Adsorption properties of modified persimmon biosorbent on Cu2+ and Pb2+

作者：Guo Xue Yi^*; Gong Qi Qi; Liang Sha; Tian Qing Hua; Xiao Cai Mei

来源：Chinese Journal of Nonferrous Metals, 2012, 22(2): 599-603.

• Adsorption behavior
• Adsorption capacities
• Adsorption process
• Adsorption properties
• Adsorption time
• Biosorbents
• Chemical process
• Equilibrium isotherms
• Freundlich equations
• Langmuir equation
• Metal ion concentration
• Pseudo second order kinetics
• Solid-liquid ratio
• Solution pH

The persimmon powder was used as raw material to prepare two persimmon biosorbents SPP and HPP by chemical modification with H2SO4 and HNO3, respectively. The adsorption behaviors of Cu2+and Pb2+ in aqueous solutions on two persimmon biosorbents were investigated. The effects of solution pH, solid-liquid ratio, temperature, adsorption time and metal ion concentration were considered. The results show that the adsorption process of SPP and HPP can be well described by pseudo-second order kinetic equation. The fitting effect of equilibrium isotherms follows Langmuir equation better than that of the Freundlich equation. The maximum adsorption capacities of Cu2+ and Pb2+ on SPP are 61.47 mg/g and 207.90 mg/g, respectively. And the maximum adsorption capacities of Cu2+ and Pb2+ on HPP are 64.0 mg/g and 220.8 mg/g, respectively. The adsorption is controlled by chemical process.

• 出版日期2012
• 单位中南大学