Forward osmosis for oily wastewater reclamation: Multi-charged oxalic acid complexes as draw solutes

Handle URI:
http://hdl.handle.net/10754/624905
Title:
Forward osmosis for oily wastewater reclamation: Multi-charged oxalic acid complexes as draw solutes
Authors:
Ge, Qingchun; Amy, Gary Lee; Chung, Neal Tai-Shung ( 0000-0003-3704-8609 )
Abstract:
Forward osmosis (FO) has demonstrated its merits in hybrid FO seawater desalination. However, FO may have a potential for other applications if suitable draw solutes are available. In this study, a series of novel draw solutes based on oxalic acid (OA)-transitional metal complexes are presented. Influential factors of FO performance have been systematically investigated by varying the transitional metals, cations of the complex draw solutes as well as the experimental conditions. Compared to NaCl and other recently synthesized draw solutes, the OA complexes show superior FO performance in terms of high water fluxes up to 27.5 and 89.1 LMH under the respective FO and PRO (pressure retarded osmosis) modes, both with negligible reverse solute fluxes. The features of octahedral geometry, abundant hydrophilic groups and ionic species are crucial for the OA complexes as appropriate draw solutes with satisfactory FO performance. Among the synthesized OA complexes, the ammonium salt of chromic complex (NH4-Cr-OA) outperforms others due to the presence of more ionic species in its complex system. NH4-Cr-OA also performs better than the typical NaCl draw solute in FO oily wastewater treatment with higher water recovery and negligible reverse fluxes. Dilute solutions of OA complexes have been reconcentrated through membrane distillation (MD) and reused to new round of FO processes. The OA complexes have demonstrated their suitability and superiority as a novel class of draw solutes for the FO process in this study.
KAUST Department:
Water Desalination and Reuse Research Center (WDRC)
Citation:
Ge Q, Amy GL, Chung T-S (2017) Forward osmosis for oily wastewater reclamation: Multi-charged oxalic acid complexes as draw solutes. Water Research. Available: http://dx.doi.org/10.1016/j.watres.2017.06.025.
Publisher:
Elsevier BV
Journal:
Water Research
Issue Date:
11-Jun-2017
DOI:
10.1016/j.watres.2017.06.025
Type:
Article
ISSN:
0043-1354
Sponsors:
This research is supported by both the National Research Foundation- Prime Minister's office, Republic of Singapore under its Competitive Research Program entitled “Advanced FO Membranes and Membrane Systems for Wastewater Treatment, Water Reuse and Seawater Desalination” (Grant numbers: R-279-000-336-281 & R-279-000-339-281), and the financial supports from the National Natural Science Foundation of China (grant number: 21677035), the Natural Science Foundation of Fujian Province (grant number: 2016J01056) and Fuzhou University (grant number: XRC-1259).
Additional Links:
http://www.sciencedirect.com/science/article/pii/S0043135417305018
Appears in Collections:
Articles; Water Desalination and Reuse Research Center (WDRC)

Full metadata record

DC FieldValue Language
dc.contributor.authorGe, Qingchunen
dc.contributor.authorAmy, Gary Leeen
dc.contributor.authorChung, Neal Tai-Shungen
dc.date.accessioned2017-06-12T08:33:42Z-
dc.date.available2017-06-12T08:33:42Z-
dc.date.issued2017-06-11en
dc.identifier.citationGe Q, Amy GL, Chung T-S (2017) Forward osmosis for oily wastewater reclamation: Multi-charged oxalic acid complexes as draw solutes. Water Research. Available: http://dx.doi.org/10.1016/j.watres.2017.06.025.en
dc.identifier.issn0043-1354en
dc.identifier.doi10.1016/j.watres.2017.06.025en
dc.identifier.urihttp://hdl.handle.net/10754/624905-
dc.description.abstractForward osmosis (FO) has demonstrated its merits in hybrid FO seawater desalination. However, FO may have a potential for other applications if suitable draw solutes are available. In this study, a series of novel draw solutes based on oxalic acid (OA)-transitional metal complexes are presented. Influential factors of FO performance have been systematically investigated by varying the transitional metals, cations of the complex draw solutes as well as the experimental conditions. Compared to NaCl and other recently synthesized draw solutes, the OA complexes show superior FO performance in terms of high water fluxes up to 27.5 and 89.1 LMH under the respective FO and PRO (pressure retarded osmosis) modes, both with negligible reverse solute fluxes. The features of octahedral geometry, abundant hydrophilic groups and ionic species are crucial for the OA complexes as appropriate draw solutes with satisfactory FO performance. Among the synthesized OA complexes, the ammonium salt of chromic complex (NH4-Cr-OA) outperforms others due to the presence of more ionic species in its complex system. NH4-Cr-OA also performs better than the typical NaCl draw solute in FO oily wastewater treatment with higher water recovery and negligible reverse fluxes. Dilute solutions of OA complexes have been reconcentrated through membrane distillation (MD) and reused to new round of FO processes. The OA complexes have demonstrated their suitability and superiority as a novel class of draw solutes for the FO process in this study.en
dc.description.sponsorshipThis research is supported by both the National Research Foundation- Prime Minister's office, Republic of Singapore under its Competitive Research Program entitled “Advanced FO Membranes and Membrane Systems for Wastewater Treatment, Water Reuse and Seawater Desalination” (Grant numbers: R-279-000-336-281 & R-279-000-339-281), and the financial supports from the National Natural Science Foundation of China (grant number: 21677035), the Natural Science Foundation of Fujian Province (grant number: 2016J01056) and Fuzhou University (grant number: XRC-1259).en
dc.publisherElsevier BVen
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S0043135417305018en
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Water Research. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Water Research, 10 June 2017. DOI: 10.1016/j.watres.2017.06.025. © 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectForward osmosisen
dc.subjectDraw soluteen
dc.subjectHydroacid complexen
dc.subjectWater treatmenten
dc.subjectOil-water separationen
dc.titleForward osmosis for oily wastewater reclamation: Multi-charged oxalic acid complexes as draw solutesen
dc.typeArticleen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.identifier.journalWater Researchen
dc.eprint.versionPost-printen
dc.contributor.institutionCollege of Environment and Resources, Fuzhou University, Fujian 350116, Chinaen
dc.contributor.institutionDepartment of Chemical & Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117576, Singaporeen
kaust.authorAmy, Gary Leeen
kaust.authorChung, Neal Tai-Shungen
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