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@article{ART003342763},
author={Han Min Seong and Kwon Woong and Baek Youngbin and Jeong Eui gyung and Bai Byong Chol},
title={Effects of nitrogen functional groups and pore structure on high-affinity dye adsorption by plasma-treated activated carbon pellets},
journal={Carbon Letters},
issn={1976-4251},
year={2026},
volume={36},
number={2},
pages={1075-1083},
doi={10.1007/s42823-026-01069-8}

TY - JOUR
AU - Han Min Seong
AU - Kwon Woong
AU - Baek Youngbin
AU - Jeong Eui gyung
AU - Bai Byong Chol
TI - Effects of nitrogen functional groups and pore structure on high-affinity dye adsorption by plasma-treated activated carbon pellets
JO - Carbon Letters
PY - 2026
VL - 36
IS - 2
PB - Korean Carbon Society
SP - 1075
EP - 1083
SN - 1976-4251
AB - Expanding dye use elevates ecological risks by increasing dye-contaminated wastewater discharge. Cationic dyes resist removal owing to high stability and toxicity, but activated carbon adsorption remains an efficient and economical treatment. In this study, we examine methylene blue (MB) removal using activated carbon prepared from petroleum pitch through KOH activation, followed by nitrogen plasma treatment for 5, 10, 15, and 30 min. To characterize the surface chemistry and porosity of the nitrogen-functionalized carbon, we employed elemental analysis (EA), X-ray photoelectron spectroscopy (XPS), and N2 adsorption–desorption (Brunauer-Emmett-Teller, BET) measurements. Batch adsorption tests were conducted at MB concentrations of 100, 200, 300, 400, and 500 mg L⁻¹. The nitrogen plasma treatment increased the surface nitrogen content (from 0.44% to 1.94% depending on the treatment conditions) and enhanced MB adsorption performance. Equilibrium data were fitted using the Langmuir and Freundlich isotherm models; the Freundlich model showed a better correlation, indicating multilayer adsorption on a heterogeneous surface and suggesting that plasma-introduced nitrogen sites provided additional adsorption sites.
KW - Activated carbon pellets Nitrogen plasma Methylene blue Nitrogen functional group Freundlich isotherm
DO - 10.1007/s42823-026-01069-8
ER -

Han Min Seong, Kwon Woong, Baek Youngbin, Jeong Eui gyung and Bai Byong Chol. (2026). Effects of nitrogen functional groups and pore structure on high-affinity dye adsorption by plasma-treated activated carbon pellets. Carbon Letters, 36(2), 1075-1083.

Han Min Seong, Kwon Woong, Baek Youngbin, Jeong Eui gyung and Bai Byong Chol. 2026, "Effects of nitrogen functional groups and pore structure on high-affinity dye adsorption by plasma-treated activated carbon pellets", Carbon Letters, vol.36, no.2 pp.1075-1083. Available from: doi:10.1007/s42823-026-01069-8

Han Min Seong, Kwon Woong, Baek Youngbin, Jeong Eui gyung, Bai Byong Chol "Effects of nitrogen functional groups and pore structure on high-affinity dye adsorption by plasma-treated activated carbon pellets" Carbon Letters 36.2 pp.1075-1083 (2026) : 1075.

Han Min Seong, Kwon Woong, Baek Youngbin, Jeong Eui gyung, Bai Byong Chol. Effects of nitrogen functional groups and pore structure on high-affinity dye adsorption by plasma-treated activated carbon pellets. 2026; 36(2), 1075-1083. Available from: doi:10.1007/s42823-026-01069-8

Han Min Seong, Kwon Woong, Baek Youngbin, Jeong Eui gyung and Bai Byong Chol. "Effects of nitrogen functional groups and pore structure on high-affinity dye adsorption by plasma-treated activated carbon pellets" Carbon Letters 36, no.2 (2026) : 1075-1083.doi: 10.1007/s42823-026-01069-8

Han Min Seong; Kwon Woong; Baek Youngbin; Jeong Eui gyung; Bai Byong Chol. Effects of nitrogen functional groups and pore structure on high-affinity dye adsorption by plasma-treated activated carbon pellets. Carbon Letters, 36(2), 1075-1083. doi: 10.1007/s42823-026-01069-8

Han Min Seong; Kwon Woong; Baek Youngbin; Jeong Eui gyung; Bai Byong Chol. Effects of nitrogen functional groups and pore structure on high-affinity dye adsorption by plasma-treated activated carbon pellets. Carbon Letters. 2026; 36(2) 1075-1083. doi: 10.1007/s42823-026-01069-8

Han Min Seong, Kwon Woong, Baek Youngbin, Jeong Eui gyung, Bai Byong Chol. Effects of nitrogen functional groups and pore structure on high-affinity dye adsorption by plasma-treated activated carbon pellets. 2026; 36(2), 1075-1083. Available from: doi:10.1007/s42823-026-01069-8

Han Min Seong, Kwon Woong, Baek Youngbin, Jeong Eui gyung and Bai Byong Chol. "Effects of nitrogen functional groups and pore structure on high-affinity dye adsorption by plasma-treated activated carbon pellets" Carbon Letters 36, no.2 (2026) : 1075-1083.doi: 10.1007/s42823-026-01069-8