Title
A green approach for dye decontamination: activated carbon from hemp waste
Authors
HARUN KAYA

Received November 19, 2024
Published Volume 59 Issue 3-4 March-April
Keywords activated carbon, adsorption, hemp, dye, sustainability, water treatment

Abstract
In this research, activated carbon was derived from hemp waste using a chemical activation technique, and methylene blue adsorption was tested. Hemp wastes were first carbonized at 500 °C, mixed at a 1:3 biochar/KOH ratio by mass, and activated at 800 °C. The equilibrium data's suitability to the Langmuir, Freundlich, and Harkin-Jura isotherms was investigated, and it was identified as compatible with the Langmuir isotherm. The maximum adsorption capacity (qm) was determined as 400.25 mg/g. Adsorption kinetics were analyzed with intraparticle diffusion, pseudo-first and pseudo second models, and determined to fit the pseudo-second-order kinetic model (R2 = 0.9934). Since this method is inexpensive, it can be used effectively for eliminating methylene blue. From the results of the study, it is concluded that activated carbon from hemp waste is of strategic importance for environmental sustainability and water quality management.