dc.contributor.author | Koyuncu, Hulya | |
dc.contributor.author | Yildiz, Nuray | |
dc.contributor.author | Salgin, Ugur | |
dc.contributor.author | Koroglu, Fatmanur | |
dc.contributor.author | Calimli, Ayla | |
dc.date.accessioned | 2019-07-27T12:10:23Z | |
dc.date.accessioned | 2019-07-28T10:06:05Z | |
dc.date.available | 2019-07-27T12:10:23Z | |
dc.date.available | 2019-07-28T10:06:05Z | |
dc.date.issued | 2011 | |
dc.identifier.issn | 0304-3894 | |
dc.identifier.uri | https://dx.doi.org/10.1016/j.jhazmat.2010.10.050 | |
dc.identifier.uri | https://hdl.handle.net/20.500.12418/9618 | |
dc.description | WOS: 000286782600101 | en_US |
dc.description | PubMed ID: 21071146 | en_US |
dc.description.abstract | Experiments were conducted on the adsorption characteristics of o-, m- and p-nitrophenols by organically modified bentonites at different temperatures. Two organobentonites (HDTMA-B and PEG-B) were synthesized using hexadecyltrimethylammonium bromide (HDTMABr) and poly(ethylene glycol) butyl ether (PEG). Synthesized HDTMA-B and PEG-B were characterized by XRD, FTIR and DTA-TG analyses and their specific surface area, particle size and pore size distributions were determined. BET surface areas and basal spacings (d(001)) of the HDTMA-B and PEG-B were found to be 38.71 m(2) g(-1), 69.04 m(2) g(-1) and 21.96 angstrom, 15.17 angstrom, respectively. Increased adsorption with temperature indicates that the process is endothermic for o-nitrophenol. On the other hand m- and p-nitrophenols exhibited lower rates of adsorption at higher temperatures suggesting a regular exothermic process taking place. Results were analyzed according to the Langmuir, Freundlich and Dubinin-Redushkevich (D-R) isotherm equations using linearized correlation coefficient at different temperatures. R-L separation factors for Langmuir and the n values for Freundlich isotherms showed that m- and p-nitrophenols are favorably adsorbed by HDTMA-B and, p-nitrophenol is favored by PEG-B. Adsorption of o-, m- and p-nitrophenols as single components or from their binary mixtures on HDTMA-B and, p-nitrophenol on PEG-B are all defined to be physical in nature. (C) 2010 Elsevier B.V. All rights reserved. | en_US |
dc.description.sponsorship | Ankara University [BAP.2002.0745011] | en_US |
dc.description.sponsorship | The authors gratefully acknowledge the funding for this work by Ankara University Scientific Research Projects (Project no: BAP.2002.0745011). | en_US |
dc.language.iso | eng | en_US |
dc.publisher | ELSEVIER SCIENCE BV | en_US |
dc.relation.isversionof | 10.1016/j.jhazmat.2010.10.050 | en_US |
dc.rights | info:eu-repo/semantics/closedAccess | en_US |
dc.subject | Adsorption | en_US |
dc.subject | HDTMAB | en_US |
dc.subject | PEG | en_US |
dc.subject | Nitrophenols | en_US |
dc.subject | Organobentonites | en_US |
dc.title | Adsorption of o-, m- and p-nitrophenols onto organically modified bentonites | en_US |
dc.type | article | en_US |
dc.relation.journal | JOURNAL OF HAZARDOUS MATERIALS | en_US |
dc.contributor.department | [Koyuncu, Hulya] Forens Med Fdn, TR-06300 Ankara, Turkey -- [Yildiz, Nuray -- Koroglu, Fatmanur -- Calimli, Ayla] Ankara Univ, Fac Engn, Dept Chem Engn, TR-06100 Ankara, Turkey -- [Salgin, Ugur] Cumhuriyet Univ, Fac Engn, Dept Chem Engn, TR-58140 Sivas, Turkey | en_US |
dc.identifier.volume | 185 | en_US |
dc.identifier.issue | 02.Mar | en_US |
dc.identifier.endpage | 1339 | en_US |
dc.identifier.startpage | 1332 | en_US |
dc.relation.publicationcategory | Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı | en_US |