Enhanced heavy metal removal from an aqueous environment using an eco-friendly and sustainable adsorbent

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dc.contributor.authorZhang, Wanqien
dc.contributor.authorAn, Yuhongen
dc.contributor.authorLi, Shujingen
dc.contributor.authorLiu, Zhechenen
dc.contributor.authorChen, Zhangjingen
dc.contributor.authorRen, Yukunen
dc.contributor.authorWang, Sunguoen
dc.contributor.authorZhang, Xiaotaoen
dc.contributor.authorWang, Ximingen
dc.contributor.departmentSustainable Biomaterialsen
dc.date.accessioned2021-02-02T20:33:21Zen
dc.date.available2021-02-02T20:33:21Zen
dc.date.issued2020-10-05en
dc.description.abstractThiol-lignocellulose sodium bentonite (TLSB) nanocomposites can effectively remove heavy metals from aqueous solutions. TLSB was formed by using-SH group-modified lignocellulose as a raw material, which was intercalated into the interlayers of hierarchical sodium bentonite. Characterization of TLSB was then performed with BET, FTIR, XRD, TGA, PZC, SEM, and TEM analyses. The results indicated that thiol-lignocellulose molecules may have different influences on the physicochemical properties of sodium bentonite, and an intercalated-exfoliated structure was successfully formed. The TLSB nanocomposite was subsequently investigated to validate its adsorption and desorption capacities for the zinc subgroup ions Zn(II), Cd(II) and Hg(II). The optimum adsorption parameters were determined based on the TLSB nanocomposite dosage, concentration of zinc subgroup ions, solution pH, adsorption temperature and adsorption time. The results revealed that the maximum adsorption capacity onto TLSB was 357.29 mg/g for Zn(II), 458.32 mg/g for Cd(II) and 208.12 mg/g for Hg(II). The adsorption kinetics were explained by the pseudo-second-order model, and the adsorption isotherm conformed to the Langmuir model, implying that the dominant chemical adsorption mechanism on TLSB is monolayer coverage. Thermodynamic studies suggested that the adsorption is spontaneous and endothermic. Desorption and regeneration experiments revealed that TLSB could be desorbed with HCl to recover Zn(II) and Cd(II) and with-HNO3 to recover Hg(II) after several consecutive adsorption/desorption cycles. The adsorption mechanism was investigated through FTIR, EDX and SEM, which demonstrated that the introduction of thiol groups improved the adsorption capacity. All of these results suggested that TLSB is an eco-friendly and sustainable adsorbent for the extraction of Zn(II), Cd(II) and Hg(II) ions in aqueous media.en
dc.description.notesThis work was financially supported by the High-Level Talent Research Initiation Project of Inner Mongolia Agricultural University (NDYB2018-59), Science and Technology Achievements Transformation Project of Inner Mongolia Autonomous Region in China (CGZH2018136), and Grass Talents Engineering Youth Innovation and Entrepreneurship of Inner Mongolia Autonomous Region in China (Q2017053), the National Natural Science Foundation of China (21467021).en
dc.description.sponsorshipHigh-Level Talent Research Initiation Project of Inner Mongolia Agricultural University [NDYB2018-59]; Science and Technology Achievements Transformation Project of Inner Mongolia Autonomous Region in China [CGZH2018136]; Grass Talents Engineering Youth Innovation and Entrepreneurship of Inner Mongolia Autonomous Region in China [Q2017053]; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [21467021]en
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1038/s41598-020-73570-7en
dc.identifier.issn2045-2322en
dc.identifier.issue1en
dc.identifier.other16453en
dc.identifier.pmid33020581en
dc.identifier.urihttp://hdl.handle.net/10919/102204en
dc.identifier.volume10en
dc.language.isoenen
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.titleEnhanced heavy metal removal from an aqueous environment using an eco-friendly and sustainable adsorbenten
dc.title.serialScientific Reportsen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.dcmitypeStillImageen

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