Synthesis of asymmetrical cellulose acetate/cellulose triacetate forward osmosis membrane: Optimization

Guan-Jie Chen; Duu-Jong Lee

doi:10.1016/j.jtice.2018.10.031

Synthesis of asymmetrical cellulose acetate/cellulose triacetate forward osmosis membrane : Optimization

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

Overview

28 Scopus Citations

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Author(s)

Guan-Jie Chen
Duu-Jong Lee

Detail(s)

Original language	English
Pages (from-to)	299-304
Journal / Publication	Journal of the Taiwan Institute of Chemical Engineers
Volume	96
Publication status	Published - 1 Mar 2019
Externally published	Yes

Link(s)

DOI	DOI https://doi.org/10.1016/j.jtice.2018.10.031 Final Published version
	Check@CityULib
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-85057400037&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(56d0400b-4786-4f02-94fb-d71c895bb842).html

Abstract

This study aims at identifying asymmetric cellulose acetate (CA)/cellulose triacetate (CTA) forward osmosis (FO) membranes that have high water flux (J _v ) and low reverse salt diffusion flux (J _s ) with acetic acid to replace the 1,4-dioxane for the mixed solvent for CA/CTA dissolution. The optimum fabrication parameters for the CA/CTA FO membranes are determined by using response surface methodology with a 4 ³ Box-Behnken design. Effects of weight fraction of CA (at CA/CTA = 2), spinning speed, annealing temperature and annealing time on the J _v and J _s are investigated. The optimum conditions to maximize the J _v to 6.4 L/m ² /h and minimize J _s to 0.47 g/m ² /h together are: 6%/3% CA/CTA, 2993 rpm spinning speed, 87.8 °C annealing temperature and 180 s annealing time. The fabricated FO membranes can reject over 99.9% heavy metal ions from feed wastewater and can be used as an effective barrier for alginate gels with easy flux recovery by ultrasound cleaning.

Research Area(s)

Forward osmosis, Membrane fabrication, Reverse salt diffusion, Surface response methodology, Water flux

SDG 6 - Clean Water and Sanitation

Bibliographic Note

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