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ABSTRACT
With the continuous development of society, the demand for treating oily wastewater in oil fields to achieve resource recovery and reuse is becoming increasingly urgent. Membrane materials have become one of the most promising materials for treating oily wastewater due to their high separation efficiency and low energy consumption.Graphene and its derivatives have the characteristics of ultra-high water flux, special physical, chemical properties, adjustable layered structure, gradually becoming a new generation of membrane materials that can be used for sewage treatment. The interlayer transport channels of graphene oxide (GO) membranes can be artificially modified and regulated to achieve separation of oil-water emulsions. This article adopts the method of vacuum filtration to prepare a series of GO membranes. The experimental procedure is concise, with mild reaction conditions and simple operations. The ethylenediamine-modified graphene oxide (EGO) membrane exhibits the highest water flux (879.2 L/m2h), which is 1.5 times that of the original GO membrane. Moreover, the EGO membrane demonstrates remarkable oil-water separation capabilities, achieving separation efficiencies of over 90% for coal oil-in-water emulsions, petroleum ether-in-water emulsions, and lubricating oil-in-water emulsions. The separation efficiency for soybean oil-in-water emulsions is also around 80%. This study will provide new ideas for the treatment of oily wastewater
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Additional information
Notes on contributors
Li Cai
Li Cai, Currently pursuing a Ph.D. in Petroleum and Natural Gas Engineering at Northeast Petroleum University.The primary research focus is on the treatment of oil-containing wastewater.
Qingwang Liu
Qingwang Liu, obtained his Ph.D. degree from Zhejiang University in 2002. He is primarily engaged in theoretical research in oilfield chemistry, wastewater treatment, environmental chemistry, development of oilfield chemicals, and chemical technologies for increasing oil production and injection in oil and water wells.
Dandan Su
Dandan Su, Graduated from Wuhan University of Science and Technology with a Bachelor’s degree. Currently employed at the Downhole Services Company, CNPC Bohai Drilling Engineering Company Ltd, Renqiu, 062550, P.R. China as an engineer, specializing in oil and gas field development.
Zhenzhong Fan
Zhenzhong Fan, Graduating from Zhejiang University in 2005 with a Ph.D. in Chemistry, I subsequently served as a visiting scholar at the Missouri University of Science and Technology from January to December 2017. My research primarily focuses on theoretical studies in oilfield chemistry, development of drilling and production chemicals, and chemical technologies for enhanced oil recovery and well stimulation.
Qilei Tong
Qilei Tong, Currently pursuing a Ph.D. at Northeast Petroleum University, my primary research focus lies in the field of nanotechnology for enhanced oil recovery, aiming to increase oil production rates.
Yuanfeng Fu
Yuanfeng Fu, Currently pursuing a Ph.D. at Northeast Petroleum University, my primary research focus is on membrane separation technology.
Sanyuan Qiao
Sanyuan Qiao, In 2023, graduated from Northeast Petroleum University with a Doctorate in Engineering. Currently serving as a lecturer at Northeast Petroleum University, focusing on the preparation of hyperbranched polymers and their application in tertiary composite drive.