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Modifying coconut shell activated carbon for improved purification of benzene from volatile organic waste gas

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Abstract

In this study, coconut shell-activated carbon was modified by the impregnation method. The best-modified reagent was 1% KOH. Under this condition, acetone’s equilibrium adsorption capacity by modified activated carbon (1% KOH-AC) reached 0.96 mg g−1. The effects of inlet time, inlet flow rate, inlet concentration, and adsorption temperature on the removal efficiency were discussed. With the increase of intake time, the removal efficiency of benzene by coconut shell-activated carbon kept 100% at first and then decreased. The higher the inlet flow rate and concentration, the worse the benzene removal. The lower the operating temperature was, the better the benzene removal was. The purification and adsorption mechanisms were explored by BET and FTIR. The results showed that the Bangham kinetic model fitted the equilibrium adsorption capacity of benzene best.

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Acknowledgements

We thank the Yunnan Innovative Research Team of Environmental pollution, Food Safety, and Human Health for granting the technical guidance towards this research work.

Funding

Partial support of the present study by the Open fund of Key Laboratory of Ecological Environment Evolution and Pollution Control in Mountainous Rural Areas of Yunnan Province (Project No. 2020YB006), Key Laboratory of State Forestry and Grassland Administration on Highly-Efficient Utilization of Forestry Biomass Resources in Southwest China, Southwest Forestry University (Project No. 2020YB006), Scientific research fund of Yunnan Education Department (Project No. YB202023), and Scientific research fund project of Yunnan Education Department (Project No. 2021J0163).

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Authors and Affiliations

  1. College of Ecology and Environment, Key Laboratory of Ecological Environment Evolution and Pollution Control in Mountainous and Rural Areas of Yunnan Province, Southwest Forestry University, 650233, Kunming, China

    Zhihua Deng, Qing Deng, Linqi Wang & Ping Xiang

  2. Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China, Ministry of Education, Southwest Forestry University, 650233, Kunming, China

    Zhihua Deng

  3. School of Chemistry and Chemical Engineering, Guangzhou University, 510006, Guangzhou, China

    Jing Lin

  4. Advanced Materials Division, Engineered Multifunctional Composites (EMC) Nanotech, TN, 37934, LLC Knoxville, USA

    Vignesh Murugadoss

  5. Key Laboratory of Materials Processing and Mold, Ministry of Education, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, 450001, Zhengzhou, China

    Gang Song

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  1. Zhihua Deng
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  2. Qing Deng
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  3. Linqi Wang
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  4. Ping Xiang
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  5. Jing Lin
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  6. Vignesh Murugadoss
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Correspondence to Zhihua Deng, Ping Xiang, Jing Lin or Vignesh Murugadoss.

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Deng, Z., Deng, Q., Wang, L. et al. Modifying coconut shell activated carbon for improved purification of benzene from volatile organic waste gas. Adv Compos Hybrid Mater 4, 751–760 (2021). https://doi.org/10.1007/s42114-021-00273-6

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  • DOI: https://doi.org/10.1007/s42114-021-00273-6

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