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dc.contributor.authorGe, Qingchun
dc.contributor.authorAmy, Gary L.
dc.contributor.authorChung, Neal Tai-Shung
dc.date.accessioned2017-06-12T08:33:42Z
dc.date.available2017-06-12T08:33:42Z
dc.date.issued2017-06-11
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.
dc.identifier.issn0043-1354
dc.identifier.doi10.1016/j.watres.2017.06.025
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.
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).
dc.publisherElsevier BV
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S0043135417305018
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/
dc.subjectForward osmosis
dc.subjectDraw solute
dc.subjectHydroacid complex
dc.subjectWater treatment
dc.subjectOil-water separation
dc.titleForward osmosis for oily wastewater reclamation: Multi-charged oxalic acid complexes as draw solutes
dc.typeArticle
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.contributor.departmentEnvironmental Science and Engineering Program
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)
dc.identifier.journalWater Research
dc.eprint.versionPost-print
dc.contributor.institutionCollege of Environment and Resources, Fuzhou University, Fujian 350116, China
dc.contributor.institutionDepartment of Chemical & Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117576, Singapore
kaust.personAmy, Gary L.
kaust.personChung, Neal Tai-Shung
refterms.dateFOA2019-06-10T00:00:00Z
dc.date.published-online2017-06-11
dc.date.published-print2017-10


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