Özet:

Continuously growing industrial areas cause environmental and water pollution. One of the causes of water pollutants is the dyestuffs released into the environment without being recovered. In this study, biochar and nanomagnetic biochar were obtained from silverberry seeds, and the obtained biochars were used to remove methyl blue, an anionic dye, from the aqueous medium. The effects of pH, initial methyl blue concentration, temperature, amount of adsorbent and time change on the adsorption process were investigated. The maximum adsorption capacity was found to be 55.249 mg/g for biochar (b-EA) and 66.225 mg/g for nanomagnetic biochar (mb-EA). When the adsorption isotherms were examined, it was seen that both adsorbents were more suitable for Langmuir adsorption isotherm (R2=0.963 for b-EA, R2=0.991 for mb-EA). According to the kinetic data, the adsorption rate for both adsorbents is pseudo-second-order. In addition, negative ΔG values indicate that the adsorption process occurs spontaneously and positive ΔH values endothermically.