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Globally, around 80% of municipal (domestic and commercial) as well as industrial wastewater are discharged into the environment without undergoing any preliminary treatment. This increases the global concern of water pollution, as it does not only cause adverse effects on the ecosystems, but also affect human health. It has been reported that around 1.3 trillion gallons of water is used each year by the textile industry to dye clothing materials, indicating that one-fifth of water pollution comes from textile dyes. One potential solution to remediate wastewater is the utilization of waste-derived activated carbon. In this project, waste-derived activated carbon was modified with lemon juice to further enhance its adsorption efficiency.