Performance of Natural Zeolite and Sepiolite in the Removal of Free Cyanide and Copper-Complexed Cyanide ([Cu(CN)(3)](2-))

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dc.contributor.authorTarlan Yel, Esra
dc.contributor.authorÖnen, Vildan
dc.date.accessioned2020-03-26T18:04:48Z
dc.date.available2020-03-26T18:04:48Z
dc.date.issued2010
dc.departmentSelçuk Üniversitesien_US
dc.description.abstractThe chemical and biological methods employed to date in the removal of free cyanide (CN-) and metal-cyanide complexes from aqueous fluids have proved expensive and problematic. A simpler and more economical approach was attempted in the present study using zeolite and sepiolite. The effectiveness of zeolite from Manisa-Gordes (Turkey) and of sepiolite Eskisehir-Sivrihisar (Turkey) at removing free and Cu-complexed cyanide, [Cu(CN)(3)](2-) was investigated. For removal of CN-, the system performance was examined in terms of concentration, particle size, and retention time. Material with smaller particle sizes (<0.106 mm) performed better, particularly in the case of sepiolite. The maximum CN- removal capacities of zeolite and sepiolite were calculated as 571 and 695 meq/100 g for free CN adsorption, and 455 and 435 meq/100 g for Cu-complexed CN adsorption, respectively. The time to reach equilibrium was calculated as 1050 min. Acid activation, a simple cation adsorption removal method, did not improve the process, instead leading to reduced CN adsorption. Hydroxylated surfaces of metal oxides at the edges of zeolite develop charges and exchange with anions in water. Mg2+ ions located at the edges of the octahedral sheet can create complexes with CN- anions. Moreover, hydrogen bonding with anions (CN- in this case) and H+ of zeolitic water bonded to coordinated water molecules can also create complexes. These two complexes are considered to be effective mechanisms for sepiolite. The effects of both acid activation and CN adsorption were clearly observed in the Fourier-transform infrared spectra. Removal of CN was characterized by the Langmuir isotherm, indicating monolayer coverage with chemical bonding to the surface, which deteriorated during acid activation. The study indicated that zeolite and sepiolite can be used efficiently and easily for removal of free and Cu-complexed CN.en_US
dc.description.sponsorshipTurkish National Scientific Research Council (TUBITAK)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [CAYDAG 103Y026]en_US
dc.description.sponsorshipThe present study was supported financially by the Turkish National Scientific Research Council (TUBITAK) under grant no CAYDAG 103Y026.en_US
dc.identifier.citationTarlan Yel, E., Önen, V., (2010). Performance of Natural Zeolite and Sepiolite in the Removal of Free Cyanide and Copper-Complexed Cyanide ([Cu(CN)(3)](2-)). Clays and Clay Minerals, 58(1), 110-119. Doi: 10.1346/CCMN.2010.0580111
dc.identifier.doi10.1346/CCMN.2010.0580111en_US
dc.identifier.endpage119en_US
dc.identifier.issn0009-8604en_US
dc.identifier.issue1en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage110en_US
dc.identifier.urihttps://dx.doi.org/10.1346/CCMN.2010.0580111
dc.identifier.urihttps://hdl.handle.net/20.500.12395/25151
dc.identifier.volume58en_US
dc.identifier.wosWOS:000276598900011en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorTarlan Yel, Esra
dc.institutionauthorÖnen, Vildan
dc.language.isoenen_US
dc.publisherClay Minerals Socen_US
dc.relation.ispartofClays and Clay Mineralsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.selcuk20240510_oaigen_US
dc.subjectAcid activationen_US
dc.subjectCu-complexeden_US
dc.subjectCyanideen_US
dc.subjectFree cyanideen_US
dc.subjectRemovalen_US
dc.subjectSepioliteen_US
dc.subjectZeoliteen_US
dc.titlePerformance of Natural Zeolite and Sepiolite in the Removal of Free Cyanide and Copper-Complexed Cyanide ([Cu(CN)(3)](2-))en_US
dc.typeArticleen_US

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