Abstract
This study evaluated how acid treatment affects the ability of customized beads of activated carbon (BAC) to remove formaldehyde from air. Two different acids (hydrofluoric acid and sulfuric acid) were used to modify the surface of BAC prepared from a polymer material. The acid-modified BACs were further subjected to heat treatment. Physical and chemical characteristics of modified and unmodified BACs were investigated using nitrogen adsorption, Fourier transform infrared spectroscopy, Raman spectroscopy, X-ray fluorescence, and X-ray photoelectron spectroscopy. Formaldehyde removal was evaluated under both dry and moist conditions. From the results, acid treatment clearly improved the adsorption performance, especially under the moist condition. Qualitative and quantitative surface analyses were conducted, mainly to examine the amount of O-bonds after acid treatment and the formation of S–O or Cl–O on BAC.
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This work was supported by Korea Environment Industry & Technology Institute (KEITI) through the Prospective Green Technology Innovation Project, funded by Korea Ministry of Environment (MOE) (2020003160004).
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Kang, YJ., Jo, HK., Jang, MH. et al. Acid treatment enhances performance of beads activated carbon for formaldehyde removal. Carbon Lett. 33, 397–408 (2023). https://doi.org/10.1007/s42823-022-00428-5
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DOI: https://doi.org/10.1007/s42823-022-00428-5