Yazar "Özcan, Asiye Safa" için listeleme
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Biosorption of lead(II) ions onto waste biomass of Phaseolus vulgaris L.: estimation of the equilibrium, kinetic and thermodynamic parameters
Özcan, Asiye Safa; Tunalı, Sibel; Akar, Tamer; Özcan, Adnan (Elsevier Science BV, 2009)Biosorption of lead(II) ions onto Phaseolus vulgaris L. waste was investigated with the variation in the parameters of pH, contact time, biosorbent and lead(II) concentrations and temperatures. The nature of the possible ... -
Biosorption potential of Neurospora crassa cells for decolorization of Acid Red 57 (AR57) dye
Akar, Tamer; Demir, Temir A.; Kıran, İsmail; Özcan, Adnan; Özcan, Asiye Safa; Tunalı, Sibel (John Wiley & Sons LTD, 2006)Biosorption of Acid Red 57 (AR57) on to Neurospora crassa was studied with variation of pH, contact time, biosorbent and dye concentrations and temperature to determine equilibrium and kinetic models. The AR57 biosorption ... -
Capacity of Activated Carbon Derived from Peach Stones by K2CO3 in the Removal of Acid, Reactive, and Direct Dyes from Aqueous Solution
Gerçel, Özgül; Özcan, Adnan; Özcan, Asiye Safa; Gerçel, Hasan Ferdi (Asce-Amer Soc Civil Engineers, 2009)The present research deals with the production of activated carbon by chemical activation using peach stones and its adsorption behavior. The prepared activated carbon was used for the adsorption of three kinds of textile ... -
Characterization and lead(II) ions removal of modified Punica granatum L. peels
Ay, Çiğdem Ömeroğlu; Özcan, Asiye Safa; Erdoğan, Yunus; Özcan, Adnan (Taylor & Francis Inc, 2017)The aim of the present study was to enhance the biosorption capacity of a waste biomass of Punica granatum L. peels (PGL) using various chemical modification agents. Among these agents, hexamethylenediamine (HMDA) indicated ... -
Characterization of natural- and organo-bentonite by XRD, SEM, FT-IR and thermal analysis techniques and its adsorption behaviour in aqueous solutions
Ikhtiyarova, G. A.; Özcan, Asiye Safa; Gök, Özer; Özcan, Adnan (Mineralogical Soc, 2012)In this study, natural bentonite was modified with hexadecyltrimethylammonium (HDTMA) bromide to obtain organobentonite (HDTMA-bentonite). Bentonite and HDTMA-bentonite were then characterized using XRD, XRF, SEM, FT-IR, ... -
Characterization of Punica granatum L. peels and quantitatively determination of its biosorption behavior towards lead(II) ions and Acid Blue 40
Ay, Çiğdem Ömeroğlu; Özcan, Asiye Safa; Erdoğan, Yunus; Özcan, Adnan (Elsevier Science BV, 2012)In this study, a waste biomass of Punica granatum L. (P. granatum L.) peels was firstly characterized by means of Brunauer-Emmett-Teller (BET) surface area, elemental analysis, FT-IR, thermogravimetric (TG) analysis and ... -
Comparison of supercritical fluid and Soxhlet extractions for the quantification of hydrocarbons from Euphorbia macroclada
Özcan, Adnan; Özcan, Asiye Safa (Elsevier Science BV, 2004)This study compares conventional Soxhlet extraction and analytical scale supercritical fluid extraction (SFE) for their yields in extracting of hydrocarbons from arid-land plant Euphorbia macroclada. The plant material was ... -
Determination of the equilibrium, kinetic and thermodynamic parameters of adsorption of copper(II) ions onto seeds of Capsicum annuum
Özcan, Adnan; Özcan, Asiye Safa; Tunalı, Sibel; Akar, Tamer; Kıran, İsmail (Elsevier Science BV, 2005)Adsorption of copper ions onto Capsicum annuum (red pepper) seeds was investigated with the variation in the parameters of pH, contact time, adsorbent and copper(II) concentrations and temperature. The nature of the possible ... -
Effects of different parameters on the synthesis of silica aerogel microspheres in supercritical CO2 and their potential use as an adsorbent
Başaran, Ersin; Arıcı, Tuğba Alp; Özcan, Adnan; Gök, Özer; Özcan, Asiye Safa (Springer, 2019)Synthesis of metal oxide microspheres in supercritical carbon dioxide (SCO2) is very attractive for a wide range of applications such as catalysis, controlled release, and separation science due to their identical properties. ... -
Equilibrium and kinetics of biosorption of lead(II) from aqueous solutions by Cephalosporium aphidicola
Tunalı, Sancar; Akar, Tamer; Özcan, Asiye Safa; Kıran, I; Özcan, Adnan (Elsevier Science BV, 2006)Biosorption of lead(II) onto Cephalosporium aphidicola was examined and the effects of pH, contact time, biosorbent and lead(II) concentrations and temperature on biosorption were investigated. The nature of the possible ... -
