碳纳米管对水中多氯联苯的吸附动力学

曹秀芹; 程琳; 李志强

doi:10.12030/j.cjee.201702134

环境工程学报

碳纳米管对水中多氯联苯的吸附动力学

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曹秀芹, 程琳, 李志强. 碳纳米管对水中多氯联苯的吸附动力学[J]. 环境工程学报, 2017, 11(9): 5041-5048. doi: 10.12030/j.cjee.201702134

引用本文:

曹秀芹, 程琳, 李志强. 碳纳米管对水中多氯联苯的吸附动力学[J]. 环境工程学报, 2017, 11(9): 5041-5048. doi: 10.12030/j.cjee.201702134

CAO Xiuqin, CHENG Lin, LI Zhiqiang. Adsorption kinetics of carbon nanotubes on polychlorinated biphenyls in aqueous solution[J]. Chinese Journal of Environmental Engineering, 2017, 11(9): 5041-5048. doi: 10.12030/j.cjee.201702134

Citation:

CAO Xiuqin, CHENG Lin, LI Zhiqiang. Adsorption kinetics of carbon nanotubes on polychlorinated biphenyls in aqueous solution[J]. Chinese Journal of Environmental Engineering, 2017, 11(9): 5041-5048. doi: 10.12030/j.cjee.201702134

碳纳米管对水中多氯联苯的吸附动力学

1.
北京建筑大学城市雨水系统与水环境省部共建教育部重点实验室, 北京 100044
基金项目:
北京市教委（北京市自然科学基金）科技重点项目（KZ201310016017）
中图分类号: X703

Adsorption kinetics of carbon nanotubes on polychlorinated biphenyls in aqueous solution

1.
Key Laboratory of Urban Storm Water System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
Fund Project:

摘要: 通过静态吸附实验研究了碳纳米管（CNTs）对水中多氯联苯（PCBs）的吸附动力学特性，包括1种单壁碳纳米管（SWCNTs）和3种多壁碳纳米管（MWCNTs），并对4种CNTs的物理特征及孔径分布进行了分析。结果表明，SWCNTs的比表面积和总孔容最大，分别为228.210 m2·g-1和1.515 4 cm3·g-1。CNTs对PCBs的吸附速率很快，40 min吸附量可达到平衡时的90%以上，80 min左右达到吸附平衡，且SWCNTs的吸附能力远大于MWCNTs。运用拟一级和拟二级动力学模型对实验数据进行拟合，表明拟二级模型更适合描述CNTs对PCBs的吸附过程。
- 碳纳米管 /
- 多氯联苯 /
- 吸附 /
- 拟一级动力学 /
- 拟二级动力学
Abstract: Static experiments were carried out to investigate adsorption kinetics of polychlorinated biphenyls (PCBs) on carbon nanotubes (CNTs) from aqueous solution, including a single-walled carbon nanotubes (SWCNTs) and three kinds of multi-walled carbon nanotubes (MWCNTs). And the physical characteristics and pore size distribution of CNTs were analyzed. The results showed that SWCNTs' specific surface area and total pore volume were the largest, which were 228.210 m2·g-1 and 1.515 4 cm3·g-1, respectively. The adsorption rate of CNTs on PCBs was so fast that the adsorption capacity of 40 min can reach more than 90% of equilibrium, and the adsorption equilibrium was reached at about 80 min. Furthermore, the adsorption capacity of SWCNTs was much larger than that of MWCNTs. The pseudo-first-order model and pseudo-second-order model were used to fit the experimental data, which indicated that the pseudo-second-order model showed more suitable to describe the adsorption process of PCBs to CNTs.
- carbon nanotubes /
- polychlorinated biphenyls /
- adsorption /
- pseudo-first-order kinetics /
- pseudo-second-order kinetics

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曹秀芹, 程琳, 李志强. 碳纳米管对水中多氯联苯的吸附动力学[J]. 环境工程学报, 2017, 11(9): 5041-5048. doi: 10.12030/j.cjee.201702134

引用本文:

曹秀芹, 程琳, 李志强. 碳纳米管对水中多氯联苯的吸附动力学[J]. 环境工程学报, 2017, 11(9): 5041-5048. doi: 10.12030/j.cjee.201702134

Citation:

碳纳米管对水中多氯联苯的吸附动力学

1. 北京建筑大学城市雨水系统与水环境省部共建教育部重点实验室, 北京 100044

收稿日期: 2017-04-06

基金项目:

北京市教委（北京市自然科学基金）科技重点项目（KZ201310016017）

关键词:

摘要: 通过静态吸附实验研究了碳纳米管（CNTs）对水中多氯联苯（PCBs）的吸附动力学特性，包括1种单壁碳纳米管（SWCNTs）和3种多壁碳纳米管（MWCNTs），并对4种CNTs的物理特征及孔径分布进行了分析。结果表明，SWCNTs的比表面积和总孔容最大，分别为228.210 m2·g-1和1.515 4 cm3·g-1。CNTs对PCBs的吸附速率很快，40 min吸附量可达到平衡时的90%以上，80 min左右达到吸附平衡，且SWCNTs的吸附能力远大于MWCNTs。运用拟一级和拟二级动力学模型对实验数据进行拟合，表明拟二级模型更适合描述CNTs对PCBs的吸附过程。

English Abstract

Adsorption kinetics of carbon nanotubes on polychlorinated biphenyls in aqueous solution

1. Key Laboratory of Urban Storm Water System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 100044, China

Received Date: 2017-04-06

Fund Project:

Keywords:

Abstract: Static experiments were carried out to investigate adsorption kinetics of polychlorinated biphenyls (PCBs) on carbon nanotubes (CNTs) from aqueous solution, including a single-walled carbon nanotubes (SWCNTs) and three kinds of multi-walled carbon nanotubes (MWCNTs). And the physical characteristics and pore size distribution of CNTs were analyzed. The results showed that SWCNTs' specific surface area and total pore volume were the largest, which were 228.210 m2·g-1 and 1.515 4 cm3·g-1, respectively. The adsorption rate of CNTs on PCBs was so fast that the adsorption capacity of 40 min can reach more than 90% of equilibrium, and the adsorption equilibrium was reached at about 80 min. Furthermore, the adsorption capacity of SWCNTs was much larger than that of MWCNTs. The pseudo-first-order model and pseudo-second-order model were used to fit the experimental data, which indicated that the pseudo-second-order model showed more suitable to describe the adsorption process of PCBs to CNTs.