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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received July 18, 2020
Accepted September 10, 2020

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Phenol removal via activated carbon from co-pyrolysis of waste coal tar pitch and vinasse

Ming Gao¹ Xiaona Wang¹ Changlei Xia² Na Song³ Yuhui Ma⁴ Qunhui Wang¹ Tianxue Yang⁵ Shengbo Ge² Chuanfu Wu^1† Su Shiung Lam^{2 6†}

¹Department of Environmental Science and Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China ²Co-Innovation Center of Efficient Processing and Utilization of Forestry Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, Jiangsu 210037, China ³Department of Environmental Engineering, Tianjin College, University of Science and Technology Beijing, Tianjin 301830, China ⁴Institute of Seawater Desalination and Multipurpose Utilization, Ministry of Natural Resources, Tianjin 300192, China ⁵State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China ⁶Institute of Tropical Aquaculture and Fisheries (AKUATROP), Universiti Malaysia Terengganu, 21030 Kuala Terengganu, Terengganu, Malaysia

wucf@ustb.edu.cn

Korean Journal of Chemical Engineering, January 2021, 38(1), 64-71(8), 10.1007/s11814-020-0676-1

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Abstract

The behavior and characteristics of phenol adsorption by activated carbon produced from co-pyrolysis of coal tar pitch and vinasse were investigated. Coal tar pitch and vinasse (mass ratio of 1 : 3) were firstly co-pyrolyzed and carbonated at 400 °C for 2 h. The carbonized material produced was then soaked with saturated KOH solution and activated at 800 °C for 1 h to form activated carbon. Results from the phenol wastewater adsorption experiments suggest that pseudo-second-order kinetics and the Weber-Morris model could reflect the time-dependent adsorption behavior of phenol wastewater by the activated carbon, revealing that internal diffusion represents the rate-limiting procedure and dominant process to control the adsorption rate in the early stage of the adsorption. Monolayer adsorption played the key role during the phenol adsorption. The adsorption was an endothermic reaction in temperature ranging from 15 °C to 35 °C, indicating that the adsorption speed could be stimulated by the increasing temperature. This study establishes a theoretical foundation for the usage and the potential application of the activated carbon derived from coal tar pitch and vinasse in wastewater treatment.

Keywords

Coal Tar Pitch Vinasse Activated Carbon Phenol Wastewater Adsorption Kinetics and Thermodynamics

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