Organic fouling and reverse solute selectivity in forward osmosis

Role of working temperature and inorganic draw solutions

Jiyong Heo, Kyoung Hoon Chu, Namguk Her, Jongkwon Im, Yong Gyun Park, Jaeweon Cho, Sarper Sarp, Am Jang, Min Jang, Yeomin Yoon

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

The water flux of several draw solutions (DSs, solutes: KCl, NaCl, CaCl<inf>2</inf>, Na<inf>2</inf>SO<inf>4</inf>) and fouling propensity of two different organic foulants (humic acid and alginate) were systematically investigated using forward osmosis (FO) and unpressurized pressure-retarded osmosis. In addition, reverse solute selectivity was evaluated to characterize the water and salt transport mechanisms at different temperatures and in the presence of four different inorganic DS compounds. The influence of solution viscosity has significant implications in FO applications, because the water molecules easily penetrated and diffused throughout the FO membrane active layer (AL) and supporting layer (SL) with increasing temperatures, which is mainly correlated with the lower water viscosities with increasing temperatures. The results indicated that the water flux on average significantly increased from 9.5 to 13.7 and 24.9 LMH when the operating temperature was increased from 5 to 20 and 45°C, which corresponded to a 44 and 262% increase in the water flux, compared to the FO mode at 5°C. However, the water flux and viscosity exhibited generally constant trends with respect to the elevating temperature. In addition, elevating temperature increased the reverse solute flux selectivity (RSFS), not only by decreasing the internal concentration polarization (the AL and SL) and the wettability within the effective porosity of the SL, but also via the improvement of water molecule diffusion kinetics rather than solute diffusion. In addition, the RSFS was inversely related to the solute permeability of the different DSs and followed the order Na<inf>2</inf>SO<inf>4</inf> >CaCl<inf>2</inf> >NaCl>KCl. These results have significant implications for the prediction of water flux behavior and the selection of DSs at different temperatures in osmotically driven FO processes.

Original languageEnglish
JournalDesalination
DOIs
Publication statusAccepted/In press - 31 Mar 2015

Fingerprint

Osmosis
Fouling
osmosis
fouling
solute
Water
Fluxes
temperature
water
Temperature
viscosity
active layer
Viscosity
Humic Substances
Inorganic compounds
Osmosis membranes
inorganic compound
Molecules
alginate
Alginate

Keywords

  • Forward osmosis
  • Fouling
  • Inorganic draw solutions
  • Reverse solute flux selectivity
  • Temperature
  • Unpressurized pressure-retarded osmosis

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Mechanical Engineering
  • Chemistry(all)
  • Materials Science(all)
  • Water Science and Technology

Cite this

Organic fouling and reverse solute selectivity in forward osmosis : Role of working temperature and inorganic draw solutions. / Heo, Jiyong; Chu, Kyoung Hoon; Her, Namguk; Im, Jongkwon; Park, Yong Gyun; Cho, Jaeweon; Sarp, Sarper; Jang, Am; Jang, Min; Yoon, Yeomin.

In: Desalination, 31.03.2015.

Research output: Contribution to journalArticle

Heo, Jiyong ; Chu, Kyoung Hoon ; Her, Namguk ; Im, Jongkwon ; Park, Yong Gyun ; Cho, Jaeweon ; Sarp, Sarper ; Jang, Am ; Jang, Min ; Yoon, Yeomin. / Organic fouling and reverse solute selectivity in forward osmosis : Role of working temperature and inorganic draw solutions. In: Desalination. 2015.
@article{69f101b921724fdca6b795cdcaca0c54,
title = "Organic fouling and reverse solute selectivity in forward osmosis: Role of working temperature and inorganic draw solutions",
abstract = "The water flux of several draw solutions (DSs, solutes: KCl, NaCl, CaCl2, Na2SO4) and fouling propensity of two different organic foulants (humic acid and alginate) were systematically investigated using forward osmosis (FO) and unpressurized pressure-retarded osmosis. In addition, reverse solute selectivity was evaluated to characterize the water and salt transport mechanisms at different temperatures and in the presence of four different inorganic DS compounds. The influence of solution viscosity has significant implications in FO applications, because the water molecules easily penetrated and diffused throughout the FO membrane active layer (AL) and supporting layer (SL) with increasing temperatures, which is mainly correlated with the lower water viscosities with increasing temperatures. The results indicated that the water flux on average significantly increased from 9.5 to 13.7 and 24.9 LMH when the operating temperature was increased from 5 to 20 and 45°C, which corresponded to a 44 and 262{\%} increase in the water flux, compared to the FO mode at 5°C. However, the water flux and viscosity exhibited generally constant trends with respect to the elevating temperature. In addition, elevating temperature increased the reverse solute flux selectivity (RSFS), not only by decreasing the internal concentration polarization (the AL and SL) and the wettability within the effective porosity of the SL, but also via the improvement of water molecule diffusion kinetics rather than solute diffusion. In addition, the RSFS was inversely related to the solute permeability of the different DSs and followed the order Na2SO4 >CaCl2 >NaCl>KCl. These results have significant implications for the prediction of water flux behavior and the selection of DSs at different temperatures in osmotically driven FO processes.",
keywords = "Forward osmosis, Fouling, Inorganic draw solutions, Reverse solute flux selectivity, Temperature, Unpressurized pressure-retarded osmosis",
author = "Jiyong Heo and Chu, {Kyoung Hoon} and Namguk Her and Jongkwon Im and Park, {Yong Gyun} and Jaeweon Cho and Sarper Sarp and Am Jang and Min Jang and Yeomin Yoon",
year = "2015",
month = "3",
day = "31",
doi = "10.1016/j.desal.2015.06.012",
language = "English",
journal = "Desalination",
issn = "0011-9164",
publisher = "Elsevier",

