Modification of multi-walled carbon nanotubes with tannic acid for the adsorption of La, Tb and Lu ions
作者： Shanshan Tong , Shujie Zhao , Weihong Zhou , Ruigang Li , Qiong Jia
DOI: 10.1007/S00604-011-0622-3
关键词:
摘要: We have prepared an environmental friendly sorbent by modifying multi-walled carbon nanotubes with tannic acid. The adsorption of La (III), Tb (III) and Lu as a function contact time, initial solution pH, quantity adsorbent was studied using batch technique. Both Langmuir Freundlich isotherms can be used to describe the process. major mechanisms were attributed ion exchange surface complexation. kinetics follows pseudo-second-order model. thermodynamic functions ΔH, ΔG, ΔS indicate that sorption is endothermically driven. adsorbed ions readily desorbed from 1 M hydrochloric
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