Production of low-cost adsorbent for toxic metal removal is a quest for many researchers. As such, adsorption technique using biomass feedstock has been a keen interest owing to its simple operational procedure and non-toxic nature. Thus, in this present study, teak wood waste was proposed as an absorbent to remove ferrous ions from aqueous solution. Based on the empirical estimation, experimental isotherm data was best-fitted by the Langmuir model, and the maximum adsorption uptake by the biochar was achieved at 4.52 mg g−1. The uptake of Fe(II) ions followed the pseudo-second-order kinetic model predominantly suggesting a chemisorption pathway, and a favourable uptake at higher temperature. The mechanistic interaction was also attributed to the weak Van der Waals interaction (physisorption) and diffusion through the pores based on the characteristic result.