Biosorption of Pb(II) ions from aqueous solution using alginates extracted from Djiboutian seaweeds and deposited on silica particles

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dc.contributor.authorAden, Moumin
dc.contributor.authorHusson, Jérôme
dc.contributor.authorMonney, Sandrine
dc.contributor.authorFranchi, Marielle
dc.date.accessioned2023-08-18T13:57:30Z
dc.date.available2023-08-18T13:57:30Z
dc.date.issued2019
dc.description.abstractHigh-molecular alginates were extracted from Djiboutian brown seaweeds, Sargassum sp. (S) and Turbinaria (T) and isolated as sodium salts in 31.0 and 42.7% yield by weight. 1H NMR analysis of the uronic acid block-structure indicates mannuronic/guluronic M/G ratios of 0.49 and 3.0 for the alginates extracts, respectively. The resulting alginates were deposited onto native Aerosil 200 silica, amine-functionalized and carboxyl-functionalized silica particles to enhance the mechanical strength providing Alg.(T/S)+SiO2) Alg.(T/S)+SiO2NH2) and Alg.(T)+SiO2CO2H) composites. Taking Pb(II) as examples for toxic heavy metal ions, the effects of the pH, adsorption kinetics, and isotherms have been studied systematically. The best uptake achieved was 585 mg Pb2+ ion/g using Alg.S+SiO2NH2. Furthermore, the Pb(II) ions were successfully desorbed in several cycles from Alg.T+SiO2 using 0.5 M hydrochloric acid. Therefore, Alg.T+SiO2 may be considered as a low-cost biosorbent that quickly adsorbs and easily desorbs analyte lead ions. A comparison of the adsorption capacity of our biopolymer-coated particles with that of other adsorbents reported in the literature reveals that our materials are among the best performing for the adsorption of Pb(II).en_US
dc.description.sponsorshipUD College of Engineeringen_US
dc.identifier.citationPure Appl. Chemen_US
dc.identifier.issn1365-3075
dc.identifier.urihttp://hdl.handle.net/123456789/2039
dc.language.isoenen_US
dc.publisherPure Appl. Chemen_US
dc.relation.ispartofseriesPure Appl. Chem;2019; 91(3)
dc.subjectadsorptionen_US
dc.subjectalginatesen_US
dc.subjectbiopolymeren_US
dc.subjectkinetic studiesen_US
dc.subjectleaden_US
dc.subjectPOC-17en_US
dc.subjectsilicaen_US
dc.subjectUD College of Engineeringen_US
dc.subjectCoE_Djiboutien_US
dc.subjectUniversité de Djiboutien_US
dc.subjectDjiboutien_US
dc.subjectEngineeringen_US
dc.subjectMarielle Franchien_US
dc.subjectMichael Knorren_US
dc.titleBiosorption of Pb(II) ions from aqueous solution using alginates extracted from Djiboutian seaweeds and deposited on silica particlesen_US
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