期刊名称：Advance Journal of Food Science and Technology
印刷版ISSN：2042-4868
电子版ISSN：2042-4876
出版年度：2015
卷号：7
期号：2
页码：120-128
出版社：MAXWELL Science Publication
摘要：The antibiotic residue was used as a biosorbent for Cr (VI) aqueous solution to investigate its Cr (VI) removal capacity. The effect of experimental parameters, such as pH, sorbent dosage, initial metal concentration and contact time were examined and the optimal experimental conditions were determined. The results showed that 88.61 and 95.07% of Cr (VI) was removed by using the raw and acid-treated antibiotic residue powder as biosorbent. Maximum removal of Cr (VI) ions in aqueous solution was observed at pH 1.0. Biosorption kinetic data were properly fitted with the pseudo-first order kinetic model. The adsorption process followed the Langmuir isotherm adsorption model. Thermodynamic parameters of the adsorption process, such as ΔG°, ΔH° and ΔS°, were calculated and the results indicated that the overall adsorption process were feasible, spontaneous in nature. Finally, the removal mechanism is discussed by deduction from the experimental results, FTIR and SEM images. The adsorption of Cr (VI) coexists with the redox process and the antibiotic residue powder is a potential biosorbent which could be used in treatment of chromium contaminated wastewater.
关键词：Adsorption ; Cr (VI) ; oxidation and reduction ; the antibiotic residue ; thermodynamics ;
