期刊
JOURNAL OF WATER PROCESS ENGINEERING
卷 11, 期 -, 页码 55-59出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jwpe.2016.03.002
关键词
PCB recycling unit wastewater; D2EHPA; Surfactant emulsion membrane; Removal of Pb(II); Effect of NaCl
资金
- DRDO, New Delhi, India [ERIP/ER/1003883/M/01/908/2012/D, RD/1416]
- DRDO
The present manuscript discusses the removal of Pb(II) from printed circuit board (PCB) wastewater by using surfactant emulsion membrane (SEM) in the presence of NaCl. This SEM was prepared by stirring together the strip phase (sulphuric acid) and organic phase (surfactant: Span 80, extractant: D2EHPA, diluent: n-Hexane) using high speed homogenizer. The feed phase consisting of various metal ions (Na, Ca, Mg, Co, Zn, Mn, W and Pb) was treated with emulsion phase by maintaining a treat ratio 1:10. The parameters such as the extractant concentration, internal phase concentration and contact time were studied and optimized. Further, the effect of addition of NaCl salt to the feed phase was considered using the optimized parameters. A significant improvement of extraction efficiency of 99% was observed in the presence of NaCl with more than 2.5 times enrichment as compared to 82% extraction with 1 times enrichment in the absence of salt. Thus, the NaCl addition has a remarkable effect on the selective removal of Pb(II) from wastewater. (C) 2016 Elsevier Ltd. All rights reserved.
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