کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
602489 879979 2008 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Biosorption of Ni(II) from aqueous solutions by living and non-living ureolytic mixed culture
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Biosorption of Ni(II) from aqueous solutions by living and non-living ureolytic mixed culture
چکیده انگلیسی

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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces B: Biointerfaces - Volume 62, Issue 1, 15 March 2008, Pages 97–104
نویسندگان
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