The role of solubility on the rejection of trace organics by nanofiltration membrane

exemplified with disinfection by-products

Fan xin Kong, Xiao mao Wang, Hong wei Yang, Jin fu Chen, Chun mei Guo, Tong Zhang, Yuefeng F. Xie

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Interactions of trace organic compounds (TOrCs) with polymeric nanofiltration (NF) membrane can affect their rejection. It is desirable to investigate whether solubility which depends on the free energy of interaction between these solutes and water correlates with rejection/adsorption and the potential to be incorporated in the partitioning terms of current NF model. A total of ten neutral disinfection by-products (DBPs) were selected as the model compounds for TOrCs to comprehensively investigate the role of solubility on rejection and adsorption. Pearson correlation analysis indicated that the correlation between MW and rejection ratio was highly significant (r = 0.778, p = 0.008) and that between solubility and rejection ratio was moderately significant (r = −0.636, p = 0.48) in a cross-flow system. By fitting Freundlich equation from adsorption isotherm experiment, the adsorption affinity (Kf) of DBPs was roughly correlated with their solubility with regard to the comparison of n value with 1. α was then introduced as a parameter of solute-membrane interaction from the perspective of partitioning term in the hydrodynamic model. Exponential relationship can be observed between the solubility and α, demonstrating the possibility of incorporating solubility into the partitioning terms in NF model to accurately predict the rejection of DBPs.

Original languageEnglish (US)
Pages (from-to)18400-18409
Number of pages10
JournalEnvironmental Science and Pollution Research
Volume24
Issue number22
DOIs
StatePublished - Aug 1 2017

Fingerprint

Nanofiltration membranes
Disinfection
disinfection
Solubility
Byproducts
solubility
membrane
Adsorption
Membranes
adsorption
Nanofiltration
partitioning
Organic compounds
solute
organic compound
Polymeric membranes
Hydrodynamics
Adsorption isotherms
Free energy
by-product

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Pollution
  • Health, Toxicology and Mutagenesis

Cite this

Kong, Fan xin ; Wang, Xiao mao ; Yang, Hong wei ; Chen, Jin fu ; Guo, Chun mei ; Zhang, Tong ; Xie, Yuefeng F. / The role of solubility on the rejection of trace organics by nanofiltration membrane : exemplified with disinfection by-products. In: Environmental Science and Pollution Research. 2017 ; Vol. 24, No. 22. pp. 18400-18409.
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The role of solubility on the rejection of trace organics by nanofiltration membrane : exemplified with disinfection by-products. / Kong, Fan xin; Wang, Xiao mao; Yang, Hong wei; Chen, Jin fu; Guo, Chun mei; Zhang, Tong; Xie, Yuefeng F.

In: Environmental Science and Pollution Research, Vol. 24, No. 22, 01.08.2017, p. 18400-18409.

Research output: Contribution to journalArticle

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