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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
shu

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: 06/04/2017
    Accepted Date: 23/02/2017
    Available Online: 26/08/2017
    Fund Project:
  • 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.
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Adsorption kinetics of carbon nanotubes on polychlorinated biphenyls in aqueous solution

  • Received Date: 06/04/2017
  • Accepted Date: 23/02/2017
  • Available Online: 26/08/2017
Fund Project:

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.

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