UV radiation pretreatment for reverse osmosis (RO) process in ultrapure water (UPW) production

Yongxun Jin; Hyunkyung Lee; Min Zhan; Seungkwan Hong

doi:10.1016/j.desal.2018.04.019

UV radiation pretreatment for reverse osmosis (RO) process in ultrapure water (UPW) production

Yongxun Jin
, Hyunkyung Lee
, Min Zhan
, Seungkwan Hong^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

32 Citations (Scopus)

Abstract

In ultrapure water (UPW) production, ultraviolet (UV) radiation is an effective process for reducing microorganisms and organic matter. An increasing trend of reusing the spent UPW further encourages the adoption of UV at the upstream of reverse osmosis (RO) to mitigate membrane fouling and to enhance water quality. In this study, UV technology, both low and medium pressure lamps, was assessed for RO pretreatment in UPW production. The fouling potential of problematic pollutants (e.g., silica and IPA) was evaluated pre and post UV treatment based on fouling index under constant flux mode. We found that the rejection rate of IPA was enhanced up to 80% and thus reduced the organic fouling potential in RO. On the contrary, for inorganic nano-particle such as silica, a significant increase in fouling potential after UV exposure was observed. Zeta and small angle X-ray scattering analysis implied that this fouling potential transition was derived from silica particle agglomeration under UV radiation. The RO fouling tests corroborated findings from fouling index measurements, showing severe flux decline after UV radiation. This research provides new insight for UPW production design by revealing the influence of UV on inorganic and organic pollutants during the reclamation of spent UPW.

Original language	English
Pages (from-to)	138-146
Number of pages	9
Journal	Desalination
Volume	439
DOIs	https://doi.org/10.1016/j.desal.2018.04.019
Publication status	Published - 2018 Aug 1

Bibliographical note

Funding Information:
This research was supported by a grant from Technology Innovation Program ( 10052814 , Technology development of ultra-pure water process for semiconductor level industrial water and localization for 4 kinds of consumable material) funded by the Ministry of Trade, Industry and Energy, South Korea . CE cellulose acetate FDR flux decline rate IPA isopropanol alcohol LP low pressure lamp LMW low molecular weight MF microfiltration MFI modified fouling index (s/L 2 ) MFI 0.45 modified fouling index using a 0.45 μm membrane filter (s/L 2 ) MFI-UF modified fouling index ultrafiltration (s/L 2 ) MFI-UF flux modified fouling index measured under constant flux condition (s/L 2 ) MFI-UF pres modified fouling index measured under constant pressure condition (s/L 2 ) MP medium pressure lamp RO reverse osmosis SAXS small angle X-ray scattering SDI Silt Density Index (%/min) TMP transmembrane pressure (Pa) TOC total organic matter (ppm) UPW ultrapure water UV ultraviolet

Keywords

Membrane fouling
Modified fouling index (MFI)
Reverse osmosis (RO)
Ultrapure water (UPW)
Ultraviolet (UV)

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
General Materials Science
Water Science and Technology
Mechanical Engineering

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10.1016/j.desal.2018.04.019

Cite this

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title = "UV radiation pretreatment for reverse osmosis (RO) process in ultrapure water (UPW) production",

abstract = "In ultrapure water (UPW) production, ultraviolet (UV) radiation is an effective process for reducing microorganisms and organic matter. An increasing trend of reusing the spent UPW further encourages the adoption of UV at the upstream of reverse osmosis (RO) to mitigate membrane fouling and to enhance water quality. In this study, UV technology, both low and medium pressure lamps, was assessed for RO pretreatment in UPW production. The fouling potential of problematic pollutants (e.g., silica and IPA) was evaluated pre and post UV treatment based on fouling index under constant flux mode. We found that the rejection rate of IPA was enhanced up to 80\% and thus reduced the organic fouling potential in RO. On the contrary, for inorganic nano-particle such as silica, a significant increase in fouling potential after UV exposure was observed. Zeta and small angle X-ray scattering analysis implied that this fouling potential transition was derived from silica particle agglomeration under UV radiation. The RO fouling tests corroborated findings from fouling index measurements, showing severe flux decline after UV radiation. This research provides new insight for UPW production design by revealing the influence of UV on inorganic and organic pollutants during the reclamation of spent UPW.",

keywords = "Membrane fouling, Modified fouling index (MFI), Reverse osmosis (RO), Ultrapure water (UPW), Ultraviolet (UV)",

