Adsorption of surfactant micelles and Cd2+/Zn2+ in micellar-enhanced ultrafiltration
Adsorption of surfactant micelles and Cd2+/Zn2+ in micellar-enhanced ultrafiltration
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DOI：
10.1016/j.jhazmat.2010.07.022
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发表时间：
2010-11-15
影响因子：
13.6
通讯作者：
He, Song-Bao
中科院分区：
文献类型：
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作者：
Huang, Jin-Hui;Zeng, Guang-Ming;He, Song-Bao
胶束强化超滤(MEUF)是一种去除废水中重金属的有效方法。以十二烷基硫酸钠(十二烷基硫酸钠)为表面活性剂，采用聚砜中空超滤膜对废水中的Cd~(2+)/Zn~(2+)进行了高效的超滤处理。通过改变表面活性剂用量和进料中Cd~(2+)/Zn~(2+)浓度，研究了表面活性剂胶束和Cd~(2+)/Zn~(2+)在MEUF中的吸附行为。分析了吸附动力学、吸附等温线和热力学规律，并进行了X射线光电子能谱(XPS)分析。结果表明，当Cd~(2+)/Zn~(2+)浓度为50 mg/L，十二烷基硫酸钠加入量为2.15g/L时，渗透液中重金属离子浓度稳定在1~4 mg/L左右，Cd~(2+)/Zn~(2+)在十二烷基硫酸钠胶束上的吸附符合二级动力学和朗缪尔等温线规律。吸附是一种自发的吸热过程，其中吸附力主要是相反电荷的吸引。(C)2010爱思唯尔B.V.保留所有权利。
Micellar-enhanced ultrafiltration (MEUF) is a powerful treatment developed to remove heavy metals from wastewater. Efficient removal of Cd2+/Zn2+ from wastewater was performed by MEUF using a polysulfone hollow ultrafiltration membrane, with sodium dodecyl sulfate (SDS) as the surfactant. The adsorption of surfactant micelles and Cd2+/Zn2+ in MEUF was studied by changing the surfactant dosage and the Cd2+/Zn2+ concentration in the feed. In addition, kinetics, adsorption isotherms, and thermodynamic rules were analyzed, and X-ray photoelectron spectroscopy (XPS) was conducted. It was found that when the Cd2+/Zn2+ feed concentration was 50 mg/L, and the SDS dosage reached 2.15 g/L, the concentration of heavy metal ions in the permeate stabilized at around 1-4 mg/L. and the adsorption of Cd2+/Zn2+ on SDS micelles followed second-order kinetics and the Langmuir isotherm laws. Adsorption is a spontaneous endothermic process in which the adsorption force is principally the attraction of opposite electrical charges. (C) 2010 Elsevier B.V. All rights reserved.