HAN Qian;LIU Zhiming;YANG Xiaoqin;LIN Zhe;QIN Zhihong;KONG Weiwei;

• 1:School of Chemical Engineering and Technology
• 2:China University of Mining and Technology
• 3:Jiangsu Alwater Environmental Technology Co.
• 4:Ltd.

Abstract：

Coal is high-quality raw material for carbon membrane due to its high carbon content, abundant reserves, and affordable availability. Coal-based carbon membrane using coal as raw material for wastewater treatment has advantages of high separation efficiency for a variety of wastewater, simple process operation, good repeatability, and can be used for large-scale industrial treatment. Although coal-based carbon membrane can remove pollutants with sizes of about 0.05-10.00 μm in the wastewater by screening and adsorption, the removal of organic pollutants and heavy metal ions with particle size much smaller than the membrane pore is limited. Moreover, the single coal-based carbon membrane separation will face the problems such as reduced separation capacity and fouling resistance ability due to the adsorption and accumulation of pollutants on the external and internal surfaces of the membrane after long-term operation. Therefore, by choosing specific coal-based carbon precursor, appropriate support and additives as raw materials, as well as optimizing the preparation process conditions, the goal of improving the pore size and distribution of carbon membranes and enhancing the hydrophilicity is achieved. At the same time, by utilizing the electrical conductivity of coal-based carbon membrane, and the methods of coupling with electrochemical or advanced oxidation processes are adopt on the basis of traditional carbon membrane separation process to improve the ability of treating various wastewater and solve the membrane pollution problem, such as electrochemical oxidation, electroadsorption, electroflotation and electrofenton oxidation. These coupling technologies can improve membrane separation efficiency, enhance membrane fouling resistance and reduce energy consumption, which are new developments of coal-based carbon membrane application in wastewater treatment and are of great significance for efficient and clean utilization of coal and industrial wastewater treatment. The preparation of coal-based carbon membrane in recent ten years and the principle, characteristics and research progress of electrochemical or advanced oxidation processes coupled membrane separation technology applied to wastewater treatment were reviewed from the above aspects, and the future research direction of coal based carbon membranes for wastewater treatment was prospected.

Key Words： coal-carbon membrane;preparation;coupling process;anti-fouling ability;wastewater treatment

Abstract:

Keywords:

Foundation: 国家自然科学基金资助项目(21706276)

Authors: HAN Qian;LIU Zhiming;YANG Xiaoqin;LIN Zhe;QIN Zhihong;KONG Weiwei;

DOI: 10.13226/j.issn.1006-6772.22080401

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