Removal of Lead(II) from Aqueous Solutions using Pre-boiled and Formaldehyde-Treated Onion Skins as a New Adsorbent

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dc.contributor.authorCafer, Saka
dc.contributor.authorŞahin, Ömer
dc.contributor.authorDemir, Halil
dc.contributor.authorKahyaoğlu, Mustafa
dc.date.accessioned2019-11-13T08:35:57Z
dc.date.available2019-11-13T08:35:57Z
dc.date.issued2011
dc.departmentBelirleneceken_US
dc.description.abstractThe adsorption characteristics of Pb2+ on pre-boiled treated onion skins (PTOS) and formaldehyde-treated onion skins (FTOS) were evaluated. The effects of Pb2+ initial concentration, agitation rate, solution pH, and temperature on Pb2+ adsorption were investigated in batch systems. Pb2+ adsorption was found to increase with increase in initial concentration. The point of zero net charge (PZC) was 6.53. The optimum pH for the maximum removal of Pb2+ was 6.0. The adsorption equilibrium data was best represented by the Langmuir isotherm model for FTOS and the Freundlich isotherm model for PTOS. The maximum amounts of Pb2+ adsorbed (qm), as evaluated by the Langmuir isotherm, was 200 mgg-1 for FTOS. The efficiencies of PTOS and FTOS for Pb2+ removal were 84,8.0% and 93.5% at 0.15 g/200 mL-1 adsorbent dose, respectively. (C 0 = 50 mg L-1). Study concluded that onion skins, a waste material, have good potential as an adsorbent to remove toxic metals like Pb2+ from water. Boehm titration analysis was conducted to determine the surface groups. It was found that the adsorption kinetics of Pb2+ obeyed pseudo-first-order kinetic model as based on ?q (%) values. FTIR and SEM images before and after adsorption was recorded to explore changes in adsorbent-surface morphology. Activation energy (Ea) was obtained as 25.596 kJ/mol.en_US
dc.identifier.scopus2-s2.0-79952421663
dc.identifier.scopusqualityQ2
dc.identifier.urihttps://hdl.handle.net/20.500.12604/1447
dc.identifier.wosWOS:000288274200017
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoenen_US
dc.publisherTaylor Francisen_US
dc.relation.publicationcategoryUluslararası Hakemli Dergi Makalesien_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.snmzKG_20241224
dc.subjectadsorbent, adsorption, isotherm, kinetic, onion skin, Pb2+en_US
dc.titleRemoval of Lead(II) from Aqueous Solutions using Pre-boiled and Formaldehyde-Treated Onion Skins as a New Adsorbenten_US
dc.title.alternativeSeparation Science and Technologyen_US
dc.typeArticleen_US

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