}

TY - JOUR

T1 - Organic fouling and reverse solute selectivity in forward osmosis

T2 - Role of working temperature and inorganic draw solutions

AU - Heo, Jiyong

AU - Chu, Kyoung Hoon

AU - Her, Namguk

AU - Im, Jongkwon

AU - Park, Yong Gyun

AU - Cho, Jaeweon

AU - Sarp, Sarper

AU - Jang, Am

AU - Jang, Min

AU - Yoon, Yeomin

PY - 2015/3/31

Y1 - 2015/3/31

N2 - The water flux of several draw solutions (DSs, solutes: KCl, NaCl, CaCl2, Na2SO4) and fouling propensity of two different organic foulants (humic acid and alginate) were systematically investigated using forward osmosis (FO) and unpressurized pressure-retarded osmosis. In addition, reverse solute selectivity was evaluated to characterize the water and salt transport mechanisms at different temperatures and in the presence of four different inorganic DS compounds. The influence of solution viscosity has significant implications in FO applications, because the water molecules easily penetrated and diffused throughout the FO membrane active layer (AL) and supporting layer (SL) with increasing temperatures, which is mainly correlated with the lower water viscosities with increasing temperatures. The results indicated that the water flux on average significantly increased from 9.5 to 13.7 and 24.9 LMH when the operating temperature was increased from 5 to 20 and 45°C, which corresponded to a 44 and 262% increase in the water flux, compared to the FO mode at 5°C. However, the water flux and viscosity exhibited generally constant trends with respect to the elevating temperature. In addition, elevating temperature increased the reverse solute flux selectivity (RSFS), not only by decreasing the internal concentration polarization (the AL and SL) and the wettability within the effective porosity of the SL, but also via the improvement of water molecule diffusion kinetics rather than solute diffusion. In addition, the RSFS was inversely related to the solute permeability of the different DSs and followed the order Na2SO4 >CaCl2 >NaCl>KCl. These results have significant implications for the prediction of water flux behavior and the selection of DSs at different temperatures in osmotically driven FO processes.

AB - The water flux of several draw solutions (DSs, solutes: KCl, NaCl, CaCl2, Na2SO4) and fouling propensity of two different organic foulants (humic acid and alginate) were systematically investigated using forward osmosis (FO) and unpressurized pressure-retarded osmosis. In addition, reverse solute selectivity was evaluated to characterize the water and salt transport mechanisms at different temperatures and in the presence of four different inorganic DS compounds. The influence of solution viscosity has significant implications in FO applications, because the water molecules easily penetrated and diffused throughout the FO membrane active layer (AL) and supporting layer (SL) with increasing temperatures, which is mainly correlated with the lower water viscosities with increasing temperatures. The results indicated that the water flux on average significantly increased from 9.5 to 13.7 and 24.9 LMH when the operating temperature was increased from 5 to 20 and 45°C, which corresponded to a 44 and 262% increase in the water flux, compared to the FO mode at 5°C. However, the water flux and viscosity exhibited generally constant trends with respect to the elevating temperature. In addition, elevating temperature increased the reverse solute flux selectivity (RSFS), not only by decreasing the internal concentration polarization (the AL and SL) and the wettability within the effective porosity of the SL, but also via the improvement of water molecule diffusion kinetics rather than solute diffusion. In addition, the RSFS was inversely related to the solute permeability of the different DSs and followed the order Na2SO4 >CaCl2 >NaCl>KCl. These results have significant implications for the prediction of water flux behavior and the selection of DSs at different temperatures in osmotically driven FO processes.

KW - Forward osmosis

KW - Fouling

KW - Inorganic draw solutions

KW - Reverse solute flux selectivity

KW - Temperature

KW - Unpressurized pressure-retarded osmosis

UR - http://www.scopus.com/inward/record.url?scp=84933054779&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84933054779&partnerID=8YFLogxK

U2 - 10.1016/j.desal.2015.06.012

DO - 10.1016/j.desal.2015.06.012

M3 - Article

JO - Desalination

JF - Desalination

SN - 0011-9164

ER -