Exploration of polyepoxysuccinic acid as a novel draw solution in the forward osmosis process

Wang, C; Gao, B; Zhao, P; Li, R; Yue, Q; Shon, HK

Exploration of polyepoxysuccinic acid as a novel draw solution in the forward osmosis process

Wang, C Gao, B

Zhao, P Li, R Yue, Q Shon, HK

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Publication Type:: Journal Article
Citation:: RSC Advances, 2017, 7 (49), pp. 30687 - 30698
Issue Date:: 2017-01-01

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Field	Value	Language
dc.contributor.author	Wang, C	en_US
dc.contributor.author	Gao, B https://orcid.org/0000-0002-8885-9594	en_US
dc.contributor.author	Zhao, P	en_US
dc.contributor.author	Li, R	en_US
dc.contributor.author	Yue, Q	en_US
dc.contributor.author	Shon, HK https://orcid.org/0000-0002-3777-7169	en_US
dc.date.issued	2017-01-01	en_US
dc.identifier.citation	RSC Advances, 2017, 7 (49), pp. 30687 - 30698	en_US
dc.identifier.uri	http://hdl.handle.net/10453/123708
dc.description.abstract	© 2017 The Royal Society of Chemistry. Polyepoxysuccinic acid (PESA) is a green corrosion scale inhibitor. When PESA is used for wastewater desalination in the forward osmosis (FO) process, the diluted PESA solution could be used for cooling systems. In our investigation, the effects of membrane orientation, temperature and flow rate on FO performance are studied using PESA as a draw solute. The results show that the effect of temperature on water flux is obvious, but the water flux increase is higher from 25 °C to 35 °C than that from 35 °C to 45 °C. Compared to the FO mode, the water flux increases faster in the pressure-retarded osmosis mode (PRO mode) at high flow rate due to the reduction of concentrative internal concentration polarization (CICP). Compared with polyaspartic acid (PASP) and NaCl, the water flux of PESA is the lowest under the same conditions. However, PESA has the lowest specific reverse solute flux (Js/Jw) at both membrane orientations. For example in the FO mode this value is 0.46 g L-1, whereas that of NaCl and PASP is 1.12 and 0.74 g L-1, respectively. This means that PESA has lower loss to the feed side than NaCl and PASP in the FO process, which greatly reduces the replenishment cost of the draw solute. The use of PESA as the draw solute in the FO process to treat dyeing water has the advantages of stable water flux (within 20 min), high dye rejection (nearly 1) and reversible membrane fouling (restored to 97%). The nanofiltration (NF) process indicates the good performance of PESA recovery with a high specific water flux (0.94 LMH per bar) and rejection rate (97.8%). Thus, the overall performance of PESA demonstrates that it is a promising draw solute.	en_US
dc.relation.ispartof	RSC Advances	en_US
dc.relation.isbasedon	10.1039/c7ra04036a	en_US
dc.title	Exploration of polyepoxysuccinic acid as a novel draw solution in the forward osmosis process	en_US
dc.type	Journal Article
utslib.citation.volume	49	en_US
utslib.citation.volume	7	en_US
utslib.for	0904 Chemical Engineering	en_US
utslib.for	03 Chemical Sciences	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	open_access
pubs.issue	49	en_US
pubs.publication-status	Published	en_US
pubs.volume	7	en_US

Abstract:

© 2017 The Royal Society of Chemistry. Polyepoxysuccinic acid (PESA) is a green corrosion scale inhibitor. When PESA is used for wastewater desalination in the forward osmosis (FO) process, the diluted PESA solution could be used for cooling systems. In our investigation, the effects of membrane orientation, temperature and flow rate on FO performance are studied using PESA as a draw solute. The results show that the effect of temperature on water flux is obvious, but the water flux increase is higher from 25 °C to 35 °C than that from 35 °C to 45 °C. Compared to the FO mode, the water flux increases faster in the pressure-retarded osmosis mode (PRO mode) at high flow rate due to the reduction of concentrative internal concentration polarization (CICP). Compared with polyaspartic acid (PASP) and NaCl, the water flux of PESA is the lowest under the same conditions. However, PESA has the lowest specific reverse solute flux (Js/Jw) at both membrane orientations. For example in the FO mode this value is 0.46 g L-1, whereas that of NaCl and PASP is 1.12 and 0.74 g L-1, respectively. This means that PESA has lower loss to the feed side than NaCl and PASP in the FO process, which greatly reduces the replenishment cost of the draw solute. The use of PESA as the draw solute in the FO process to treat dyeing water has the advantages of stable water flux (within 20 min), high dye rejection (nearly 1) and reversible membrane fouling (restored to 97%). The nanofiltration (NF) process indicates the good performance of PESA recovery with a high specific water flux (0.94 LMH per bar) and rejection rate (97.8%). Thus, the overall performance of PESA demonstrates that it is a promising draw solute.

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