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http://dx.doi.org/10.14579/MEMBRANE_JOURNAL.2014.24.5.400

Evaluating the Performance of Draw Solutions in Forward Osmosis Desalination Using Fertilizer as Draw Solution  

Jeong, Namjo (Jeju Global Research Center, Korea Institute of Energy Research)
Kim, Seung-Geon (Dept. of Chemical and Biological Engineering, Jeju National University)
Lee, Ho-Won (Dept. of Chemical and Biological Engineering, Jeju National University)
Publication Information
Membrane Journal / v.24, no.5, 2014 , pp. 400-408 More about this Journal
Abstract
This study is to evaluate the performance of draw solutions in forward osmosis desalination using fertilizer as draw solution. Considering osmotic pressure, solubility, and pH, $NH_4NO_3$, $NH_4H_2PO_4$, $(NH_4)_2HPO_4$, KCl, $KNO_3$, and $KHCO_3$ were screened from a comprehensive lists of fertilizer. Their performance were evaluated in terms of pure water permeate flux, reverse solute flux, and specific reverse solute flux for nitrogen and phosphorus. KCl showed the highest pure water permeate flux among the selected fertilizers while $(NH_4)_2HPO_4$ draw solution had the lowest flux. $NH_4H_2PO_4$ showed the lowest reverse solute flux and specific reverse solute flux for nitrogen followed by $(NH_4)_2HPO_4$, $KNO_3$, and $NH_4NO_3$. Although the pure water permeate flux of $NH_4H_2PO_4$ is lower than the other draw solutions, because it contains both nitrogen and phosphorus, and have the lowest reverse solute flux and specific reverse solute flux, it is a promising candidate as draw solution for forward osmosis desalination.
Keywords
forward osmosis; fertilizer; desalination; pure water permeate flux; reverse solute flux;
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Times Cited By KSCI : 4  (Citation Analysis)
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