Effects of biosorption parameter: kinetics, isotherm and thermodynamics for Ni(II) biosorption from aqueous solution by Circinella sp.
Küçük Resim Yok
Tarih
2010
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Univ Catolica De Valparaiso
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Circinella sp. was employed as a biosorbent for removal of Ni(II) from aqueous solution. The biosorption kinetics and isotherms were investigated. The effect of several parameters, such as biosorbent dosage, contact time, initial concentration, pH and temperature, on biosorption process was evaluated. The kinetic studies indicated that the biosorption followed pseudo-second order kinetic model. Biosorption behaviour of Ni(II) on Circinella sp. was expressed by both Langmuir and Freundlich isotherms. The equilibrium data fit better to the Langmuir model compared to the Freundlich model in concentration range studied (1.0-3.0 mM). The thermodynamic parameters (Delta G(0), Delta H-0 and Delta S-0) were also determined, and it was found that the Ni(II) biosorption by Circinella sp. was spontaneous and endothermic in nature.
Açıklama
Anahtar Kelimeler
biosorption, Circinella sp., equilibrium, kinetic, nickel
Kaynak
Electronic Journal of Biotechnology
WoS Q Değeri
Q4
Scopus Q Değeri
Cilt
13
Sayı
5
