Unlocking the potentialities of biomass-based cellulose acetate membrane from waste rice husk for water treatment
Document Type
Article
Publication Date
7-1-2024
Abstract
Open burning of rice husk as one of the waste disposal methods could contribute to the increase of greenhouse gas emissions and eventually worsen the global warming. This article reports the potentialities of converting waste rice husk into water filtration membrane as one of the biomass valorization technologies. Pure cellulose acetate (CA) membranes were fabricated from waste rice husk (RH) through extraction, acetylation and phase inversion process. Cellulose was extracted from RH before being acetylated with acetic anhydride. CA with degree of substitution and acetyl percentage of 2.71 and 41.24% was recorded, respectively. Using phase inversion method, CA membranes were fabricated with increasing CA concentration from 5 to 15%. The pure water flux, porosity, mean pore size and water contact angle were characterized from the synthesized membranes. The performance of CA membrane was addressed by methylene blue separation. The results showed that the pure water permeability was up to 171 L/m2barh and the dye rejection efficiency achieved up to 92%. This study provides a novel insight for future studies on waste biomass valorization, specifically RH, toward its high-value applications in sustainable and low-cost membrane fabrication for water treatment.
Keywords
Rice husk, Cellulose, Cellulose acetate, Membrane, Water treatment
Divisions
sch_che
Funders
Institut Pengurusan dan Pemantauan Penyelidikan, Universiti Malaya (IIRG003B-2021IISS),Universiti Malaya Impact-oriented Interdisciplinary Research Grant
Publication Title
Chemical Papers
Volume
78
Issue
10
Publisher
Springer
Publisher Location
GEWERBESTRASSE 11, CHAM, CH-6330, SWITZERLAND