期刊论文

Shi, Z.(zhous61@163.com)

中文

湖南大学学报(自然科学版)

1674-2974

2009

36

12

69-73

国家自然科学基金资助项目（50778065）； 欧盟国际合作项目ASEM Water Net（PL510897）； 湖南省自然科学基金资助项目（08JJ3103）；

本校为其他机构

采用3种不同直径的多壁碳纳米管(MWNTs)对1,2,3 - 三氯苯(TCB)进行吸附实验.结果表明,随MWNTs直径减小,1,2,3 - 三氯苯吸附量增加.实验中发现MWNT(L-8)对TCB的吸附仅需150 min就能基本达到平衡,且最大吸附量达77.5 mg/g;其吸附动力学和热力学过程可分别用假二级反应动力学模型和Freundlich吸附等温线模型来描述.在278 K±1 K,288 K±1 K和298 K±1 K下进行的MWNT(L-8)吸附热力学实验所得到的如平衡常数(K~0)、吉布斯自由能(ΔG~0)、标准焓变(ΔH~0)、熵变(ΔS~0)等热力学参数表明,MWNTs吸附TCB过程为自发吸热反应.当pH值在2～11之间变化时,吸附量基本不变,表明H键对MWNTs吸附TCB过程无显著影响,...

Three kinds of multi-walled carbon nanotubes (MWNTs) with different diameters were tested for the adsorption of 1, 2, 3-trichlorobenzene (TCB) from water. Results showed that the adsorption quantity of the tested TCB increased with the decrease of the diameter of MWNTs. Further experiments demonstrated that it took only 150 min for MWNT(L-8) to attain equilibrium, and the maximal adsorption capacity was 77.5 mg/g. The adsorption kinetics and isotherm could be well described with a pseudo-second-order rate model and Freundlich isotherm respectively. The adsorption thermodynamics of 1,2,3-Trichl...