Harnessing Nanomaterials for Sustainable Water Purification

Abstract

Water pollution is a pressing threat to the world. Management deficiencies of industrial and domestic wastewater are directly linked to the escalating water pollution crisis. Timely and effective remedial actions need to be innovated. This study investigates the application of nanomaterials, particularly nano-oxides (TiO₂, ZnO, Fe₃O₄) and carbon-based nanomaterials (GO, CNTs), in water purification. Nano-oxides exhibit strong photocatalytic activity and adsorption capabilities, facilitating the degradation of organic pollutants and heavy metal removal. Carbon-based nanomaterials, with their high surface area and functionalized structures, provide enhanced adsorption efficiency and improved selectivity toward diverse contaminants. This study systematically evaluates the interaction mechanisms, material modifications, and performance optimization strategies for nanomaterials in water treatment. Findings indicate that surface modifications, such as heteroatom doping and nanocomposite integration, significantly enhance their catalytic activity, pollutant selectivity, and long-term stability. However, practical challenges including potential environmental risks, cost constraints, and large-scale implementation issues continue to be. Prospective research should first guarantee commercial feasibility and sustainability in application practicality when focusing on eco-friendly material recovery strategies, scalable synthesis methods, and hybrid nanostructures.