentration（ce） was in accordance with Langmuir isothermal adsorption equations.