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《科学通报(英文版)》 2003-05
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Surface characteristics of modified carbon nanotubes and its application in lead adsorption from aqueous solution

WANG Shuguang1, LI Yanhui2, Gong Xiaoyan1, ZHAO Huazhang1, LUAN Zhaokun1, XU Cailu2 & WU Dehai2 1. State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sci-ences, Beijing 100085, China; 2. Department of Mechanical Engineering, State Key Laboratory ofAutomotive Safety and Energy, Tsinghua University, Beijing 100084, China Correspondence should be addressed to Wang Shuguang (e-mail: wsg@ sdu.edu.cn)  
Carbon nanotubes (CNT) were modified bynitric acid oxidation. Infrared spectroscopy (IR) demon-strated that hydroxyl (—OH) and carbonyl (—C== O) func-tional groups were introduced to the surface of modifiedCNT. Micrometrics ASAP 2000 measurement showed that the surface area of modified CNT was slightly increased.Furthermore, the Pb2+ adsorption behavior on the surface of modified CNT has been investigated. The results indicate that the modified CNT has an exceptional adsorption capa-bility for Pb2+ removal. The adsorption isotherms are well described by the Langmuir equation under test temperatures and the kinetics level is three.
【Fund】: the National Natural Science Foundation of China (Grant No.50178067)
【CateGory Index】: TB383
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