Adsorption of heavy metal ions from aqueous solutions by MgCl2 modified orange peel

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

来源：Chinese Journal of Nonferrous Metals, 2011, 21(9): 2270-2276.

• Adsorption capacities
• Adsorption efficiency
• Adsorption process
• Adsorption time
• Metal ion concentration
• Orange peels
• Positive effects
• Single components
• Solid/liquid ratios

Orange peel (OP) was modified by MgCl2 to prepare a novel orange peel adsorbent named as MgOP. The effects of pH, temperature, solid/liquid ratio, adsorption time and metal ion concentration on the removal behavior of individual heavy metals such as Cu2+, Cd2+, Pb2+, Zn2+ and Ni2+ from aqueous solution with single component by MgOP were investigated. The results show that pH and solid/liquid ratio have positive effects on the adsorption efficiency; temperature has little impact on the adsorption efficiency. All adsorption processes can attain equilibrium within 20 min, and the kinetics data of five kinds of metal ions are fitted to pseudo-second-equation. The MgOP can increase the maximum adsorption capacities of Cu2+, Cd2+, Pb2+, Zn2+ and Ni2+, compared with those of OP. The MgOP can be used for more than 10 cycles. The effect of coexisting metal ions on adsorption can be neglected.

• 出版日期2011
• 单位中南大学