ABSTRACT The growth of industry in recent years has led to a gradual increase in concerns about heavy metal poisoning in water and soil, which, if ignored, might seriously endanger human health. Although copper (Cu) is a naturally occurring element that is widely distributed, exposure to high concentrations can have harmful effects on the body due to bioaccumulation and toxicity. With the help of biochar, an adsorbent made from the Roystonea Regia plant, batch adsorption experiments were utilized in this study to remove copper from aqueous solutions. Bentonite clay modifies the adsorbent̕s surface to boost its reactivity, For Cu the percentage removal efficiency was 72.62%. The equilibrium isotherms were defined by analyzing the experimental data with the help of Thomson model and Yoon Nelson. To ascertain the elemental composition and surface modification of the produced biochars, the surface area was assessed using SEM, EDAX and FTIR techniques both before and after the adsorption. The results of the study demonstrated that surface-modified biochar produced by Roystonea Regia performed effectively as an adsorbent to eliminate Cu2+ ions from effluent. soil which ignored health (Cu distributed toxicity plant solutions adsorbents s reactivity 7262 72 62 72.62% Nelson biochars SEM surfacemodified modified Cu2 effluent 726 7 6 72.62 72.6 72.