Toxicity Assessment of Microconstituents in the Environment

Human and ecological health have been severely affected by manufactured or naturally occurring pollutants/contaminants found in the environment. Recent years have seen a rise in efforts to find out where and how pollutants such as pharmaceuticals and personal care products (PPCPs), persistent organic pollutants (POPs), steroids hormones, nanomaterials, cosmetic goods, and endocrine-disrupting chemicals (EDCs) enter the environment. The current status of these pollutants is seen as both harmful to human health and the environment. Nanoscience and nanotechnology are rapidly rising in importance in the scientific community's eyes worldwide. Toxic substances that originate from natural or semi-synthetic sources and those that result from their transformation or degradation in nature, such as metal nanoparticles (NPs) and microplastics (MPs), are emerging contaminants. Among these microconstituents (MCs), MPs gain major significance in the environment, especially water and wastewater environments. This review briefly describes the MPs in the aquatic environment; their fate, behavior, transportation, and toxicity assessment. The tests performed on toxicity of MPs in the aquatic environment are explained along with their limitations. Researchers, the public, and governments worldwide are becoming more aware of the long-term risks of plastic usage and the need to reduce its use and promote eco-friendly alternatives that degrade safely after disposal. No unique kinetics for removing MPs from wastewater treatment plant (WWTP) effluent samples have yet been discovered.