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author:

Meng, Qing-Wei (Meng, Qing-Wei.) [1] | Ge, Qingchun (Ge, Qingchun.) [2]

Indexed by:

EI

Abstract:

Poor resistance to free chlorine severely impairs the service of conventional polyamide (PA) membrane in water treatment. Here we design a series of superhydrophilic aromatic sulfonate materials (ASMs) comprising successively increasing conjugated systems and ionizable groups (ASM-1, ASM-2, ASM-3) to develop a chlorine-resistant membrane via chemical modification. By altering the membrane physicochemical properties and surface structure, ASMs substantially improve the chlorine resistance and water permeability of membrane. With 0.5 M NaCl as the draw solution, all ASMs enhance membrane water fluxes by more than 60% relative to those of the nascent PA membrane in forward osmosis (FO) processes. After exposed to a 1000 ppm sodium hypochlorite solution for 2-8 h, the modified membranes exhibit smaller variations in FO performance than the PA membrane. Having the largest conjugated system and the most sulfonate groups, ASM-3 enables the membrane to sustain a chlorination strength of up to 8000 ppm·h with an insignificant NaCl loss during the FO process, surpassing other recently developed PA membranes in chlorine resistance. These results manifest that the combination of a large conjugated system and ionizable group is key for imbuing membrane with excellent chlorine resistance and water permeability. Copyright © 2020 American Chemical Society.

Keyword:

Chemical modification Chemical resistant materials Chemicals removal (water treatment) Chlorine Membranes Osmosis Physicochemical properties Sodium chloride Superhydrophilicity Surface structure

Community:

  • [ 1 ] [Meng, Qing-Wei]College of Environment and Resources, Fuzhou University, Fujian; 350116, China
  • [ 2 ] [Ge, Qingchun]College of Environment and Resources, Fuzhou University, Fujian; 350116, China

Reprint 's Address:

  • [ge, qingchun]college of environment and resources, fuzhou university, fujian; 350116, china

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Source :

ACS Applied Materials and Interfaces

ISSN: 1944-8244

Year: 2020

Issue: 31

Volume: 12

Page: 35393-35402

9 . 2 2 9

JCR@2020

8 . 5 0 0

JCR@2023

ESI HC Threshold:196

JCR Journal Grade:1

CAS Journal Grade:2

Cited Count:

WoS CC Cited Count: 0

SCOPUS Cited Count: 28

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 2

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