Evaluation on dye removal capability of didodecyldimethylammonium-bentonite from aqueous solutions
Öncü-Kaya, Elif Mine; Side, Nilgün; Gök, Özer; Özcan, Asiye Safa; Özcan, Adnan (Taylor & Francis Inc, 2017)The removal efficiency of Reactive Blue 19 (RB19) by using surfactant-modified bentonite (MB) from aqueous solutions, and also textile wastewater samples was examined. Natural bentonite (NB) was firstly modified with ... -
Experimental and theoretical investigations of novel synthesized organo-silane compounds and modified mesoporous silica materials
Ermiş, Emel; Demircioğlu, Yasemin Suzen; Özcan, Asiye Safa (Elsevier Science BV, 2019)In this study, the novel compounds (2,5-dimethoxy-methanimine propyltriethoxysilane; S1 and 3-ethoxy-salicylaldimine propyltriethoxysilane; S2) derived from aminopropyltriethoxysilane (APTES) were synthesized by a simple ... -
Immobilization of 2,2 '-dipyridyl onto bentonite and its adsorption behavior of copper(II) ions
Erdem, Bilge; Özcan, Adnan; Gök, Özer; Özcan, Asiye Safa (Elsevier Science BV, 2009)In this study, the immobilization of 2,2'-dipyridyl onto bentonite was firstly carried out and it was then used for the adsorption of copper(II) ions from aqueous solutions. The variation of the parameters of pH, contact ... -
Kinetics and equilibrium studies for the adsorption of Acid Red 57 from aqueous solutions onto calcined-alunite
Tunalı, Sibel; Özcan, Asiye Safa; Özcan, Adnan; Gedikbey, Tevfik (Elsevier Science BV, 2006)The adsorption of Acid Red 57 (AR57) onto calcined-alunite was examined in aqueous solution in a batch system with respect to contact time. pH and temperature. The first-order, pseudo-second-order Kinetic and the intraparticle ... -
Kinetics, isotherm and thermodynamic studies of adsorption of Acid Blue 193 from aqueous solutions onto natural sepiolite
Özcan, Adnan; Öncü Kaya, Elif Mine; Özcan, Asiye Safa (Elsevier Science BV, 2006)In the present study, natural sepiolite was used as an adsorbent for the investigation of the adsorption kinetics, isotherms and thermodynamic parameters of an acid dye (Acid Blue 193, AB 193) from aqueous solution at ... -
Measurement and correlation of solubility of Acid Red 57 in supercritical carbon dioxide by ion-pairing with hexadecyltrimethylammonium bromide
Özcan, Asiye Safa; Özcan, Adnan (Elsevier Science BV, 2006)Solubility of C.I. Acid Red 57 (AR57) in supercritical carbon dioxide was measured by ion-pairing with hexadecyltrimethylammonium (HDTMA) bromide. The solubility measurements of AR57 and AR57-HDTMA in supercritical carbon ... -
Modification of bentonite with a cationic surfactant: An adsorption study of textile dye Reactive Blue 19
Özcan, Adnan; Ömeroğlu, Çiğdem; Erdoğan, Yunus; Özcan, Asiye Safa (Elsevier Science BV, 2007)The utilization of modified bentonite with a cationic surfactant (dodecyltrimethylammonium (DTMA) bromide) as an adsorbent was successfully carried out to remove a synthetic textile dye (Reactive Blue 19 (RB 19)) by ... -
Preparation of activated carbon from a renewable bio-plant of Euphorbia rigida by H2SO4 activation and its adsorption behavior in aqueous solutions
Gerçel, Özgül; Özcan, Adnan; Özcan, Asiye Safa; Gerçel, Hasan Ferdi (Elsevier Science BV, 2007)The use of activated carbon obtained from Euphorbia rigida for the removal of a basic textile dye, which is methylene blue, from aqueous solutions at various contact times, pHs and temperatures was investigated. The plant ... -
Preparation of HDTMA-bentonite: Characterization studies and its adsorption behavior toward dibenzofuran
Erdem, Bilge; Özcan, Asiye Safa; Özcan, Adnan (Wiley, 2010)Bentonite is one of the most commonly used raw materials in the water treatment processes because of its low cost, easily availability and high mechanical and chemical stability. In this study, natural bentonite was modified ... -
Solubility of an acid dye in supercritical carbon dioxide by ion-pairing with dodecyltrimethylammonium bromide
Özcan, Adnan; Özcan, Asiye Safa (Elsevier Science BV, 2006)In this study, solubility of Acid Red 57 (AR57), which is an anionic dye, in supercritical CO2 was investigated using an ion-pairing with dodecyltrimethylammonium (DTMA) bromide. The measurements of AR57 and AR57-DTMA in ...