Rejection mechanism of ionic solute removal by nanofiltration membranes: An overview

Suhalim, Nur Syahirah and Kasim, Norherdawati and Mahmoudi, Ebrahim and Shamsudin, Intan Juliana and Mohammad, Abdul Wahab and Mohamed Zuki, Fathiah and Jamari, Nor Laili-Azua (2022) Rejection mechanism of ionic solute removal by nanofiltration membranes: An overview. Nanomaterials, 12 (3). ISSN 2079-4991, DOI

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The toxicity of heavy metals can cause water pollution and has harmful effects on human health and the environment. Various methods are used to overcome this pressing issue and each method has its own advantages and disadvantages. Membrane filtration technology such as nanofiltration (NF) produces high quality water and has a very small footprint, which results in lower energy usage. Nanofiltration is a membrane-based separation technique based on the reverse osmosis separation process developed in the 1980s. NF membranes have a pore size of 1 nm and molecular weight cut off (MWCO) of 300 to 500 Da. The properties of NF membranes are unique since the surface charge of the membranes is dependent on the functional groups of the membrane. The rejection mechanism of NF membrane is unique as it is a combination of various rejection mechanisms such as steric hindrance, electric exclusion, dielectric effect, and hydration mechanism. However, these mechanisms have not been studied in-depth due to their complexity. There are also many factors contributing to the rejection of NF membrane. Many junior researchers would face difficulty in studying NF membrane. Therefore, this paper is designed for researchers new to the field, and will briefly review the rejection mechanisms of NF membrane by both sieving and non-sieving separation processes. This mini-review aims to provide new researchers with a general understanding of the concept of the separation process of charged membranes.

Item Type: Article
Funders: Higher Education Center of Excellence (HICoE), Ministry of Higher Education, Malaysia [Grant No: RACER/1/2019/STG07/UPNM/1], Centre for Research Management and Innovation at the National Defence University of Malaysia (NDUM) [Grant No: UPNM/2019/GPJP/2/SG/2]
Uncontrolled Keywords: Nanofiltration; Size exclusion; Donnan exclusion; Membrane separation
Subjects: Q Science > QC Physics
Q Science > QD Chemistry
T Technology > T Technology (General)
Divisions: Faculty of Engineering > Department of Chemical Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 02 Aug 2022 04:24
Last Modified: 02 Aug 2022 04:24

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