University of Oulu

Aiyuan Ma, Xuemei Zheng, Kangqiang Li, Mamdouh Omran, Guo Chen, The adsorption removal of tannic acid by regenerated activated carbon from the spent catalyst of vinyl acetate synthesis, Journal of Materials Research and Technology, Volume 10, 2021, Pages 697-708, ISSN 2238-7854,

The adsorption removal of tannic acid by regenerated activated carbon from the spent catalyst of vinyl acetate synthesis

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Author: Ma, Aiyuan1,2; Zheng, Xuemei1,2; Li, Kangqiang3;
Organizations: 1School of Chemistry and Materials Engineering, Liupanshui Normal University, Liupanshui, 553004, China
2Guizhou Provincial Key Laboratory of Coal Clean Utilisation, Liupanshui, 553004, China
3Key Laboratory of Unconventional Metallurgy, Ministry of Education, Kunming University of Science and Technology, Kunming, 650093, China
4Process Metallurgy Research Group, Faculty of Technology, University of Oulu, Finland
5Key Laboratory of Green-Chemistry Materials in University of Yunnan Province, Kunming Key Laboratory of Energy Materials Chemistry, Yunnan Minzu University, Kunming, 650500, PR China
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 2.6 MB)
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Language: English
Published: Elsevier, 2020
Publish Date: 2021-01-11


Activated carbon can remove humic acid organic pollutants to reduce trihalomethanes carcinogens generated in the chlorination disinfection process. In this study, regenerated activated carbon (RAC) was recycled from the spent catalyst of vinyl acetate synthesis via a thermal regeneration method. The influences of regeneration temperature and time on the regeneration rate and iodine adsorption value of the RAC samples were determined, the nitrogen adsorption isotherms and pore structure characteristics of RAC samples were characterised, and the effects of RAC additive amount, pH, adsorption temperature, and time on tannic acid removal rate were investigated. Results indicated that regeneration time and temperature presented pronounced influences on the regeneration rate and iodine adsorption performance of RAC samples. For the RAC sample optimally prepared at 900 °C for 2 h, the iodine adsorption value, BET surface area, and the regeneration rate were 817 mg/g, 1346 m²/g, and 65.9%, respectively. Under the optimal conditions including RAC additive amount of 3.5 g, temperature of 25 °C, adsorption time of 200 min and pH of 4.0, and tannic acid concentration of 50 mg/L, the tannic acid removal rate reached 89.96%. The adsorption kinetic characteristics for tannic acid onto RAC matched to Pseudo-second-order model, meanwhile the analysis of Boyd dynamic equation and Intraparticle diffusion model denoted the absorption process was mainly controlled by film diffusion. This work provides a technology aiming at the joint treatment of hazardous waste resources, which involve the regeneration activated carbon from spent catalysts and the absorption removal of tannic acid organic pollutants.

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Series: Journal of materials research and technology
ISSN: 2238-7854
ISSN-E: 2214-0697
ISSN-L: 2238-7854
Volume: 10
Pages: 697 - 708
DOI: 10.1016/j.jmrt.2020.12.066
Type of Publication: A1 Journal article – refereed
Field of Science: 218 Environmental engineering
Funding: This work was supported the Guizhou Province Science and Technology Plan Key Project (No. [2019]1444), the Guizhou Provincial Colleges and Universities Science and Technology Top-notch Talent Support Program Project (KY [2018]066), the Liupanshui Science and Technology Project (52020-2018-0304), the Science and Technology Innovation Group of Liupanshui Normol University (LPSSYKJTD201801).
Copyright information: © 2020 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (