Nanofiltration membranes for salt and dye filtration: effect of membrane properties on performances

Meltem Agtaş, Türkan Ormancı-Acar, Başak Keskin, Türker Türken, Ismail Koyuncu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)

Abstract

In this study, commercial nanofiltration membranes (Toray, NF 270, Desal 5 L) were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, optical profilometry, contact angle, mechanical strength and zeta potential measurements. Filtration performance tests were conducted with distilled water, MgSO4 solution and synthetic dye solutions, respectively. Among three commercial membranes, the Toray membrane was thought to be better choice. Additional experiments were carried out for a more detailed characterization of the selected membrane. Therefore, firstly, flux and removal efficiency was monitored by using dye solutions at different pH values, and then experiments were carried out to observe the effect of different temperatures. Also, another filtration test with NaCl solution was performed for the Toray membrane. As the main purpose of this study, we aimed to establish a significant correlation between the structural properties of membranes and their performances. In light of the results obtained, it was observed that the contact angle, mechanical strength and surface roughness values of the membrane significantly affected the membrane performance. It was concluded that the most important parameter in dye removal was the zeta potential. As a result of this work, a data set of commercial membranes was created and is available to all membrane users.

Original languageEnglish
Pages (from-to)2146-2159
Number of pages14
JournalWater Science and Technology
Volume83
Issue number9
DOIs
Publication statusPublished - 1 May 2021

Bibliographical note

Publisher Copyright:
© 2021 The Authors Water Science & Technology

Funding

This work was supported by the Scientific and Technological Research Council of Turkey (TUBİTAK). Project number: 113Y371.

FundersFunder number
TUBİTAK113Y371
Türkiye Bilimsel ve Teknolojik Araştirma Kurumu

    Keywords

    • Dye removal
    • Membrane characterization
    • Nanofiltration
    • commercial membranes

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