Designing fouling-resistant clay-embedded polyelectrolyte multilayer membranes for wastewater effluent treatment

Oishi Sanyal, Zhiguo Liu, Jing Yu, Brooke M. Meharg, Joung Sook Hong, Wei Liao, Ilsoon Lee

Research output: Research - peer-reviewArticle

  • 12 Citations

Abstract

This work explores the applicability of clay-polyelectrolyte based hybrid thin films to develop fouling resistant membrane surfaces for wastewater treatment applications. Clay nanoplatelets were layered on a commercial polyethersulfone membrane in conjunction with two oppositely charged polyelectrolytes via the aqueous-based layer-by-layer (LbL) assembly technique. These hybrid nanostructured membranes showed a high degree of fouling resistance as compared to other commercial membranes and the pure polyelectrolyte multilayer (PEM) membranes, when tested against an electrocoagulation-treated high strength wastewater. With the deposition of just 2.25 quadlayers, the clay-PEM (c-PEM) membranes demonstrated good anti-fouling properties. On crosslinking the polyelectrolytes, the c-PEM hybrid membranes showed higher reduction in the chemical oxygen demand (COD) value and enhanced fouling resistance as compared to their uncrosslinked counterparts, the pure PEM membranes (both uncross linked and crosslinked) and the bare membrane. However, the high fouling resistance of the c-PEM membranes was attained at the cost of compromising the high initial flux value of the underlying membrane. Several possible optimization strategies have therefore been suggested in this paper, which can potentially increase the flux of the modified membranes. This work, for the first time, demonstrated an attempt to evaluate the performance of clay-polyelectrolyte nanocomposite membranes against a real wastewater effluent.

LanguageEnglish (US)
Pages21-28
Number of pages8
JournalJournal of Membrane Science
Volume512
DOIs
StatePublished - Aug 15 2016

Profile

Effluent treatment
Fouling
Polyelectrolytes
Multilayers
Wastewater
Membranes
clay
Clay
Waste Water
Therapeutics
fouling
effluents
clays
membranes
Fluxes
Chemical oxygen demand
Wastewater treatment
Crosslinking
Effluents
Nanocomposites

Keywords

  • Clay nanoplatelets
  • Effluent treatment
  • Fouling resistance
  • Layer-by-layer assembly
  • Membranes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Materials Science(all)
  • Biochemistry
  • Filtration and Separation

Cite this

Designing fouling-resistant clay-embedded polyelectrolyte multilayer membranes for wastewater effluent treatment. / Sanyal, Oishi; Liu, Zhiguo; Yu, Jing; Meharg, Brooke M.; Hong, Joung Sook; Liao, Wei; Lee, Ilsoon.

In: Journal of Membrane Science, Vol. 512, 15.08.2016, p. 21-28.

Research output: Research - peer-reviewArticle

Sanyal, Oishi ; Liu, Zhiguo ; Yu, Jing ; Meharg, Brooke M. ; Hong, Joung Sook ; Liao, Wei ; Lee, Ilsoon. / Designing fouling-resistant clay-embedded polyelectrolyte multilayer membranes for wastewater effluent treatment. In: Journal of Membrane Science. 2016 ; Vol. 512. pp. 21-28
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