In this work, the evaluation of low-cost, abundantly available, efficient and eco-friendly bio-waste adsorbent (BWA) obtained from waste tea stem (sawdust tea wood) was presented as an alternative to the current expensive methods of removing Pyronin B (PyB) dye from aqueous solution. The effects of varied factors, amount of adsorbent, initial dye concentration, contact time, etc., were studied, and optimal experimental conditions were revealed. The Langmuir isotherm model gave a better conformity than the Freundlich model with 3.85 mg/g as maximum adsorption capacity at 25 A degrees C. In addition, structural and morphological characterization of BWA was confirmed by FTIR, SEM study. It was found that the Lagergren's model could be used for the estimation of the system's kinetics. The present investigation and comparison with other reported adsorbents concluded that BWA may be applied as an attractive low-cost option for removal of PyB from aqueous solution.