Osmotic's potential: An overview of draw solutes for forward osmosis

Daniel James Johnson, Wafa Ali Suwaileh, Abdul Wahab Mohammad, Nidal Hilal

Research output: Contribution to journalReview article

46 Citations (Scopus)

Abstract

Forward osmosis (FO) is a membrane separation process using a highly concentrated draw solution with high osmotic potential to draw water across a semi-permeable membrane from a feed source. This feed source may be seawater, wastewater or other natural or contaminated water sources. Unlike other membrane driven purification processes, the product is not clean water, but a diluted draw solution. As a result a second step is often needed to produce a pure water product. A major advantage of FO is that the low hydrodynamic pressure involved leads to lowered fouling of membranes and greater flux recovery after cleaning, as well as often providing a low energy process which can recover clean water from difficult or highly fouling sources. Selection of an appropriate and effective draw solution is essential for the practical operation of an FO process. This review will give an overview of the theoretical underpinnings of draw solution performance and a comprehensive summary of the current literature regarding the different types of draw solutions which have been investigated and their respective benefits and detriments.

Original languageEnglish
Pages (from-to)100-120
Number of pages21
JournalDesalination
Volume434
DOIs
Publication statusPublished - 15 May 2018

Fingerprint

Osmosis
osmosis
solute
Water
membrane
Membranes
Fouling
fouling
water
Seawater
Purification
purification
Cleaning
Wastewater
Hydrodynamics
hydrodynamics
Fluxes
seawater
wastewater
Recovery

Keywords

  • Desalination
  • Draw solution
  • Forward osmosis
  • Membrane separation
  • Water treatment

ASJC Scopus subject areas

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

Cite this

Osmotic's potential : An overview of draw solutes for forward osmosis. / Johnson, Daniel James; Suwaileh, Wafa Ali; Mohammad, Abdul Wahab; Hilal, Nidal.

In: Desalination, Vol. 434, 15.05.2018, p. 100-120.

Research output: Contribution to journalReview article

Johnson, Daniel James ; Suwaileh, Wafa Ali ; Mohammad, Abdul Wahab ; Hilal, Nidal. / Osmotic's potential : An overview of draw solutes for forward osmosis. In: Desalination. 2018 ; Vol. 434. pp. 100-120.
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