Heavy metals have become a significant source of water contamination due to their poisonous nature and difficulties in biodegrading. Banana peel was employed as a bioadsorbent in this study to remove heavy metals from contaminated water. The fundamental issue with banana peel bioadsorbent is that biomass-derived activated carbon has a far lower adsorption capacity than commercial activated carbon. Furthermore, a large amount of wasted banana peels complicates disposal. Thus, it is anticipated that the current effort will address banana peel disposal issues by converting banana peels into bioadsorbent. The goals of this project are to create a bioadsorbent from banana peels and test its efficacy in adsorbing heavy metals. Furthermore, we optimised the pH, solution temperature, adsorbent dose, contact time, and solid-liquid ratio to assess the bio-capacity adsorbent's to remove Ni. Due to their ease of processing, wide availability, and environmental friendliness, it is strongly suggested that affordable raw materials be used extensively as bioadsorbent in wastewater operations.