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EDTA : a synthetic draw solute for forward osmosis

(2014) WATER SCIENCE AND TECHNOLOGY. 70(10). p.1677-1682
Author
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Abstract
The draw solution is the driving force of the forward osmosis (FO) process; however, the solute loss of the draw solute to the feed side is a general, financial limitation for most applications. The anthropogenic amino acid ethylenediaminetetraacetic acid (EDTA) was investigated as a draw solution for FO. At concentrations of approximately 1.0 osmol/kg, EDTA demonstrated comparable water fluxes (J(v) = 5.29 L/m(2) h) to the commonly used salt, NaCl (J(v) = 4.86 L/m(2) h), and both produced better water fluxes than glucose (J(v) = 3.46 L/m(2) h). EDTA showed the lowest solute loss with J(s) (reverse solute loss or solute leakage) = 0.54 g/m(2) h. The molecular weight, degree of ionisation and charge of EDTA played a major role in this efficiency and EDTA was therefore well rejected by the membrane, showing a low J(s)/J(v) ratio of 0.10 g/L. Owing to the low solute loss of EDTA and its resistance to biodegradation, this compound has the potential to be used as a draw solute for FO during long periods without requiring much replenishment.
Keywords
draw solution, EDTA, forward osmosis, reverse solute leakage, WASTE-WATER, PROCESS PERFORMANCE, PERMEATION, MEMBRANES, FLUX

Citation

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Chicago
Lutchmiah, Kerusha, Jan W Post, Luuk C Rietveld, and Emile Cornelissen. 2014. “EDTA : a Synthetic Draw Solute for Forward Osmosis.” Water Science and Technology 70 (10): 1677–1682.
APA
Lutchmiah, K., Post, J. W., Rietveld, L. C., & Cornelissen, E. (2014). EDTA : a synthetic draw solute for forward osmosis. WATER SCIENCE AND TECHNOLOGY, 70(10), 1677–1682.
Vancouver
1.
Lutchmiah K, Post JW, Rietveld LC, Cornelissen E. EDTA : a synthetic draw solute for forward osmosis. WATER SCIENCE AND TECHNOLOGY. 2014;70(10):1677–82.
MLA
Lutchmiah, Kerusha, Jan W Post, Luuk C Rietveld, et al. “EDTA : a Synthetic Draw Solute for Forward Osmosis.” WATER SCIENCE AND TECHNOLOGY 70.10 (2014): 1677–1682. Print.
@article{8557140,
  abstract     = {The draw solution is the driving force of the forward osmosis (FO) process; however, the solute loss of the draw solute to the feed side is a general, financial limitation for most applications. The anthropogenic amino acid ethylenediaminetetraacetic acid (EDTA) was investigated as a draw solution for FO. At concentrations of approximately 1.0 osmol/kg, EDTA demonstrated comparable water fluxes (J(v) = 5.29 L/m(2) h) to the commonly used salt, NaCl (J(v) = 4.86 L/m(2) h), and both produced better water fluxes than glucose (J(v) = 3.46 L/m(2) h). EDTA showed the lowest solute loss with J(s) (reverse solute loss or solute leakage) = 0.54 g/m(2) h. The molecular weight, degree of ionisation and charge of EDTA played a major role in this efficiency and EDTA was therefore well rejected by the membrane, showing a low J(s)/J(v) ratio of 0.10 g/L. Owing to the low solute loss of EDTA and its resistance to biodegradation, this compound has the potential to be used as a draw solute for FO during long periods without requiring much replenishment.},
  author       = {Lutchmiah, Kerusha and Post, Jan W and Rietveld, Luuk C and Cornelissen, Emile},
  issn         = {0273-1223},
  journal      = {WATER SCIENCE AND TECHNOLOGY},
  keyword      = {draw solution,EDTA,forward osmosis,reverse solute leakage,WASTE-WATER,PROCESS PERFORMANCE,PERMEATION,MEMBRANES,FLUX},
  language     = {eng},
  number       = {10},
  pages        = {1677--1682},
  title        = {EDTA : a synthetic draw solute for forward osmosis},
  url          = {http://dx.doi.org/10.2166/wst.2014.424},
  volume       = {70},
  year         = {2014},
}

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