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Synthesis of quaternary ammonium-functionalized silica gel through grafting of dimethyl dodecyl [3-(trimethoxysilyl)propyl]ammonium chloride for nitrate removal in batch and column studies

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dc.contributor.authorKang, Jin-Kyu-
dc.contributor.authorLee, Seung-Chan-
dc.contributor.authorKim, Song-Bae-
dc.date.accessioned2022-06-24T07:15:51Z-
dc.date.available2022-06-24T07:15:51Z-
dc.date.created2020-03-25-
dc.date.issued2019-09-
dc.identifier.citationJournal of the Taiwan Institute of Chemical Engineers, Vol.102, pp.153-162-
dc.identifier.issn1876-1070-
dc.identifier.urihttps://hdl.handle.net/10371/184029-
dc.description.abstractIn this study, quaternary ammonium functionalized-silica gel was synthesized for nitrate removal using dimethyl dodecyl[3-(trimethoxysilyl)propyl] ammonium chloride (DMDAC) as a quaternary ammonium silane coupling agent, which was grafted to silica gel to obtain the DMDAC-silica gel. Batch experiments showed that the DMDAC-silica gel could effectively remove nitrate in the pH range of 4 to 10. Kinetic and equilibrium experiments showed that nitrate removal by the DMDAC-silica gel reached equilibrium in 60 min with a maximum nitrate removal capacity of 56.4 mg/g. Fixed-bed column experiments (bed depth = 10-30cm; inner diameter of column = 2.5 cm; flow rate = 0.06-0.18 L/h) in nitrate solution demonstrated the dynamic behaviors of nitrate removal by the DMDAC-silica gel under various experimental conditions of flow rate, bed depth, and influent nitrate concentration. The DMDAC-silica gels could be successfully used for nitrate removal and regenerated and reused with 10% NaCl solution in the column. In groundwater (nitrate =140 mg/L, chloride = 63 mg/L, sulfate = 440 mg/L, and bicarbonate = 20-300 mg/L), the nitrate BTCs appeared behind the sulfate BTCs with alpha(N)(S) values of 5.7-11.3, indicating that the DMDAC-silica gel could selectively remove nitrate over sulfate in dynamic flow conditions. (C) 2019 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.-
dc.language영어-
dc.publisherElsevier Science-
dc.titleSynthesis of quaternary ammonium-functionalized silica gel through grafting of dimethyl dodecyl [3-(trimethoxysilyl)propyl]ammonium chloride for nitrate removal in batch and column studies-
dc.typeArticle-
dc.identifier.doi10.1016/j.jtice.2019.05.019-
dc.citation.journaltitleJournal of the Taiwan Institute of Chemical Engineers-
dc.identifier.wosid000479020700017-
dc.identifier.scopusid2-s2.0-85066955596-
dc.citation.endpage162-
dc.citation.startpage153-
dc.citation.volume102-
dc.description.isOpenAccessN-
dc.contributor.affiliatedAuthorKim, Song-Bae-
dc.type.docTypeArticle-
dc.description.journalClass1-
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