relation: https://khub.utp.edu.my/scholars/12094/
title: Optimization and characterization of magnetite-reduced graphene oxide nanocomposites for demulsification of crude oil in water emulsion
creator: Wai, M.M.
creator: Khe, C.S.
creator: Yau, X.H.
creator: Liu, W.W.
creator: Sokkalingam, R.
creator: Jumbri, K.
creator: Lwin, N.
description: Oily wastewater from the oil and gas industry negatively affects the environment. Oily wastewater typically exists in the form of an oil-in-water emulsion. Conventional methods to treat oily wastewater have low separation efficiency and long separation time and use large equipment. Therefore, a simple but effective method must be developed to separate oil-in-water emulsions with high separation efficiency and short separation times. Magnetite-reduced graphene oxide (M-RGO) nanocomposites were used as a demulsifier in this work. Magnetite nanoparticles (Fe3O4) were coated on reduced graphene oxide (rGO) nanosheets via an in situ chemical synthesis method. The synthesized M-RGO nanocomposites are environmentally friendly and can be recovered after demulsification by an external magnetic field. M-RGO characterization was performed using X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, field emission scanning microscopy, Raman spectroscopy, and vibrating sample magnetometry. Demulsification performance was evaluated in terms of M-RGO dosage, effects of pH, and brine concentration. The demulsification capability of M-RGO was determined based on the residual oil content of the emulsion, which was measured with a UV-vis spectrometer. The response surface method was used to determine the optimum conditions of the input variables. The optimum demulsification efficiency achieved at pH 4 and M-RGO dosage of 29 g L-1 was approximately 96. This finding demonstrates that M-RGO nanocomposites are potential magnetic demulsifiers for oily wastewater that contains oil-in-water emulsions. Also, the recyclability of this nanocomposite has been tested and the results shown that it is a good recyclable demulsifier. © 2019 The Royal Society of Chemistry.
publisher: Royal Society of Chemistry
date: 2019
type: Article
type: PeerReviewed
identifier:   Wai, M.M. and Khe, C.S. and Yau, X.H. and Liu, W.W. and Sokkalingam, R. and Jumbri, K. and Lwin, N.  (2019) Optimization and characterization of magnetite-reduced graphene oxide nanocomposites for demulsification of crude oil in water emulsion.  RSC Advances, 9 (41).  pp. 24003-24014.  ISSN 20462069     
relation: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85070380832&doi=10.1039%2fc9ra03304a&partnerID=40&md5=0c436566e43962deea48163e0a5ba53d
relation: 10.1039/c9ra03304a
identifier: 10.1039/c9ra03304a