Bacteria-Modified Red Mud for Adsorption of Cadmium Ions from Aqueous Solutions

Basit Öğe Kaydı
dc.contributor.authorKalkan, Ekrem
dc.contributor.authorNadaroglu, Hayrunnisa
dc.contributor.authorDikbas, Neslihan
dc.contributor.authorTasgin, Esen
dc.contributor.authorCelebi, Neslihan
dc.date.accessioned2024-10-04T18:48:22Z
dc.date.available2024-10-04T18:48:22Z
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 degrees 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 Delta G degrees, Delta H degrees, and Delta S degrees were calculated and the negative value of AG obtained indicate that the process was spontaneous, and the positive value of Delta H degrees confirms the reaction to be endothermic, and the positive value of Delta S degrees 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.description.sponsorshipResearch Development Center of Ataturk University [2011/80]; Ataturk Universityen_US
dc.description.sponsorshipThis research has been performed under the project numbered 2011/80 and supported by the Research Development Center of Ataturk University. The authors acknowledge the support of Ataturk University for this work. They also are deeply grateful to anonymous reviewers for their helpful comments on the manuscript.en_US
dc.identifier.endpage429en_US
dc.identifier.issn1230-1485
dc.identifier.issn2083-5906
dc.identifier.issue2en_US
dc.identifier.startpage417en_US
dc.identifier.urihttp://hdl.handle.net/20.500.12403/3031
dc.identifier.volume22en_US
dc.identifier.wosWOS:000317093200013en_US
dc.identifier.wosqualityQ4en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.language.isoenen_US
dc.publisherHarden_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.subjectwastewateren_US
dc.subjectbacteria-modified red muden_US
dc.subjectcadmium removalen_US
dc.subjectadsorption isothermen_US
dc.subjectadsorption kineticen_US
dc.subjectadsorption thermodynamicen_US
dc.titleBacteria-Modified Red Mud for Adsorption of Cadmium Ions from Aqueous Solutionsen_US
dc.typeArticleen_US

Dosyalar

Koleksiyon

WoS İndeksli Yayınlar Koleksiyonu