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DOI: https://doi.org/10.4491/eer.2018.023
The roles of polyethersulfone and polyethylene glycol additive on nanofiltration of dyes and membrane morphologies
Abdul Rahman Hassan1,2, Sabariah Rozali1, Nurul Hannan Mohd Safari1, and Badrul Haswan Besar1
1East Coast Environmental Research Institute (ESERI), Universiti Sultan Zainal Abidin, Gong Badak Campus, 21300, Kuala Nerus, Terengganu, Malaysia
2Faculty of Industrial Design and Technology (FRIT), Universiti Sultan Zainal Abidin, Gong Badak Campus, 21300 Kuala Nerus, Terengganu, Malaysia
Corresponding Author: Abdul Rahman Hassan ,Tel: +60-9-668-8069 , Fax: +60-9-668-8707, Email: rahmanhassan@unisza.edu.my
Received: January 10, 2018;  Accepted: March 10, 2018.
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In this study, the effects of polymer concentration and additive in the formation of asymmetric nanofiltration (NF) membrane were evaluated. The membrane fabrication was carried out via dry/wet phase inversion technique. A new formulation of dope solution with polymer concentration ranging between 17 wt% to 21 wt% and the present of additive was developed. The results show that the permeate flux gradually decreases as polymer concentration increased, until 2.5969 L/m²h and increased the rejection up to 98.7%. Addition of additive, polyethylene glycol 600 increased dyes rejection up to 99.8% and decreased the permeate flux to 3.6501 L/m2h. This indicates that the addition of polyethylene glycol additive led towards better membrane performance. The morphological characteristics of NF membrane were analysed using a Scanning Electron Microscopy.
Keywords: Additive | Dyes removal | Nanofiltration | Polymer concentration | Wastewater
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