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Indexed by:期刊论文

Date of Publication:2018-08-01

Journal:JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS

Included Journals:SCIE

Volume:89

Page Number:39-48

ISSN No.:1876-1070

Key Words:Oily wastewater; Carbon membrane; Diatomite; Modification; Incorporation

Abstract:High performance diatomite hybrid microfiltration carbon membranes (MFCMs) were developed for oil removal from oily wastewater. The thermal stability, functional groups, microstructure, morphology of the membranes were analyzed by thermogravimetric analysis, Fourier transform infrared spectroscopy, X-ray diffraction and scanning electron microscope, respectively. The effects of diatomite amount, oil concentration, operation time and regeneration on the removal efficiency of MFCMs were investigated. Results show that the addition of diatomite can effectively adjust the microstructure and property of MFCMs. The oil rejection elevates by increasing the diatomite amount in starting materials or the oil concentration in feed stream. The maximum oil rejection is achieved at 98.2% for 200 mg/L oily wastewater using MFCMs prepared from the precursors with diatomite content of 15 wt%, together with all the oil concentration beneath 10 mg/L in the penetrating stream within the scope of this work. After regeneration of MFCMs by simple water backwashing, the permeation flux could be almost completely recovered. (C) 2018 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.