标题: Dynamic pore modulation of contracted carbon fiber filter for wastewater treatment: Filtration performance and in-situ regeneration mechanism

作者: Xu, T (Xu, Tao); Shi, L (Shi, Lin); Shao, SL (Shao, Senlin); Wang, H (Wang, Hui); Huang, Y (Huang, Yu); Xing, L (Xing, Lei); Xia, R (Xia, Re); Rossi, R (Rossi, Ruggero); Zhu, LD (Zhu, Liandong); Zhu, H (Zhu, Hua); Yang, WL (Yang, Wulin); Mao, XH (Mao, Xuhui); Wang, X (Wang, Xu)

来源出版物: CHEMICAL ENGINEERING JOURNAL 卷: 473 文献号: 145243 DOI: 10.1016/j.cej.2023.145243 出版年: OCT 1 2023

摘要: Antifouling and selectivity are the major challenges in membrane separation technologies. Inspired by membranes with tunable pore sizes in filtration systems, we propose a contracted carbon fibrous filter (CCF) with an inversed-triangle structure (ITS) using commercial carbon fibers that can control the filter pore size by adjusting the external force loading. By increasing the force loading on fibers, CCF pores shrunk from 2.02 to 0.98 mu m, while maintaining a high rejection efficiency of kaolin particles (>99%) at a water flux ranging from 679.7 to 354.9 L m(-2) h(-1). The role of the ITS and the filtration mechanism of the carbon fibers was revealed via computational simulations and experimental results. Various cleaning strategies were explored to regenerate CCF performance after fouling. A mean flux recovery of 99.6% could be achieved during the nine-cycle filtration by adjusting the pore size combined with electrocleaning. Additionally, a removal mechanism for internal fouling was proposed. This study demonstrates that the novel CCF provides a simple and reliable strategy for wastewater filtration.

作者关键词: Wastewater filtration; Contracted carbon fiber; Pore size control; Flux recovery; Antifouling

地址: [Xu, Tao; Wang, Hui; Huang, Yu; Zhu, Liandong; Zhu, Hua; Mao, Xuhui; Wang, Xu] Wuhan Univ, Sch Resource & Environm Sci, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430072, Peoples R China.

[Xu, Tao; Mao, Xuhui] Wuhan Univ, State Key Lab Water Resources Hydropower Engn Sci, Wuhan 430072, Peoples R China.

[Shi, Lin] Wuhan Design & Res Inst Co Ltd, China Coal Technol & Engn Grp, Wuhan 430064, Peoples R China.

[Shao, Senlin] Wuhan Univ, Sch Civil Engn, Wuhan 430072, Peoples R China.

[Xing, Lei] Univ Surrey, Fac Engn & Phys Sci, Dept Chem & Proc Engn, Guildford GU2 7XH, England.

[Xia, Re] Wuhan Univ, Sch Power & Mech Engn, Wuhan 430079, Peoples R China.

[Rossi, Ruggero] Johns Hopkins Univ, Dept Environm Hlth & Engn, Baltimore, MD 21205 USA.

[Yang, Wulin] Peking Univ, Coll Environm Sci & Engn, Beijing 100871, Peoples R China.

[Mao, Xuhui; Wang, Xu] Wuhan Univ, Sch Resources & Environm Sci, Wuhan 430079, Peoples R China.

通讯作者地址: Mao, XH; Wang, X (通讯作者)，Wuhan Univ, Sch Resources & Environm Sci, Wuhan 430079, Peoples R China.

电子邮件地址: clab@whu.edu.cn; xu.wang@whu.edu.cn

影响因子：15.1