This compilation of scientific work delves into innovative wastewater treatment technologies, focusing primarily on the development and optimization of novel catalysts for the effective removal of pollutants. Covering a range of catalysts, including precious metals and nanomaterials, the research offers new insights into cost-effective and efficient pollutant removal methods. Aimed at environmental scientists, engineers, and policymakers, this publication represents a significant contribution from top researchers in the field. It serves as a key resource for those looking to understand and apply the latest advancements in wastewater treatment.