_1718831815 1718831815 Hamid Shirkhanloo sahar.zi67@gmail.com Hamid Shirkhanloo Analytical Methods in Environmental Chemistry Journal AMECJournal 2645-5382 2645-5552 06 30 2024 7 02 10.24200/amecj.v7.i01 https://journal.amecj.com/index.php/AMECJ-01/issue/view/30 Mohamed Ennabely Abdessamad Ouedrhiri Youssef Lghazi Boubaker Youbi Abderrafie Kettani Halabi Mostafa Khoukhi Itto Bimaghra This study aims to valorize three agricultural-food (agri-food) wastes: Argan husks, dates seeds, and olive stones collected from various regions of Morocco to produce three types of activated carbons (ACah),(ACds) and (ACos) respectively. These activated carbons were used to compare their effectiveness in removing methyl orange, an organic pollutant in aqueous solutions. The precursor materials were carbonized at a temperature of T=900°C for 2 hours and subsequently chemically activated using phosphoric acid (H3PO4) in a weight ratio of 1:2. The obtained samples were characterized by Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and BET-analysis to determine the specific surface area. The analysis revealed that (ACah) displayed a rough surface with more pores and O-H chemical bonds, indicating its superior adsorption properties. This finding corresponds to the BET-specific surface areas obtained, which were 476 m²g-1 for ACah, 441 m²g-1 for ACds, and 362 m²g-1 for ACos. In all methyl orange adsorption experiments (10 mg L-1), 60 mg of each activated carbon was used for 30 minutes, resulting in removal efficiencies of 93.87% for ACah, 91.83% for ACds, and 89.79% for ACos. The examination of adsorption kinetics and isotherm analysis demonstrated a strong alignment of the adsorption data by Langmuir models. 06 29 2024 59 73 http://creativecommons.org/licenses/by/4.0 10.24200/amecj.v7.i02.310 https://journal.amecj.com/index.php/AMECJ-01/article/view/310 https://journal.amecj.com/index.php/AMECJ-01/article/download/310/576 https://journal.amecj.com/index.php/AMECJ-01/article/download/310/576