@article{ART003341946},
author={Fathy Nady A. and SON, HO-JIN and El-Khouly Sahar M. and Mohamed Ghada M.},
title={Valorization of rice by-products for carbon nanostructures synthesis in dye wastewater remediation},
journal={Carbon Letters},
issn={1976-4251},
year={2026},
volume={36},
number={1},
pages={317-330},
doi={10.1007/s42823-025-01020-3}
TY - JOUR
AU - Fathy Nady A.
AU - SON, HO-JIN
AU - El-Khouly Sahar M.
AU - Mohamed Ghada M.
TI - Valorization of rice by-products for carbon nanostructures synthesis in dye wastewater remediation
JO - Carbon Letters
PY - 2026
VL - 36
IS - 1
PB - Korean Carbon Society
SP - 317
EP - 330
SN - 1976-4251
AB - A sustainable and cost-effective approach was developed for synthesizing carbon nanostructures namely carbon nanotubes (CNTs), carbon spheres (CSs), and carbon fibers (CFs). The process employed pyrolyzed hydrochar derived from treated rice straw, kaolin, zeolite or hydrochar as supports for Fe–Ni bimetallic catalysts, while hydrochar, camphor, or cotton fiber served as carbon sources. The resulting nanostructured materials were characterized using FE-SEM, XRD, FTIR, and N2 adsorption analyses. These tools demonstrated that morphology and structure of the carbon materials produced are governed by the carbon precursor, catalyst support, and catalyst-carbon interactions. The resultant carbon nanostructures have distinctive graphitic characteristics and surface functions that improve adsorption performance. The adsorption performance of the synthesized nanostructures was evaluated using methylene blue (MB) as a model pollutant. Among them, CNTs exhibited the highest adsorption capacity (~ 130 mg/g), which was attributed to its a large specific surface area and abundant π–π interaction sites. Adsorption behavior of MB dye followed the Langmuir isotherm and pseudo-second-order kinetic models, indicating monolayer chemisorption with multiple rate-controlling steps. This work highlights an efficient route for valorizing agricultural waste into functional carbon nanostructures for wastewater remediation.
KW - Rice straw hydrochar Ni–Fe catalysts Carbon nanostructures Adsorption modeling;methylene blue dye
DO - 10.1007/s42823-025-01020-3
ER -
Fathy Nady A., SON, HO-JIN, El-Khouly Sahar M. and Mohamed Ghada M.. (2026). Valorization of rice by-products for carbon nanostructures synthesis in dye wastewater remediation. Carbon Letters, 36(1), 317-330.
Fathy Nady A., SON, HO-JIN, El-Khouly Sahar M. and Mohamed Ghada M.. 2026, "Valorization of rice by-products for carbon nanostructures synthesis in dye wastewater remediation", Carbon Letters, vol.36, no.1 pp.317-330. Available from: doi:10.1007/s42823-025-01020-3
Fathy Nady A., SON, HO-JIN, El-Khouly Sahar M., Mohamed Ghada M. "Valorization of rice by-products for carbon nanostructures synthesis in dye wastewater remediation" Carbon Letters 36.1 pp.317-330 (2026) : 317.
Fathy Nady A., SON, HO-JIN, El-Khouly Sahar M., Mohamed Ghada M.. Valorization of rice by-products for carbon nanostructures synthesis in dye wastewater remediation. 2026; 36(1), 317-330. Available from: doi:10.1007/s42823-025-01020-3
Fathy Nady A., SON, HO-JIN, El-Khouly Sahar M. and Mohamed Ghada M.. "Valorization of rice by-products for carbon nanostructures synthesis in dye wastewater remediation" Carbon Letters 36, no.1 (2026) : 317-330.doi: 10.1007/s42823-025-01020-3
Fathy Nady A.; SON, HO-JIN; El-Khouly Sahar M.; Mohamed Ghada M.. Valorization of rice by-products for carbon nanostructures synthesis in dye wastewater remediation. Carbon Letters, 36(1), 317-330. doi: 10.1007/s42823-025-01020-3
Fathy Nady A.; SON, HO-JIN; El-Khouly Sahar M.; Mohamed Ghada M.. Valorization of rice by-products for carbon nanostructures synthesis in dye wastewater remediation. Carbon Letters. 2026; 36(1) 317-330. doi: 10.1007/s42823-025-01020-3
Fathy Nady A., SON, HO-JIN, El-Khouly Sahar M., Mohamed Ghada M.. Valorization of rice by-products for carbon nanostructures synthesis in dye wastewater remediation. 2026; 36(1), 317-330. Available from: doi:10.1007/s42823-025-01020-3
Fathy Nady A., SON, HO-JIN, El-Khouly Sahar M. and Mohamed Ghada M.. "Valorization of rice by-products for carbon nanostructures synthesis in dye wastewater remediation" Carbon Letters 36, no.1 (2026) : 317-330.doi: 10.1007/s42823-025-01020-3
