TY - JOUR

T1 - The Adsorption of 2,4-Dichlorobenzoic Acid on Carbon Nanofibers Produced by Catalytic Pyrolysis of Trichloroethylene and Acetonitrile

AU - Ozerova, Anna M.

AU - Tayban, Elena S.

AU - Lipatnikova, Inna L.

AU - Potylitsyna, Arina R.

AU - Bauman, Yury I.

AU - Prosvirin, Igor P.

AU - Shubin, Yury V.

AU - Vedyagin, Aleksey A.

AU - Mishakov, Ilya V.

AU - Netskina, Olga V.

N1 - This work was financially supported by the Russian Science Foundation (project No. 22-13-00406, https://rscf.ru/en/project/22-13-00406 accessed on 1 October 2023, BIC SB RAS). Публикация для корректировки.

PY - 2023/12

Y1 - 2023/12

N2 - In this study, carbon nanofibers were synthesized by the catalytic pyrolysis of trichloroethylene (CNF-Cl) and its mixture with acetonitrile (CNF-Cl-N). The addition of acetonitrile resulted in the incorporation of nitrogen in the CNF (0.33 at%), the removal of chlorine, an increase in oxygen-containing functional groups on the surface (from 1.6 to 3.6 at%), and an increase in the volume of mesopores (from 0.35 to 0.41 cm3·g−1) and macropores (from 0.115 to 0.393 cm3·g−1). The study of 2,4-DCBA adsorption on both CNFs revealed that the adsorption capacity showed dependence with a maximum on the 2,4-DCBA concentration in the solution, which was attributed to the electrostatic interactions of adsorbate with adsorbent at various pHs. The adsorption forces were effective over distances greater than the size of the 2,4-DCBA molecule, indicating volume pore filling. The maximum adsorption capacity occurred at 0.7–1.2 mM and a pH of 3.4 ± 0.1. CNF-Cl-N exhibited lower 2,4-DCBA adsorption than CNF-Cl-N due to its lower specific surface area, lower micropore volume, and higher concentration of oxygen-containing groups on the surface. However, these differences were not significant, suggesting that CNFs produced from both chlorine-containing wastes and their mixtures with nitrogen-containing compounds can be effectively used for water treatment to remove 2,4-DCBA.

AB - In this study, carbon nanofibers were synthesized by the catalytic pyrolysis of trichloroethylene (CNF-Cl) and its mixture with acetonitrile (CNF-Cl-N). The addition of acetonitrile resulted in the incorporation of nitrogen in the CNF (0.33 at%), the removal of chlorine, an increase in oxygen-containing functional groups on the surface (from 1.6 to 3.6 at%), and an increase in the volume of mesopores (from 0.35 to 0.41 cm3·g−1) and macropores (from 0.115 to 0.393 cm3·g−1). The study of 2,4-DCBA adsorption on both CNFs revealed that the adsorption capacity showed dependence with a maximum on the 2,4-DCBA concentration in the solution, which was attributed to the electrostatic interactions of adsorbate with adsorbent at various pHs. The adsorption forces were effective over distances greater than the size of the 2,4-DCBA molecule, indicating volume pore filling. The maximum adsorption capacity occurred at 0.7–1.2 mM and a pH of 3.4 ± 0.1. CNF-Cl-N exhibited lower 2,4-DCBA adsorption than CNF-Cl-N due to its lower specific surface area, lower micropore volume, and higher concentration of oxygen-containing groups on the surface. However, these differences were not significant, suggesting that CNFs produced from both chlorine-containing wastes and their mixtures with nitrogen-containing compounds can be effectively used for water treatment to remove 2,4-DCBA.

KW - 2,4-dichlorobenzoic acid

KW - adsorption

KW - carbon nanofibers

KW - chlorinated aromatic compounds

KW - trichloroethylene

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85180651060&origin=inward&txGid=5c516ef0ea8b3129fc4ad2b76a3fbb03

UR - https://www.mendeley.com/catalogue/4094ac7d-d097-3dd4-a3ad-63b9ed7829d2/

U2 - 10.3390/c9040098

DO - 10.3390/c9040098

M3 - Article

VL - 9

JO - C-Journal of Carbon Research

JF - C-Journal of Carbon Research

SN - 2311-5629

IS - 4

M1 - 98

ER -