Bacteria-modified red mud for adsorption of cadmium ions from aqueous solutions

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dc.authorid6603145994
dc.authorid6506121388
dc.authorid24166179100
dc.authorid8064145700
dc.authorid7003380948
dc.contributor.authorKalkan E.
dc.contributor.authorNadaroglu H.
dc.contributor.authorDikbaş N.
dc.contributor.authorTaşgin E.
dc.contributor.authorÇelebi N.
dc.date.accessioned20.04.201910:49:12
dc.date.accessioned2019-04-20T21:44:27Z
dc.date.available20.04.201910:49:12
dc.date.available2019-04-20T21:44:27Z
dc.date.issued2013
dc.departmentBayburt Üniversitesien_US
dc.description.abstractCadmium is a toxic metal widely used in industry and it enters the environment from electroplating, smelting, alloy manufacturing, pigments, plastics, cadmium-nickel batteries, fertilizers, pesticides, mining, pigments and dyes, textile operations, and refining industries. Considering the harmful effects of cadmium, it is necessary to remove cadmium from liquid wastes at least to the limit accepted by regulations. The present study describes removal of cadmium from aqueous solutions using bacteria-modified red mud waste material. Batch adsorption experiments have been performed as a function of pH, contact time, temperature, and adsorbent dosage. The optimum results were obtained at pH 4.0, contact time of 60 min, temperature of 30°C, and an adsorbent dose of 1 mg/mL. The adsorption data was correlated with Langmuir and Freundlich adsorption models. The maximum adsorption capacity obtained from Langmuir adsorption model was 83.034 mg/g. The kinetic processes of cadmium adsorption on bacteria-modified red mud were described by applying pseudo-first-order and pseudo-second-order rate equations. The kinetic data for the adsorption process obeyed pseudo-second-order rate equations. Various thermodynamic parameters, such as ?G°, ?H°, and ?15° were calculated and the negative value of ?G° obtained indicate that the process was spontaneous, and the positive value of ?H° confirms the reaction to be endothermic, and the positive value of ?S° shows that the decrease in the degree of freedom of the adsorbed species. The bacteria-modified red mud investigated in this study exhibited a high potential for the removal of cadmium from aqueous solutions.en_US
dc.identifier.endpage429
dc.identifier.issn1230-1485
dc.identifier.issue2
dc.identifier.scopus2-s2.0-84875048633en_US
dc.identifier.scopusqualityN/Aen_US
dc.identifier.startpage417
dc.identifier.urihttps://hdl.handle.net/20.500.12403/861
dc.identifier.volume22
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.relation.ispartofPolish Journal of Environmental Studiesen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectAdsorption isotherm
dc.subjectAdsorption kinetic
dc.subjectAdsorption thermodynamic
dc.subjectBacteria-modified red mud
dc.subjectCadmium removal
dc.subjectWastewater
dc.subjectAdsorption isotherm
dc.subjectAdsorption kinetic
dc.subjectAdsorption thermodynamic
dc.subjectBacteria-modified red mud
dc.subjectCadmium removal
dc.subjectWastewater
dc.titleBacteria-modified red mud for adsorption of cadmium ions from aqueous solutionsen_US
dc.typeArticleen_US

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