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- W3033389993 abstract "To enhance the arsenic(V) adsorption capacity in the wide pH range, thermal chemical vapor deposition (tCVD) using aniline was conducted on various raw materials to prepare nitrogen-doped activated carbon samples. Phenol resin, polyacrylonitrile-based carbon fiber, cellulose-based activated carbon fiber, petroleum-derived beads-shaped activated carbon, and plant-based activated carbon powder were used as activated carbon precursors. We conducted the consecutive treatment (CVD) of steam activation as a pretreatment (8ST30), aniline tCVD (8ANL10), steam activation (8ST50), and heat treatment (9.5HT30). Steam activation was performed to improve tCVD efficiency and specific surface area. The annealing process at 950 °C was conducted to form quaternary nitrogen (N-Q) and reduce oxygen-containing acidic functional groups on the surface. The best result was obtained when we used cellulose-based activated carbon fiber as a precursor (KF-CVD). KF-CVD showed 0.172 mmol/g of the arsenic adsorption capacity, and it was at least 46% larger than that of all prepared samples. KF-CVD also indicated the highest adsorption capacity at any pH range. We assessed porous properties, elemental composition, nitrogen configuration by X-ray photoelectron spectroscopy, the number of surface functional groups by Boehm titration, and pHpzc of the prepared samples. Based on these surface characteristic studies; the increased specific surface area and the highest N-Q content of KF-CVD would enhance the arsenic adsorption in all pH ranges." @default.
- W3033389993 created "2020-06-12" @default.
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- W3033389993 date "2020-06-06" @default.
- W3033389993 modified "2023-10-01" @default.
- W3033389993 title "Investigating the effective carbon material for thermal chemical vapor deposition using aniline to enhance As(V) adsorption capacity of activated carbon" @default.
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- W3033389993 doi "https://doi.org/10.1007/s42452-020-2974-y" @default.
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