skip to main content

Title: Exceptional ion rejection ability of directional solvent for non-membrane desalination

The recently demonstrated directional solvent extraction (DSE) is promising for very low temperature, membrane-free water desalination. In this paper, we combine atomistic simulations and experimental validation to demonstrate that the currently used directional solvent, decanoic acid, can reject all major salt ions in seawater, with very high rejection rates. The salinities of the DSE recovered water show that ion rejection rates are ∼98%–99%—similar to those of the best reverse osmosis membranes. Our test also shows that the DSE process can desalt seawater to produce fresh water that meets drinking water standards.
Authors:
 [1] ;  [2] ; ;  [1] ;  [1] ;  [2]
  1. Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, Indiana 46556 (United States)
  2. (United States)
Publication Date:
OSTI Identifier:
22275822
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 2; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; DECANOIC ACID; DESALINATION; DRINKING WATER; FRESH WATER; IONS; MEMBRANES; OSMOSIS; SALINITY; SEAWATER; SOLVENT EXTRACTION