Characterization of diatomaceous earth modified by organic ligands for enhanced zinc adsorption

dc.creatorSosa, Griselda Leonor
dc.creatorFernández Morantes, César
dc.creatorFlores, Federico Manuel
dc.creatorTorres Sanchez, Rosa Maria
dc.creatorZalts, Anita
dc.creatorRamírez, Silvana Andrea María
dc.date.accessioned2021-03-26T02:48:29Z
dc.date.accessioned2022-10-15T12:10:49Z
dc.date.available2021-03-26T02:48:29Z
dc.date.available2022-10-15T12:10:49Z
dc.date.created2021-03-26T02:48:29Z
dc.date.issued2019-08
dc.identifierSosa, Griselda Leonor; Fernández Morantes, César; Flores, Federico Manuel; Torres Sanchez, Rosa Maria; Zalts, Anita; et al.; Characterization of diatomaceous earth modified by organic ligands for enhanced zinc adsorption; Elsevier; Journal of Environmental Chemical Engineering; 7; 4; 8-2019; 1-8
dc.identifier2213-3437
dc.identifierhttp://hdl.handle.net/11336/129002
dc.identifierCONICET Digital
dc.identifierCONICET
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/4384460
dc.description.abstractIn order to enhance zinc adsorption, natural diatomaceous earth was modified by a simple batch procedure incorporating ligands with carboxylic and amine functional groups: ethylenediaminetetraacetic acid and 2-N(hydroxyethyl) iminodiacetic acid were used. The supernatants were analysed by square wave anodic stripping voltammetry monitored titrations to quantify ligand incorporation to the diatomaceous earth. The solids were characterized by energy-dispersive X-ray spectroscopy, scanning electron microscopy, X-ray diffraction, electrophoretic mobility, Fourier transform infrared spectroscopy and thermogravimetric analyses. Ligands modified the surface of the natural solid and were unable to enter the interlayer space of the smectite, main component of diatomaceous earth. Langmuir model was the most suitable to describe Zn(II) adsorption on diatomaceous earth whereas Freundlich showed better fit to data of the modified solids. The incorporation of organic ligands increased zinc retention by ca. 50%.
dc.languageeng
dc.publisherElsevier
dc.relationinfo:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.jece.2019.103197
dc.relationinfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S2213343719303203
dc.rightshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.subject2-N(HYDROXYETHYL) IMINODIACETIC ACID
dc.subjectADSORPTION
dc.subjectDIATOMACEOUS EARTH
dc.subjectETHYLENEDIAMINE TETRAACETIC ACID
dc.subjectZINC
dc.titleCharacterization of diatomaceous earth modified by organic ligands for enhanced zinc adsorption
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:ar-repo/semantics/artículo
dc.typeinfo:eu-repo/semantics/publishedVersion


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