Role of membrane and compound properties in affecting the rejection of pharmaceuticals by different RO/NF membranes

Yang ying Zhao, Fan xin Kong, Zhi Wang, Hong wei Yang, Xiao mao Wang, Yuefeng F. Xie, T. David Waite

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

This study was conducted to assess the merits and limitations of various high-pressure membranes, tight nanofiltration (NF) membranes in particular, for the removal of trace organic compounds (TrOCs). The performance of a low-pressure reverse osmosis (LPRO) membrane (ESPA1), a tight NF membrane (NF90) and two loose NF membranes (HL and NF270) was compared for the rejection of 23 different pharmaceuticals (PhACs). Efforts were also devoted to understand the effect of adsorption on the rejection performance of each membrane. Difference in hydrogen bond formation potential (HFP) was taken into consideration. Results showed that NF90 performed similarly to ESPA1 with mean rejection higher than 95%. NF270 outperformed HL in terms of both water permeability and PhAC rejection higher than 90%. Electrostatic effects were more significant in PhAC rejection by loose NF membranes than tight NF and LPRO membranes. The adverse effect of adsorption on rejection by HL and ESPA1 was more substantial than NF270 and NF90, which could not be simply explained by the difference in membrane surface hydrophobicity, selective layer thickness or pore size. The HL membrane had a lower rejection of PhACs of higher hydrophobicity (log D>0) and higher HFP (>0.02). Nevertheless, the effects of PhAC hydrophobicity and HFP on rejection by ESPA1 could not be discerned. Poor rejection of certain PhACs could generally be explained by aspects of steric hindrance, electrostatic interactions and adsorption. High-pressure membranes like NF90 and NF270 have a high promise in TrOC removal from contaminated water. [Figure not available: see fulltext.].

Original languageEnglish (US)
Article number20
JournalFrontiers of Environmental Science and Engineering
Volume11
Issue number6
DOIs
StatePublished - Dec 1 2017

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drug
membrane
hydrophobicity
hydrogen
adsorption
low pressure
organic compound
permeability
water
effect

All Science Journal Classification (ASJC) codes

  • Environmental Science(all)

Cite this

Zhao, Yang ying ; Kong, Fan xin ; Wang, Zhi ; Yang, Hong wei ; Wang, Xiao mao ; Xie, Yuefeng F. ; Waite, T. David. / Role of membrane and compound properties in affecting the rejection of pharmaceuticals by different RO/NF membranes. In: Frontiers of Environmental Science and Engineering. 2017 ; Vol. 11, No. 6.
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abstract = "This study was conducted to assess the merits and limitations of various high-pressure membranes, tight nanofiltration (NF) membranes in particular, for the removal of trace organic compounds (TrOCs). The performance of a low-pressure reverse osmosis (LPRO) membrane (ESPA1), a tight NF membrane (NF90) and two loose NF membranes (HL and NF270) was compared for the rejection of 23 different pharmaceuticals (PhACs). Efforts were also devoted to understand the effect of adsorption on the rejection performance of each membrane. Difference in hydrogen bond formation potential (HFP) was taken into consideration. Results showed that NF90 performed similarly to ESPA1 with mean rejection higher than 95{\%}. NF270 outperformed HL in terms of both water permeability and PhAC rejection higher than 90{\%}. Electrostatic effects were more significant in PhAC rejection by loose NF membranes than tight NF and LPRO membranes. The adverse effect of adsorption on rejection by HL and ESPA1 was more substantial than NF270 and NF90, which could not be simply explained by the difference in membrane surface hydrophobicity, selective layer thickness or pore size. The HL membrane had a lower rejection of PhACs of higher hydrophobicity (log D>0) and higher HFP (>0.02). Nevertheless, the effects of PhAC hydrophobicity and HFP on rejection by ESPA1 could not be discerned. Poor rejection of certain PhACs could generally be explained by aspects of steric hindrance, electrostatic interactions and adsorption. High-pressure membranes like NF90 and NF270 have a high promise in TrOC removal from contaminated water. [Figure not available: see fulltext.].",
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Role of membrane and compound properties in affecting the rejection of pharmaceuticals by different RO/NF membranes. / Zhao, Yang ying; Kong, Fan xin; Wang, Zhi; Yang, Hong wei; Wang, Xiao mao; Xie, Yuefeng F.; Waite, T. David.

In: Frontiers of Environmental Science and Engineering, Vol. 11, No. 6, 20, 01.12.2017.

Research output: Contribution to journalArticle

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