Enhanced management and antifouling performance of a novel NiFe-LDH@MnO2/PVDF hybrid membrane for efficient oily wastewater treatment

Kai Fan; Ning Kong; Jing Ma; Hongjun Lin; Chuanyang Gao; Jinshen Lei; Zihang Zeng; Jun Hu; Juncheng Qi; Liguo Shen

doi:10.1016/j.jenvman.2023.119922

Enhanced management and antifouling performance of a novel NiFe-LDH@MnO₂/PVDF hybrid membrane for efficient oily wastewater treatment

J Environ Manage. 2024 Feb:351:119922. doi: 10.1016/j.jenvman.2023.119922. Epub 2023 Dec 26.

Authors

Kai Fan¹, Ning Kong², Jing Ma³, Hongjun Lin⁴, Chuanyang Gao⁵, Jinshen Lei⁶, Zihang Zeng⁷, Jun Hu⁸, Juncheng Qi⁹, Liguo Shen¹⁰

Affiliations

¹ School of Architecture and Materials, Chongqing College of Electronic Engineering, Chongqing, 401331, China. Electronic address: fankai20022002@163.com.
² College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, 321004, China. Electronic address: ningkong@zjnu.edu.cn.
³ College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, 321004, China. Electronic address: JOJOMA@zjnu.edu.cn.
⁴ College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, 321004, China. Electronic address: hjlin@zjnu.cn.
⁵ School of Architecture and Materials, Chongqing College of Electronic Engineering, Chongqing, 401331, China. Electronic address: 376118174@qq.com.
⁶ School of Architecture and Materials, Chongqing College of Electronic Engineering, Chongqing, 401331, China. Electronic address: 1148319306@qq.com.
⁷ School of Architecture and Materials, Chongqing College of Electronic Engineering, Chongqing, 401331, China. Electronic address: 1915496783@qq.com.
⁸ Institute of Materiobiology, Department of Chemistry, College of Science, Shanghai University, Shanghai, 200444, China; Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China; Xiangfu Laboratory, Jiashan, 314102, China. Electronic address: hujun@sinap.ac.cn.
⁹ Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China; University of Chinese Academy of Sciences, Beijing, 100049, China. Electronic address: qijuncheng@sinap.ac.cn.
¹⁰ College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, 321004, China. Electronic address: lgshen@zjnu.cn.

PMID: 38150929
DOI: 10.1016/j.jenvman.2023.119922

Abstract

Layered double hydroxides (LDHs) have gained significant recognition for their facile synthesis and super-hydrophilic two-dimensional (2D) structure to fabricate antifouling membranes for oily wastewater separation. However, conventional PVDF membranes, due to their hydrophobic nature and inert matrix, often exhibit insufficient permeance and compatibility. In this study, a novel NiFe-LDH@MnO₂/PVDF membrane was synthesized using ultrasonic, redox, and microwave-hydrothermal processes. This innovative approach cultivated grass-like NiFe-LDH@MnO₂ nanoparticles within an inert PVDF matrix, promoting the growth of highly hydrophilic composites. The presence of NiFe-LDH@MnO₂ resulted in pronounced enhancements in surface morphology, interfacial wettability, and oil rejection for the fabricated membrane. The optimal NiFe-LDH@MnO₂/PVDF-2 membrane exhibited an extremely high pure water flux (1364 L m^-2•h^-1), and increased oil rejection (from 81.2% to 93.5%) without sacrificing water permeation compared to the original PVDF membrane. Additionally, the NiFe-LDH@MnO₂/PVDF membrane demonstrated remarkable antifouling properties, evident by an exceptional fouling resistance ratio of 96.8% following slight water rinsing. Mechanistic insights into the enhanced antifouling performance were elucidated through a comparative "semi-immersion" investigation. The facile synthesis method, coupled with the improved membrane performance, highlights the potential application prospects of this hybrid membrane in emulsified oily wastewater treatment and environmental remediation.

Keywords: MnO(2)-Doped; NiFe-LDH@MnO(2)/PVDF membrane; Oily wastewater; Sustainable purification; Tailored surface.

MeSH terms

Biofouling*
Fluorocarbon Polymers*
Manganese Compounds
Oils
Oxides
Polyvinyls*
Water
Water Purification* / methods

Substances

polyvinylidene fluoride
Manganese Compounds
Oxides
Oils
Water
Fluorocarbon Polymers
Polyvinyls