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Phosphorus contamination in water poses significant risks to water quality and environmental health, primarily contributing to the rapid growth of algae, known as algal blooms, which can lead to eutrophication and disrupt aquatic ecosystems. This study investigates the effectiveness of modified iron-coated hard clam shells (MICHCS) in removing phosphate from water. The research focuses on determining optimal conditions for maximum phosphate removal efficiency, specifically by evaluating factors such as flow rate, initial phosphate concentration, and bed depth in an up-flow column reactor. The preparation of the MICHCS involved several key steps, including cleaning, crushing, sieving, and iron coating the clam shells to enhance their adsorption properties. Following this, a phosphate solution was prepared and the up-flow column reactor was set up for testing. The Thomas model is employed to predict adsorption dynamics and breakthrough curves accurately. Based on preliminary findings, MICHCS is anticipated to demonstrate high phosphate removal efficiency, potentially achieving over 80% removal, making it a promising and sustainable solution for wastewater treatment and environmental protection.