An efficient removal of RB5 from aqueous solution by adsorption onto nano-ZnO/Chitosan composite beads

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dc.contributor.authorÇınar S.
dc.contributor.authorKaynar Ü.H.
dc.contributor.authorAydemir T.
dc.contributor.authorÇam Kaynar S.
dc.contributor.authorAyvacıklı M.
dc.date.accessioned2025-04-10T11:08:43Z
dc.date.available2025-04-10T11:08:43Z
dc.date.issued2017
dc.description.abstractIn this study, the removal of Reactive Black 5 (RB-5) by nano-ZnO/Chitosan composite beads (nano-ZnO/CT-CB) from aqueous solution was investigated. ZnO nanoparticles were prepared by the via the microwave-assisted combustion technique. And then nano-ZnO/Chitosan composite beads were prepared by polymerization in the presence of nano-ZnO and chitosan. Characterization of composite beads were conducted using SEM, TEM, FTIR, TGA and XRD. Several important parameters influencing the removal of RB 5 such as contact time, pH and temperature were investigated systematically by batch experiments. At optimum conditions of pH 4 and adsorbent concentration of 0.2 g, dye removal efficiency was found 76%. Langmuir, Freundlich and Temkin adsorption models were used to describe adsorption isotherms and constants. The maximum adsorption capacity (qm) by Langmuir isotherm has been found to be 189.44 mg/g. Isotherms have also been used to obtain the thermodynamic parameters such as free energy, enthalpy and entropy of adsorption. The positive value of the enthalpy change (32.7 kJ/mol) indicated that the adsorption is an endothermic process. The obtained results showed that the tested adsorbents are efficient and alternate low-cost adsorbent for removal of dyes from aqueous media. © 2016 Elsevier B.V.
dc.identifier.DOI-ID10.1016/j.ijbiomac.2016.12.021
dc.identifier.urihttp://hdl.handle.net/20.500.14701/48242
dc.publisherElsevier B.V.
dc.titleAn efficient removal of RB5 from aqueous solution by adsorption onto nano-ZnO/Chitosan composite beads
dc.typeArticle

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