Retardation of wetting for membrane distillation by adjusting major components of seawater

Hye Won Kim; Taekgeun Yun; Seungkwan Hong; Seockheon Lee; Seongpil Jeong

doi:10.1016/j.watres.2020.115677

Retardation of wetting for membrane distillation by adjusting major components of seawater

Hye Won Kim, Taekgeun Yun, Seungkwan Hong, Seockheon Lee, Seongpil Jeong

School of Civil, Environmental and Architectural Engineering

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

23 Citations (Scopus)

Abstract

Wetting by fouling is phenomenon specific to membrane distillation (MD) and are regarded as challenges to the seawater membrane distillation (SWMD) process. To understand fouling and wetting, the influence of Mg and Sr crystals, which can potentially cause scaling, as well as Ca crystals deposited on the membrane surface were investigated. Mg(OH)₂ and CaSO₄ had significant impact on fouling and wetting. Even if CaCO₃ and SrSO₄ had no effects on fouling and wetting as single salts, CaCO₃ and CaSO₄ were dominant in synthetic seawater without Mg(OH)₂. However, the occurrence of Mg(OH)₂ scales became a cause for concern if Ca ion was removed from seawater for the prevention of fouling and wetting. Therefore, Mg as well as Ca should be removed for proper fouling and wetting control. NaOH/Na₂CO₃ softening was used for the removal of Ca and Mg ions. In addition, based on the inhibition effects of Mg ions on Ca scales, a new pretreatment method involving the injection of MgCl₂ to increase the Mg /Ca ratio was examined.

Original language	English
Article number	115677
Journal	Water Research
Volume	175
DOIs	https://doi.org/10.1016/j.watres.2020.115677
Publication status	Published - 2020 May 15

Keywords

Chemical softening
Membrane distillation
Mg addition
Retardation of wetting
Visualization system

ASJC Scopus subject areas

Ecological Modelling
Water Science and Technology
Waste Management and Disposal
Pollution

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title = "Retardation of wetting for membrane distillation by adjusting major components of seawater",

abstract = "Wetting by fouling is phenomenon specific to membrane distillation (MD) and are regarded as challenges to the seawater membrane distillation (SWMD) process. To understand fouling and wetting, the influence of Mg and Sr crystals, which can potentially cause scaling, as well as Ca crystals deposited on the membrane surface were investigated. Mg(OH)2 and CaSO4 had significant impact on fouling and wetting. Even if CaCO3 and SrSO4 had no effects on fouling and wetting as single salts, CaCO3 and CaSO4 were dominant in synthetic seawater without Mg(OH)2. However, the occurrence of Mg(OH)2 scales became a cause for concern if Ca ion was removed from seawater for the prevention of fouling and wetting. Therefore, Mg as well as Ca should be removed for proper fouling and wetting control. NaOH/Na2CO3 softening was used for the removal of Ca and Mg ions. In addition, based on the inhibition effects of Mg ions on Ca scales, a new pretreatment method involving the injection of MgCl2 to increase the Mg /Ca ratio was examined.",

keywords = "Chemical softening, Membrane distillation, Mg addition, Retardation of wetting, Visualization system",

author = "Kim, {Hye Won} and Taekgeun Yun and Seungkwan Hong and Seockheon Lee and Seongpil Jeong",

note = "Funding Information: This research was supported by Korea Environment Industry & Technology Institute (KEITI) through Plant Research Project funded by the Ministry of Environment of Korean Government ( 146841 ). This work also supported by Korea Institute of Science and Technology ( 2Z05970 , 2E30510 ), and by KU-KIST Graduate School Project . Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd",

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language = "English",

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T1 - Retardation of wetting for membrane distillation by adjusting major components of seawater

AU - Kim, Hye Won

AU - Yun, Taekgeun

AU - Hong, Seungkwan

AU - Lee, Seockheon

AU - Jeong, Seongpil

N1 - Funding Information: This research was supported by Korea Environment Industry & Technology Institute (KEITI) through Plant Research Project funded by the Ministry of Environment of Korean Government ( 146841 ). This work also supported by Korea Institute of Science and Technology ( 2Z05970 , 2E30510 ), and by KU-KIST Graduate School Project . Publisher Copyright: © 2020 Elsevier Ltd

PY - 2020/5/15

Y1 - 2020/5/15

N2 - Wetting by fouling is phenomenon specific to membrane distillation (MD) and are regarded as challenges to the seawater membrane distillation (SWMD) process. To understand fouling and wetting, the influence of Mg and Sr crystals, which can potentially cause scaling, as well as Ca crystals deposited on the membrane surface were investigated. Mg(OH)2 and CaSO4 had significant impact on fouling and wetting. Even if CaCO3 and SrSO4 had no effects on fouling and wetting as single salts, CaCO3 and CaSO4 were dominant in synthetic seawater without Mg(OH)2. However, the occurrence of Mg(OH)2 scales became a cause for concern if Ca ion was removed from seawater for the prevention of fouling and wetting. Therefore, Mg as well as Ca should be removed for proper fouling and wetting control. NaOH/Na2CO3 softening was used for the removal of Ca and Mg ions. In addition, based on the inhibition effects of Mg ions on Ca scales, a new pretreatment method involving the injection of MgCl2 to increase the Mg /Ca ratio was examined.

AB - Wetting by fouling is phenomenon specific to membrane distillation (MD) and are regarded as challenges to the seawater membrane distillation (SWMD) process. To understand fouling and wetting, the influence of Mg and Sr crystals, which can potentially cause scaling, as well as Ca crystals deposited on the membrane surface were investigated. Mg(OH)2 and CaSO4 had significant impact on fouling and wetting. Even if CaCO3 and SrSO4 had no effects on fouling and wetting as single salts, CaCO3 and CaSO4 were dominant in synthetic seawater without Mg(OH)2. However, the occurrence of Mg(OH)2 scales became a cause for concern if Ca ion was removed from seawater for the prevention of fouling and wetting. Therefore, Mg as well as Ca should be removed for proper fouling and wetting control. NaOH/Na2CO3 softening was used for the removal of Ca and Mg ions. In addition, based on the inhibition effects of Mg ions on Ca scales, a new pretreatment method involving the injection of MgCl2 to increase the Mg /Ca ratio was examined.

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KW - Visualization system

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Retardation of wetting for membrane distillation by adjusting major components of seawater

Abstract

Keywords

ASJC Scopus subject areas

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