Investigation of the Ni(II) adsorption isotherm onto biochar derived from cassava stem

https://doi.org/10.62239/jca.2025.059

Abstract

In this study, biochar was synthesized from Cassava stem via a pyrolysis at 700 ^oC within 60 minutes. This biochar was used as an adsorbent to remove Ni(II) from an aqueous solution. Effects of pH, adsorption time, and initial concentration of Ni were investigated. Results showed that the adsorption of Ni(II) onto biochar derived from Cassava stem obtained the maximum at pH = 8 and adsorption time = 1080 min with maximum adsorption capacity calculated from Langmuir of 31.77 mg/g. Isotherm and kinetic studies indicated that the Sips model gave the best fit with experimental data. This study shows the potential application of Cassava stem biochar on the treatment of polluted Ni(II) wastewater.