Biosorption characteristics of uranium(VI) from aqueous solution by pummelo peel |
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| Authors: | Qin Li Yunhai Liu Xiaohong Cao Cui Pang Youqun Wang Zhibin Zhang Yating Liu Ming Hua |
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| Affiliation: | 1. Key Laboratory Breeding Base of Nuclear Resources and Environment, East China Institute of Technology, Ministry of Education, Nanchang, 330013, People??s Republic of China
2. Department of Chemistry, Biological and Materials Sciences, East China Institute of Technology, Fuzhou, 344000, People??s Republic of China
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| Abstract: | The biomass pummelo peel was chosen as a biosorbent for removal of uranium(VI) from aqueous solution. The feasibility of adsorption of U(VI) by Pummelo peel was studied with batch adsorption experiments. The effects of contact time, biosorbent dosage and pH on adsorption capacity were investigated in detail. The pummelo peel exhibited the highest U(VI) sorption capacity 270.71?mg/g at an initial pH of 5.5, concentration of 50???g/mL, temperature 303?K and contacting time 7?h. The adsorption process of U(VI) was found to follow the pseudo-second-order kinetic equation. The adsorption isotherm study indicated that it followed both the Langmuir adsorption isotherm and the Freundlich adsorption isotherm. The thermodynamic parameters values calculated clearly indicated that the adsorption process was feasible, spontaneous and endothermic in nature. These properties show that the pummelo peel has potential application in the removal of the uranium(VI) from the radioactive waste water. |
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