Ammonium is a positively charged ion composed of one nitrogen atom and four hydrogen atoms, with the chemical formula NH4+. In research, the focus on ammonium often revolves around its role in various environmental processes, such as nitrogen cycling in ecosystems, wastewater treatment, and agricultural practices. Researchers investigate the sources, transformations, and impacts of ammonium in natural systems, as well as methods for monitoring and controlling its levels. Understanding the behavior of ammonium is crucial for managing nutrient cycles, protecting water quality, and promoting sustainable practices in various sectors.