Biosorption of Ni(II) from aqueous solutions by living and non-living ureolytic mixed culture
Yükleniyor...
Tarih
2008
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The present study explores the ability and the comparison of living and non-living ureolytic mixed culture (UMC) to remove Ni(II) from aqueous solution. Time dependency experiments for the Ni(II) uptake showed that adsorption equilibrium was reached almost 110 and 60 min after addition Ni(II) of 100 mg/L. The kinetic data were analyzed in term of pseudo-first-order and pseudo-second-order expressions. Ni(II) sorption of living UMC was appropriate with pseudo-first-order kinetic (k1 = 2.15 h-1, R2 = 0.93) while non-living UMC sorbed Ni(II) with respect to second-order kinetics (k2 = 1.64 g/mg h, R2 = 0.98). Also, comparison between the biosorption capacity of untreated living and non-living biomass was conducted for removal of Ni(II). The biosorption process was investigated in equilibrium batch tests for Langmiur, Freundlich and Temkin isotherm models. The data pertaining to the sorption dependence upon Ni(II) ion concentration ranged from 5 to 320 mg/L could be fitted to a Freundlich isotherm model. The capacity constants K of Freundlich model for living and non-living UMC were 1.55 and 0.38 mg/g, respectively; the affinity constants 1/n were 0.47 and 0.75, respectively. Based on the results, the UMC appear to be a potential biosorbent for removal of Ni(II) from wastewater. © 2007 Elsevier B.V. All rights reserved.
Açıklama
PubMed ID: 18029155
Anahtar Kelimeler
Biosorption, Kinetics, Living, Nickel, Non-living, Ureolytic
Kaynak
Colloids and Surfaces B: Biointerfaces
WoS Q Değeri
N/A
Scopus Q Değeri
Q1
Cilt
62
Sayı
1
