期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 183, 期 1-3, 页码 287-293出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2010.07.022
关键词
Micellar-enhanced ultrafiltration; Surfactant micelle; Cd2+; Zn2+; Adsorption
资金
- National Basic Research Program (973 Program) [2005CB724203]
- Ministry of Education of China [NCET-08]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT0719]
- National Natural Science Foundation of China [50608028, 50808073, 50978088]
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.
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