author = "Yongxun Jin and Hyunkyung Lee and Min Zhan and Seungkwan Hong",

note = "Funding Information: This research was supported by a grant from Technology Innovation Program ( 10052814 , Technology development of ultra-pure water process for semiconductor level industrial water and localization for 4 kinds of consumable material) funded by the Ministry of Trade, Industry and Energy, South Korea . CE cellulose acetate FDR flux decline rate IPA isopropanol alcohol LP low pressure lamp LMW low molecular weight MF microfiltration MFI modified fouling index (s/L 2 ) MFI 0.45 modified fouling index using a 0.45 μm membrane filter (s/L 2 ) MFI-UF modified fouling index ultrafiltration (s/L 2 ) MFI-UF flux modified fouling index measured under constant flux condition (s/L 2 ) MFI-UF pres modified fouling index measured under constant pressure condition (s/L 2 ) MP medium pressure lamp RO reverse osmosis SAXS small angle X-ray scattering SDI Silt Density Index (\%/min) TMP transmembrane pressure (Pa) TOC total organic matter (ppm) UPW ultrapure water UV ultraviolet ",

year = "2018",

month = aug,

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doi = "10.1016/j.desal.2018.04.019",

language = "English",

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AU - Jin, Yongxun

AU - Lee, Hyunkyung

AU - Zhan, Min

AU - Hong, Seungkwan

N1 - Funding Information: This research was supported by a grant from Technology Innovation Program ( 10052814 , Technology development of ultra-pure water process for semiconductor level industrial water and localization for 4 kinds of consumable material) funded by the Ministry of Trade, Industry and Energy, South Korea . CE cellulose acetate FDR flux decline rate IPA isopropanol alcohol LP low pressure lamp LMW low molecular weight MF microfiltration MFI modified fouling index (s/L 2 ) MFI 0.45 modified fouling index using a 0.45 μm membrane filter (s/L 2 ) MFI-UF modified fouling index ultrafiltration (s/L 2 ) MFI-UF flux modified fouling index measured under constant flux condition (s/L 2 ) MFI-UF pres modified fouling index measured under constant pressure condition (s/L 2 ) MP medium pressure lamp RO reverse osmosis SAXS small angle X-ray scattering SDI Silt Density Index (%/min) TMP transmembrane pressure (Pa) TOC total organic matter (ppm) UPW ultrapure water UV ultraviolet

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N2 - In ultrapure water (UPW) production, ultraviolet (UV) radiation is an effective process for reducing microorganisms and organic matter. An increasing trend of reusing the spent UPW further encourages the adoption of UV at the upstream of reverse osmosis (RO) to mitigate membrane fouling and to enhance water quality. In this study, UV technology, both low and medium pressure lamps, was assessed for RO pretreatment in UPW production. The fouling potential of problematic pollutants (e.g., silica and IPA) was evaluated pre and post UV treatment based on fouling index under constant flux mode. We found that the rejection rate of IPA was enhanced up to 80% and thus reduced the organic fouling potential in RO. On the contrary, for inorganic nano-particle such as silica, a significant increase in fouling potential after UV exposure was observed. Zeta and small angle X-ray scattering analysis implied that this fouling potential transition was derived from silica particle agglomeration under UV radiation. The RO fouling tests corroborated findings from fouling index measurements, showing severe flux decline after UV radiation. This research provides new insight for UPW production design by revealing the influence of UV on inorganic and organic pollutants during the reclamation of spent UPW.

AB - In ultrapure water (UPW) production, ultraviolet (UV) radiation is an effective process for reducing microorganisms and organic matter. An increasing trend of reusing the spent UPW further encourages the adoption of UV at the upstream of reverse osmosis (RO) to mitigate membrane fouling and to enhance water quality. In this study, UV technology, both low and medium pressure lamps, was assessed for RO pretreatment in UPW production. The fouling potential of problematic pollutants (e.g., silica and IPA) was evaluated pre and post UV treatment based on fouling index under constant flux mode. We found that the rejection rate of IPA was enhanced up to 80% and thus reduced the organic fouling potential in RO. On the contrary, for inorganic nano-particle such as silica, a significant increase in fouling potential after UV exposure was observed. Zeta and small angle X-ray scattering analysis implied that this fouling potential transition was derived from silica particle agglomeration under UV radiation. The RO fouling tests corroborated findings from fouling index measurements, showing severe flux decline after UV radiation. This research provides new insight for UPW production design by revealing the influence of UV on inorganic and organic pollutants during the reclamation of spent UPW.

KW - Membrane fouling

KW - Modified fouling index (MFI)

KW - Reverse osmosis (RO)

KW - Ultrapure water (UPW)

KW - Ultraviolet (UV)

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UR - https://www.scopus.com/pages/publications/85046371442#tab=citedBy

U2 - 10.1016/j.desal.2018.04.019

DO - 10.1016/j.desal.2018.04.019

M3 - Article

AN - SCOPUS:85046371442

SN - 0011-9164

VL - 439

SP - 138

EP - 146

JO - Desalination

JF - Desalination

ER -

UV radiation pretreatment for reverse osmosis (RO) process in ultrapure water (UPW) production

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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