Removal of methylene blue from aqueous solutions by using cold plasma- and formaldehyde-treated onion skins

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dc.authoridSAHIN, Omer/0000-0003-4575-3762
dc.authoridSAKA, Cafer/0000-0003-2534-5921
dc.contributor.authorSaka, Cafer
dc.contributor.authorSahin, Omer
dc.date.accessioned2024-12-24T19:29:34Z
dc.date.available2024-12-24T19:29:34Z
dc.date.issued2011
dc.departmentSiirt Üniversitesi
dc.description.abstractIn this paper, the use of cold plasma-treated and formaldehyde-treated onion skins as a biosorbent has been investigated to remove methylene blue dye from aqueous solutions. The surface characteristics of the treated onion skins were investigated using Fourier Transform-infrared spectroscopy. The influence of process variables such as adsorbent dosage, initial dye concentration and pH were studied. Equilibrium isotherms were analysed by Langmuir, Freundlich, Temkin and Dubinin-Radushkevich isotherm models. The results indicated that the data for adsorption of methylene blue onto onion skins fitted well with the Langmuir isotherm model. The sorption capacities for cold plasma-treated and formaldehyde-treated onion skins by Langmuir isotherm were found to be 250 and 166.67 mg/g, respectively. The equilibrium time was found to be 150 min for 50 mg/l dye concentrations. The maximum removals for cold plasma-treated and formaldehyde-treated onion skins obtained were 90.94 and 95.54% at natural pH 10.0 for adsorbent doses of 0.15 g/200 ml, respectively. The rates of sorption were found to conform to pseudo-first-order kinetics. Results indicated that onion skins could be used as a biosorbent to remove methylene blue dye from contaminated waters.
dc.identifier.doi10.1111/j.1478-4408.2011.00306.x
dc.identifier.endpage255
dc.identifier.issn1472-3581
dc.identifier.issn1478-4408
dc.identifier.issue4
dc.identifier.scopus2-s2.0-79960214479
dc.identifier.scopusqualityQ2
dc.identifier.startpage246
dc.identifier.urihttps://doi.org/10.1111/j.1478-4408.2011.00306.x
dc.identifier.urihttps://hdl.handle.net/20.500.12604/7137
dc.identifier.volume127
dc.identifier.wosWOS:000292607700007
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherWiley
dc.relation.ispartofColoration Technology
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20241222
dc.titleRemoval of methylene blue from aqueous solutions by using cold plasma- and formaldehyde-treated onion skins
dc.typeArticle

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