Graphene as a rational interface for enhanced adsorption of microcystin-LR from water

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dc.citation.articleNumber131737en_US
dc.citation.journalTitleJournal of Hazardous Materialsen_US
dc.citation.volumeNumber458en_US
dc.contributor.authorRoberts, Jesse L.en_US
dc.contributor.authorZetterholm, Sarah Graceen_US
dc.contributor.authorGurtowski, Lukeen_US
dc.contributor.authorFernando, PU Ashvin I.en_US
dc.contributor.authorEvans, Angelaen_US
dc.contributor.authorPuhnaty, Justinen_US
dc.contributor.authorWyss, Kevin M.en_US
dc.contributor.authorTour, James M.en_US
dc.contributor.authorFernando, Briannaen_US
dc.contributor.authorJenness, Glenen_US
dc.contributor.authorThompson, Audieen_US
dc.contributor.authorGriggs, Chrisen_US
dc.contributor.orgRice Advanced Materials Instituteen_US
dc.contributor.orgWelch Institute for Advanced Materialsen_US
dc.contributor.orgSmalley-Curl Instituteen_US
dc.date.accessioned2023-08-01T17:29:37Zen_US
dc.date.available2023-08-01T17:29:37Zen_US
dc.date.issued2023en_US
dc.description.abstractCyanotoxins such as microcystin-LR (MC-LR) represent a global environmental threat to ecosystems and drinking water supplies. The study investigated the direct use of graphene as a rational interface for removal of MC-LR via interactions with the aromatic ring of the ADDA1 chain of MC-LR and the sp2 hybridized carbon network of graphene. Intra-particle diffusion model fit indicated the high mesoporosity of graphene provided significant enhancements to both adsorption capacities and kinetics when benchmarked against microporous granular activated carbon (GAC). Graphene showed superior MC-LR adsorption capacity of 75.4 mg/g (Freundlich model) compared to 0.982 mg/g (Langmuir model) for GAC. Sorption kinetic studies showed graphene adsorbs 99% of MC-LR in 30 min, compared to zero removal for GAC after 24 hr using the same MC-LR concentration. Density functional theory (DFT), calculations showed that postulated π-based interactions align well with the NMR-based experimental work used to probe primary interactions between graphene and MC-LR adduct. This study proved that π-interactions between the aromatic ring on MC-LR and graphene sp2 orbitals are a dominant interaction. With rapid kinetics and adsorption capacities much higher than GAC, it is anticipated that graphene will offer a novel molecular approach for removal of toxins and emerging contaminants with aromatic systems.en_US
dc.identifier.citationRoberts, Jesse L., Zetterholm, Sarah Grace, Gurtowski, Luke, et al.. "Graphene as a rational interface for enhanced adsorption of microcystin-LR from water." <i>Journal of Hazardous Materials,</i> 458, (2023) Elsevier: https://doi.org/10.1016/j.jhazmat.2023.131737.en_US
dc.identifier.digital1-s2-0-S0304389423010208-mainen_US
dc.identifier.doihttps://doi.org/10.1016/j.jhazmat.2023.131737en_US
dc.identifier.urihttps://hdl.handle.net/1911/115031en_US
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.rightsExcept where otherwise noted, this work is licensed under a Creative Commons Attribution (CC BY) license.  Permission to reuse, publish, or reproduce the work beyond the terms of the license or beyond the bounds of Fair Use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.titleGraphene as a rational interface for enhanced adsorption of microcystin-LR from wateren_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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