| MWNTs及MWNTs/TiO2对水中1,2,3-三氯苯的吸附特性研究 |
| |
| 引用本文： | 张伟,施周,张茜,徐舜开,张骅.MWNTs及MWNTs/TiO2对水中1,2,3-三氯苯的吸附特性研究[J].环境工程学报,2010,4(12):2647-2652. |
| |
| 作者姓名： | 张伟 施周 张茜 徐舜开 张骅 |
| |
| 作者单位： | 1.湖南大学土木工程学院，长沙 410082； 2.湖南城市学院城市建设系，益阳 413000；3.湖南大学建筑安全与节能教育部重点实验室，长沙 410082,1.湖南大学土木工程学院，长沙 410082；3.湖南大学建筑安全与节能教育部重点实验室，长沙 410082,1.湖南大学土木工程学院，长沙 410082；3.湖南大学建筑安全与节能教育部重点实验室，长沙 410082,1.湖南大学土木工程学院，长沙 410082；3.湖南大学建筑安全与节能教育部重点实验室，长沙 410082,1.湖南大学土木工程学院，长沙 410082；3.湖南大学建筑安全与节能教育部重点实验室，长沙 410082 |
| |
| 基金项目： | 国家自然科学基金资助项目(50778065)；湖南省自然科学基金资助项目(08JJ3103）；湖南省科学计划项目(2010SK3042) |
| |
| 摘 要： | 采用批量平衡实验，对比研究了多壁碳纳米管（MWNTs）及多壁碳纳米管/二氧化钛复合材料（MWNTs/TiO2）对水中1,2,3-三氯苯的吸附特性。结果表明，在相同条件下，MWNTs及MWNTs/TiO2对1,2,3-三氯苯（1,2,3-TCB）的最大吸附量分别为71.8 mg/g和3.05 mg/g，pH值在2~11之间变化时，两者的吸附均不受pH值变化的影响。2种吸附剂的吸附过程均符合拟二级动力学方程，但MWNTs/TiO2对1,2,3-TCB的吸附速率常数为0.4159 g/(mg·min)，约为MWNTs的50倍左右，说明MWNTs/TiO2具有更强的吸附驱动力。1,2,3-TCB在2种吸附剂上的吸附过程均可用Freundlich吸附等温线来描述，其热力学参数吉布斯自由能△G0均为负、标准焓变△H0与熵变△S0均为正表明，MWNTs及MWNTs/TiO2吸附1,2,3-TCB过程为自发吸热反应。与MWNTs相比，MWNTs/TiO2具有可光催化再生的优点，能用于被污染水体的原位修复。
|
| 关 键 词： | 多壁碳纳米管 1 2 3-三氯苯 吸附 动力学 热力学 |
Study on adsorptive features of 1,2,3-trichlorobenzene in water using MWNTs and MWNTs/TiO2 |
| |
| Zhang Wei,Shi Zhou,Zhang Qian,Xu Shunkai and Zhang Hua.Study on adsorptive features of 1,2,3-trichlorobenzene in water using MWNTs and MWNTs/TiO2[J].Techniques and Equipment for Environmental Pollution Control,2010,4(12):2647-2652. |
| |
| Authors: | Zhang Wei Shi Zhou Zhang Qian Xu Shunkai and Zhang Hua |
| |
| Institution: | 1. College of Civil Engineering, Hunan University, Changsha 410082, China; 2. Department of Urban Construction, Hunan City University, Yiyang 413000, China; 3.Key Laboratory of Building Safety and Energy Efficiency, Ministry of Education, Hunan University, Changsha 410082, China,1. College of Civil Engineering, Hunan University, Changsha 410082, China;3.Key Laboratory of Building Safety and Energy Efficiency, Ministry of Education, Hunan University, Changsha 410082, China,1. College of Civil Engineering, Hunan University, Changsha 410082, China;3.Key Laboratory of Building Safety and Energy Efficiency, Ministry of Education, Hunan University, Changsha 410082, China,1. College of Civil Engineering, Hunan University, Changsha 410082, China;3.Key Laboratory of Building Safety and Energy Efficiency, Ministry of Education, Hunan University, Changsha 410082, China and 1. College of Civil Engineering, Hunan University, Changsha 410082, China;3.Key Laboratory of Building Safety and Energy Efficiency, Ministry of Education, Hunan University, Changsha 410082, China |
| |
| Abstract: | Adsorptive characteristics of 1,2,3-TCB in aqueous solutions on both MWNTs and MWNTs/TiO2 were comparatively studied through batch equilibrium tests.The results showed that,under the same tested condition,the maximum adsorption capacity of MWNTs and MWNTs/TiO2 were 71.8 mg/g and 3.05 mg/g,respectively,and none of the adsorption was depended on pH value variation from 2~11.The adsorption of the two tested adsorbents conformed to be pseudo-second-order kinetics,however,the adsorption rate constant of MWNTs/Ti... |
| |
| Keywords: | multi-walled carbon nanotubes 1 2 3-trichlorobenzene adsorption kinetics thermodynamics |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《环境工程学报》浏览原始摘要信息 |
| 点击此处可从《环境工程学报》下载免费的PDF全文 |
|
