Theoretical and Experimental Study of Nanofiltration and Reverse Osmosis Membranes for Removal of Heavy Metals from Wastewater
International Journal of Science and Research (IJSR)

International Journal of Science and Research (IJSR)
www.ijsr.net | Open Access | Fully Refereed | Peer Reviewed International Journal

ISSN: 2319-7064



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Research Paper | Chemical Engineering | Iraq | Volume 6 Issue 12, December 2017

Theoretical and Experimental Study of Nanofiltration and Reverse Osmosis Membranes for Removal of Heavy Metals from Wastewater

Ahmed Faiq Al-Alawy, Miqat Hasan Salih

The present work aimed to study the efficiency of nanofiltration (NF) and reverse osmosis (RO) membrane for heavy metal removal from wastewater and study the factors affecting the performance of these two membranes feed concentrations for heavy metal ions, pressure, and flow rate. The experimental results showed, heavy metals concentration in permeate increase with raise in feed concentrations, decline with increase in flow rate. The raise of pressure, heavy metals concentration decreases for RO membrane, but for NF membrane the concentration decrease and then at high pressure increase. The rejection percentage for chromium in NF and RO is 99.7 % and 99.9 %, for copper is 98.4 % and 99.3 %, for zinc is 97.9 % and 99.5 %, for nickel is 97.2 % and 99.5 % respectively. For a synthetic electroplating wastewater, the maximum recovery was 70.7 % and 48.9 % for NF and RO respectively. In general, polyamide nanofiltration and reverse osmosis membranes give a high efficiency for removal of chromium, copper, nickel and zinc. A mathematical model describing the process with the existence of the effect of concentration polarization was studied. The agreement between theoretical and experimental results has an accuracy ranging from 86-99.4 % for NF and 93-99.9 % for RO.

Keywords: Nanofiltration, Reverse osmosis, Heavy metals, Electroplating wastewater, Mathematical model

Edition: Volume 6 Issue 12, December 2017

Pages: 778 - 788

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How to Cite this Article?

Ahmed Faiq Al-Alawy, Miqat Hasan Salih, "Theoretical and Experimental Study of Nanofiltration and Reverse Osmosis Membranes for Removal of Heavy Metals from Wastewater", International Journal of Science and Research (IJSR), https://www.ijsr.net/search_index_results_paperid.php?id=ART20178885, Volume 6 Issue 12, December 2017, 778 - 788

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