Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 185, Issue 2-3, Pages 1304-1310Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2010.10.046
Keywords
Micellar-enhanced ultrafiltration (MEUF); Cd2+; Methylene blue (MB); Sodium dodecyl sulfate (SOS); Retentate
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Funding
- Program for Changjiang Scholars and Innovative Research Team in University [IRT0719]
- National Natural Science Foundation of China [50808073, 50978088, 51008121, 51039001]
- Ministry of Education of China [NCET-08]
- Xiangjiang Water Environmental Pollution Control Project Subjected to the National Key Science and Technology Project for Water Environmental Pollution Control [2009ZX0 7212-001-02, 2009ZX0 7212-001-06]
- Hunan Key Scientific Research Project [2009FJ1010]
- Hunan Provincial Natural Science Foundation of China [10JJ7005]
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Single and simultaneous removal of Cd2+ and methylene blue (MB) with sodium dodecyl sulfate (SOS) by micellar-enhanced ultrafiltration under different experimental conditions was investigated. In single removal process, with initial SDS concentration increasing, the removal efficiency of Cd2+. and MB kept increasing and then decreased. When the initial concentrations of SDS and Cd2+ were 1.0 cmc and 50 mg L-1, respectively, the maximum removal efficiency of Cd2+ was obtained as 99.2%. Removal efficiency of MB could achieve more than 99.9% with initial SDS concentration below 2.0 cmc. As compared with single Cd2+ removal, the removal efficiency of Cd2+ in the presence of MB was slightly higher with initial SOS concentration below 1.0 cmc, while decreased with the SDS concentration above 1.0 cmc. The maximum removal efficiency of Cd2+ was 98.8% when initial concentrations of SOS and MB were 1.0 cmc and 4 mg L-1, respectively. The removal efficiency of MB in the presence of Cd2+ could achieve higher than 96.5%, which was only 3.4% less than the optimum result of the single removal. Meanwhile, effect of pH on removal efficiency of Cd2+ was more significant than that of MB. (C) 2010 Published by Elsevier B.V.
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