Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/169327
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dc.contributor.authorLim, Josh HuaiXunen_US
dc.contributor.authorGoh, Kunlien_US
dc.contributor.authorNg, Daniel Yee Fanen_US
dc.contributor.authorChew, Jia Weien_US
dc.contributor.authorWang, Rongen_US
dc.date.accessioned2023-07-12T08:52:38Z-
dc.date.available2023-07-12T08:52:38Z-
dc.date.issued2023-
dc.identifier.citationLim, J. H., Goh, K., Ng, D. Y. F., Chew, J. W. & Wang, R. (2023). Layer-by-layer hierarchically structured nanofibrous membrane scaffolds incorporating metal-organic framework and carbon nanotube adsorbents for high-performance versatile organic solvent recovery. Journal of Cleaner Production, 404, 136925-. https://dx.doi.org/10.1016/j.jclepro.2023.136925en_US
dc.identifier.issn0959-6526en_US
dc.identifier.urihttps://hdl.handle.net/10356/169327-
dc.description.abstractConventional organic solvent recovery is energy intensive and challenged by large footprint and complex operation and maintenance. To enable a more circular and sustainable pharmaceutical production, we amalgamate adsorption and membrane processes to address current Achilles heels in organic solvent recovery. In this work, we have successfully designed a polyacrylonitrile (PAN) electrospun membrane as scaffold to incorporate nanomaterial adsorbents in a layer-by-layer hierarchical structure. The porous nanofibrous morphology and layer-by-layer design, which deconstructs the adsorbent layers, help reduce the transport resistance of the isopropyl alcohol (IPA), leading to higher processing capacity at lower applied pressure, while maintaining the removal rates. To bring about versatility for different contaminants, we incorporated two different nanomaterials, namely positively charged metal-organic frameworks (MOFs), particularly MIL-101(Cr), and negatively charged functionalized multi-walled carbon nanotubes (MWCNTs) as powdered adsorbents, for the extraction of anionic and cationic dyes, respectively. Our results show that the MOF-based membrane scaffold can achieve 99% and 95% rose Bengal and methyl orange removal rates in IPA, respectively, while operating at a low operating pressure of 0.04 bar and delivering a processing capacity of 60 L m−2 h−1 of IPA, with good regeneration and recyclability of up to three cycles of removal process. On the other hand, the MWCNT-based membrane scaffold displays up to 90% methylene blue dye in IPA at 0.07 bar pressure and delivering a 40 L m−2 h−1 of IPA processing capacity in a single-cycle removal process. The promising recovery performance and facile tailoring of adsorbents to target contaminants of different charges render our adsorptive membrane scaffold process less energy intensive and highly versatile to meet various needs for solvent recovery in the pharmaceutical industry.en_US
dc.description.sponsorshipNational Research Foundation (NRF)en_US
dc.description.sponsorshipPublic Utilities Board (PUB)en_US
dc.language.isoenen_US
dc.relationCWR-2101-0010en_US
dc.relation.ispartofJournal of Cleaner Productionen_US
dc.rights© 2023 Elsevier Ltd. All rights reserved. This paper was published in Journal of Cleaner Production and is made available with permission of Elsevier Ltd.en_US
dc.subjectEngineering::Civil engineeringen_US
dc.titleLayer-by-layer hierarchically structured nanofibrous membrane scaffolds incorporating metal-organic framework and carbon nanotube adsorbents for high-performance versatile organic solvent recoveryen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Civil and Environmental Engineeringen_US
dc.contributor.schoolInterdisciplinary Graduate School (IGS)en_US
dc.contributor.schoolSchool of Chemical and Biomedical Engineeringen_US
dc.contributor.researchNanyang Environment and Water Research Instituteen_US
dc.contributor.researchSingapore Membrane Technology Centreen_US
dc.identifier.doi10.1016/j.jclepro.2023.136925-
dc.description.versionSubmitted/Accepted versionen_US
dc.identifier.scopus2-s2.0-85151288982-
dc.identifier.volume404en_US
dc.identifier.spage136925en_US
dc.subject.keywordsAdsorptionen_US
dc.subject.keywordsOrganic Solvent Recoveryen_US
dc.description.acknowledgementThis research is supported by the National Research Foundation, Singapore, and implemented by the Public Utilities Board (PUB), Singapore’s National Water Agency, under its Competitive Funding for Water Research Funding Initiative (Grant Award CWR-2101-0010).en_US
item.grantfulltextembargo_20250617-
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