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Valorization of Biochar for Efficient Removal of Anionic Dyes From Wastewater: A Sustainable Approach to Environmental Depollution
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Author(s): Hammadi El Farissi (Chemical Engineering for Resources Valorization Group (UAE/L01FST), Faculty of Science and Technology, Abdelmalek Essaadi University, Tangier, Morocco)
Copyright: 2025
Pages: 20
Source title:
Green Chemistry, Sustainable Processes, and Technologies
Source Author(s)/Editor(s): Kamal Hirech (Mohammed First University, Morocco)and Mohamed El Massaoudi (Mohammed First University, Morocco)
DOI: 10.4018/979-8-3693-9826-5.ch002
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Abstract
This chapter presents an investigation into the valorization of biochar derived from the pyrolysis of Cistus seeds (BS) and shells (BSh) for the removal of AO-52 dye from aqueous solutions. The study explores the influence of factors such as pH, adsorbent dosage, initial dye concentration, and contact time on the adsorption efficiency of BS and BSh biochars. The authors applied various kinetic and isotherm models, including pseudo-first-order, pseudo-second-order, Freundlich, and Langmuir, to analyze the adsorption mechanisms. The results indicate that the adsorption process follows pseudo-second-order kinetics, with the Langmuir model best describing the isotherms. Maximum adsorption capacities of 500 mg g−1 and 358.47 mg g−1 were observed for BSh and BS, respectively. The findings highlight the potential of biochar from Cistus seeds and shells as an effective, sustainable material for dye removal in wastewater treatment, offering an eco-friendly solution for addressing water pollution in the textile industry.
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