Bayram, O.Moral, E.Köksal, E.Göde, F.Pehlivan, E.2024-04-202024-04-2020232949-8392https://doi.org/10.1016/j.scenv.2023.100023https://hdl.handle.net/20.500.13091/5393The removal of hazardous dyes from water by magnetic biosorbents has received a lot of interest in recent studies. This is because they are inexpensive and simple to separate from the solution phase. In this study, nano-magnetic Tamarindus indica fruit seed biochar was combined with iron to create a green nano-magnetic/ biochar (BC) composite (nM-BC). Compared to unmodified biochar, modified biochar composite significantly improved the ability to adsorb methyl blue (MB) and malachite green (MG). The Dubinin-Radushkevich, Scathard, Freundlich, Langmuir, and Temkin models were used to analyze the adsorption equilibrium data, and the Langmuir isotherm (R2 =0.952–0.995) provided a good match to the results. Saturated BC adsorption capacities for MB and MG were 3.055 mg/g and 5.577 mg/g, respectively, while nM-BC values for MB and MG were 3.326 mg/g and 20.408 mg/g, respectively. The adsorption process is accurately described by the pseudo-second-order kinetic model. BC and nM-BC both passed four reusability tests. Utilizing FT-IR and SEM instruments BC and nM-BC were characterized. The study demonstrates that biochar can be enhanced with nano-iron which has a potent ability to remove dyes utilizing a green manufacturing approach. © 2023 The Authorseninfo:eu-repo/semantics/openAccessAdsorptionAnionic dyeCationic dyeIsothermsNano-magnetic biocharTamarindus indica fruit seedArticle10.1016/j.scenv.2023.1000232-s2.0-85172262979