SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2023, Vol. 60 ›› Issue (8): 253-261.DOI: 10.1016/j.cjche.2023.01.021

• Full Length Article • 上一篇    下一篇

Graphene oxide/hydrotalcite modified polyethersulfone nanohybrid membrane for the treatment of lead ion from battery industrial effluent

Sinu Poolachira, Sivasubramanian Velmurugan   

  1. Department of Chemical Engineering, National Institute of Technology Calicut, Calicut 673 601, India
  • 收稿日期:2022-08-29 修回日期:2023-01-22 出版日期:2023-08-28 发布日期:2023-10-28
  • 通讯作者: Sivasubramanian Velmurugan,E-mail:siva@nitc.ac.in

Graphene oxide/hydrotalcite modified polyethersulfone nanohybrid membrane for the treatment of lead ion from battery industrial effluent

Sinu Poolachira, Sivasubramanian Velmurugan   

  1. Department of Chemical Engineering, National Institute of Technology Calicut, Calicut 673 601, India
  • Received:2022-08-29 Revised:2023-01-22 Online:2023-08-28 Published:2023-10-28
  • Contact: Sivasubramanian Velmurugan,E-mail:siva@nitc.ac.in

摘要: In the present study, polyethersulfone based nanohybrid membranes were effectively fabricated by incorporating graphene oxide (GO) and hydrotalcite (HT) nanosheets into the membrane structure. HT was prepared to overcome the irreversible agglomeration behavior of GO at a high concentration which affects the performance of the membranes. In particular, the shedding of HT in formamide provides a two-dimensional nanosheet with a higher positive charge density to prevent the restacking of GO nanosheets. Here, exfoliated GO and HT with different combinations (1:1, 1:2 and 1:3) were infused in the membrane matrix to treat lead-acid battery effluent effectively. Finally, the hybrid membranes were characterized for hydrophilicity, mechanical strength and pure water flux. In combination with the superior properties of GO and HT, the prepared hybrid membranes can be used as effectively to improve the separation and permeation performance. The phase inversion process eliminated the leaching of nanoparticles from the membrane matrix. The reusability of the hybrid membrane was achieved using 0.1 mol?L-1 NaOH solution and reused without significant reduction in lead removal efficiency. The cost analysis of the membrane was also estimated from the lab study. Therefore, the present study suggested the selective and sustainable treatment of lead from a real-life effluent.

关键词: Nanohybrid membrane, Polyethersulfone, Graphene oxide, Hydrotalcite, Lead battery effluent, Reusability, Cost analysis

Abstract: In the present study, polyethersulfone based nanohybrid membranes were effectively fabricated by incorporating graphene oxide (GO) and hydrotalcite (HT) nanosheets into the membrane structure. HT was prepared to overcome the irreversible agglomeration behavior of GO at a high concentration which affects the performance of the membranes. In particular, the shedding of HT in formamide provides a two-dimensional nanosheet with a higher positive charge density to prevent the restacking of GO nanosheets. Here, exfoliated GO and HT with different combinations (1:1, 1:2 and 1:3) were infused in the membrane matrix to treat lead-acid battery effluent effectively. Finally, the hybrid membranes were characterized for hydrophilicity, mechanical strength and pure water flux. In combination with the superior properties of GO and HT, the prepared hybrid membranes can be used as effectively to improve the separation and permeation performance. The phase inversion process eliminated the leaching of nanoparticles from the membrane matrix. The reusability of the hybrid membrane was achieved using 0.1 mol?L-1 NaOH solution and reused without significant reduction in lead removal efficiency. The cost analysis of the membrane was also estimated from the lab study. Therefore, the present study suggested the selective and sustainable treatment of lead from a real-life effluent.

Key words: Nanohybrid membrane, Polyethersulfone, Graphene oxide, Hydrotalcite, Lead battery effluent, Reusability, Cost analysis