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Adsorptive Removal of p-Nitrophenol from Aqueous Solution by Bone Char: Equilibrium and Kinetic Studies    
Yazarlar (4)
Obiajulu Egbuchunam Theresa
Grace Obi
Ebhodaghe Okieimen Felix
Dr. Öğr. Üyesi Senem YETGİN Dr. Öğr. Üyesi Senem YETGİN
Kastamonu Üniversitesi, Türkiye
Devamını Göster
Özet
Para-nitrophenol adsorbed on bone char synthesized from cow bones has been studied. The Langmuir Freundlich and Sips models were applied to the equilibrium data to describe the adsorption process. The Langmuir model best described the adsorption process with R2= 0.919; and maximum adsorption capacity, qmax of 365.76 mg/g. Batch kinetic studies conformed to pseudo-second-order indicating that several mechanisms may be involved in the process and gave a value of 2.5× 104 g/mg/min for the rate constant for the sorption of p-nitrophenol on bone char. The values of thermodynamic parameters, free energy≈-22.0 kJ/mol, enthalpy-20.2 kJ/mol and entropy 5.34 J/K mol for the adsorption of p-nitrophenol on bone char showed that the adsorption was spontaneous and exothermic.
Anahtar Kelimeler
Makale Türü Özgün Makale
Makale Alt Türü Diğer hakemli uluslarası dergilerde yayınlanan tam makale
Dergi Adı Journal of Chemistry and Chemical Engineering
Dergi ISSN 1934-7375
Makale Dili İngilizce
Basım Tarihi 07-2016
Cilt No 10
Sayı 7
Sayfalar 325 / 335
Doi Numarası 10.17265/1934-7375/2016.07.003
Makale Linki http://www.davidpublisher.org/index.php/Home/Article/index?id=29956.html