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ABSTRACT
Cost-effective adsorbents with little chance of negative effects are now in high demand from the market. While many studies have predominantly used the seeds, pods, and leaves of the Moringa plant as adsorbents, this work adopts a different strategy by using Moringa bark that has undergone chemical modification. In this study, we examined the adsorption capacity of Moringa bark using a batch method on wastewater containing 25mg/L of copper (Cu) and 25mg/L of nickel (Ni). The results were impressive, with a high adsorption capacity for copper (94.5% removal) and nickel (93.6% removal) achieved at a dosage of 0.8 g/L of the adsorbent and contact times of 90 minutes for copper and 120 minutes for nickel with a pH of 7. Both the Langmuir and Freundlich isotherms were used to comprehend the adsorbent's equilibrium behaviour. However, the experimental data was most encouraging with Langmuir isotherm with R-square values for copper and nickel of 0.865 and 0.7861, respectively.
