SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2016, Vol. 24 ›› Issue (4): 446-452.DOI: 10.1016/j.cjche.2015.11.022

• 第25届中国过程控制会议专栏 • 上一篇    下一篇

Behavior of phenol adsorption on thermal modified activated carbon

Dengfeng Zhang, Peili Huo, Wei Liu   

  1. Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, China
  • 收稿日期:2015-02-09 修回日期:2015-08-31 出版日期:2016-04-28 发布日期:2016-05-27
  • 通讯作者: Dengfeng Zhang
  • 基金资助:

    Supported by the National Natural Science Foundation of China (41302132), Training Programmes of Innovation and Entrepreneurship for Undergraduates of Yunnan Province (Grant No. 201510674042) and the Introduced Talents Foundation of Kunming University of Science and Technology (KKSY201205160).

Behavior of phenol adsorption on thermal modified activated carbon

Dengfeng Zhang, Peili Huo, Wei Liu   

  1. Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, China
  • Received:2015-02-09 Revised:2015-08-31 Online:2016-04-28 Published:2016-05-27
  • Contact: Dengfeng Zhang
  • Supported by:

    Supported by the National Natural Science Foundation of China (41302132), Training Programmes of Innovation and Entrepreneurship for Undergraduates of Yunnan Province (Grant No. 201510674042) and the Introduced Talents Foundation of Kunming University of Science and Technology (KKSY201205160).

摘要: Adsorption process is acknowledged as an effective option for phenolic wastewater treatment. In this work, the activated carbon (AC) samples after thermalmodification were prepared by usingmuffle furnace. The phenol adsorption kinetics and equilibriummeasurementswere carried out under static conditions at temperature ranging from 25 to 55℃. The test results show that the thermal modification can enhance phenol adsorption on AC samples. The porous structure and surface chemistry analyses indicate that the decay in pore morphology and decrease of total oxygen-containing functional groups are found for the thermal modified AC samples. Thus, it can be further inferred that the decrease of total oxygen-containing functional groups on the modified AC samples is the main reason for the enhanced phenol adsorption capacity. For both the raw sample and the optimum modified AC sample at 900℃, the pseudo-second order kinetics and Langmuir models are found to fit the experimental data verywell. Themaximumphenol adsorption capacity of the optimummodified AC sample can reach 144.93 mg·g-1 which is higher than that of the raw sample, i.e. 119.53 mg·g-1. Adsorption thermodynamics analysis confirms that the phenol adsorption on the optimum modified AC sample is an exothermic process and mainly via physical adsorption.

关键词: Adsorbents, Activated carbon, Phenol, Adsorption, Thermal modification, Oxygen-containing functional groups

Abstract: Adsorption process is acknowledged as an effective option for phenolic wastewater treatment. In this work, the activated carbon (AC) samples after thermalmodification were prepared by usingmuffle furnace. The phenol adsorption kinetics and equilibriummeasurementswere carried out under static conditions at temperature ranging from 25 to 55℃. The test results show that the thermal modification can enhance phenol adsorption on AC samples. The porous structure and surface chemistry analyses indicate that the decay in pore morphology and decrease of total oxygen-containing functional groups are found for the thermal modified AC samples. Thus, it can be further inferred that the decrease of total oxygen-containing functional groups on the modified AC samples is the main reason for the enhanced phenol adsorption capacity. For both the raw sample and the optimum modified AC sample at 900℃, the pseudo-second order kinetics and Langmuir models are found to fit the experimental data verywell. Themaximumphenol adsorption capacity of the optimummodified AC sample can reach 144.93 mg·g-1 which is higher than that of the raw sample, i.e. 119.53 mg·g-1. Adsorption thermodynamics analysis confirms that the phenol adsorption on the optimum modified AC sample is an exothermic process and mainly via physical adsorption.

Key words: Adsorbents, Activated carbon, Phenol, Adsorption, Thermal modification, Oxygen-containing functional groups