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Processing of alumina‐coated glass‐bonded silicon carbide membranes for oily wastewater treatment
Author(s) -
Kim Su Chang,
Yeom HeeJong,
Kim YoungWook,
Song InHyuck,
Ha JangHoon
Publication year - 2017
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12693
Subject(s) - materials science , silicon carbide , flexural strength , composite material , membrane , porosity , coating , porous glass , genetics , biology
Crack‐free γ‐Al 2 O 3 ‐coated glass‐bonded SiC membranes were successfully prepared using a simple heat‐treatment and dip‐coating process at a temperature as low as 850°C in air. The changes in the porosity, flexural strength, flux, and oil rejection rate of the membranes were investigated while changing the initial SiC particle size. Larger SiC particles led to bigger pores, resulting in higher flux in the oily water and a lower oil rejection rate. The SiC membranes with a support prepared from 10 μm SiC powder showed an exceptionally high oil rejection rate (99.9%) with a feed oil concentration of 600 mg/L at an applied pressure of 101 kPa. The typical porosity, flexural strength, steady state flux, and oil rejection rate of the alumina‐coated SiC membrane were ~45%, ~81 MPa, 1.78×10 −5 m 3 m −2 s −1 , and 99.9%, respectively.