Surface-Engineered Nanopolymeric Materials for Enhanced Adsorption in Wastewater Systems

Surface-engineered nanopolymeric materials have emerged as a promising class of adsorbents for wastewater remediation due to their tunable surface chemistry, high surface area, and adaptability to various pollutants. This review provides a comprehensive overview of the fundamentals of nanopolymeric adsorbents, chemical and morphological surface engineering strategies, synthesis methods, adsorption mechanisms, and performance evaluation, including isotherms, kinetics, and thermodynamics. Applications in the removal of heavy metals, organic dyes, pharmaceuticals, and emerging contaminants are highlighted, along with integration into batch, column, and hybrid treatment systems. Challenges such as synthesis costs, scale-up limitations, potential nanotoxicity, and fouling are discussed. Finally, future perspectives focus on low-cost, bio-based nanopolymers, green surface engineering approaches, stimuli-responsive smart adsorbents, life-cycle assessments, and industrial-scale implementation. This review provides critical insights for researchers aiming to design sustainable, efficient, and versatile nanopolymeric adsorbents for advanced wastewater treatment.