DOI: https://doi.org/10.36347/sajb.2025.v13i01.009

Pages: 75-83

Water contamination is a worldwide problem which leads to many diseases in animals, plants and in humans. It is highly documented that anthropogenic and industrial action are the key sources of surface and ground water contamination all over the world. Various industries like leather, textile, smelting and alloying directly discharges into water bodies which potentially affect water quality. This study illustrates the synthesis and application of Ricinus communis biochar along with ZnO/CuO NPs for the sequestration of chromium from natural water. To remove the Cr contaminated water, adsorption method was used-the most recommended, inexpensive, low energy and less time-consuming method. Adsorption experiments were conducted in batches with varying contact periods, pH, adsorbent dosage, initial metal ion concentration, and temperature. Findings shows that by increasing temperature, dosage and time, the removal percentage of Cr increases in a pattern RCB/CuO NCs>RCB/ZnO NCs>RCB. When compared to earlier investigations, the proposed materials are more efficient and have a higher adsorption capacity. The use of nanoparticle composites for Cr cleanup at the industrial level has been suggested.