Publication Date:
2017-10-25
Description:
The present study investigates the selective separation mechanisms of three textile dyes with 2000 ppm of NaCl solution by nanofiltration membranes during brine recovery at three different pH medium pH-3, pH-7 and pH 10 respectively. Tests were performed with the purpose of relating flux decline, brine recovery and dye rejection behavior to membrane characteristics (Molecular weight cutoff, contact angle, zeta potential), charge of the dye molecules, and solution chemistry. Salt-organic separation factor was estimated in order to rank and choose the most suitable NF membranes for brine recovery with high degree of flux. Out of these membranes tested in this study, only NF-270 was capable of operating up to 56-70% brine recovery with high flux ranging from 78.07 to 114.80 Lh -1 m -2 .
Print ISSN:
0930-7516
Electronic ISSN:
1521-4125
Topics:
Chemistry and Pharmacology
,
Process Engineering, Biotechnology, Nutrition Technology
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