Contaminant removal is a research area that focuses on developing and implementing various methods to remove contaminants from air, water, soil, and other environmental media. This field often involves studying the behavior and fate of contaminants in the environment, as well as evaluating the effectiveness of different remediation techniques such as chemical treatments, filtration, adsorption, and phytoremediation. The goal of contaminant removal research is to protect human health and the environment by reducing the presence of harmful substances in natural systems.