Micropollutants are substances that even at very low concentrations have adverse effects on different environmental matrices. They are an inhomogeneous group of anthroprogenic chemical compounds that is discharged by human to the environment. Commonly known micropollutants that might pose possible threats to ecological environments are, to name just a few: environmental persistent pharmaceutical pollutants and personal care products, pesticides, stimulants, persistent organic pollutants, and artificial sweeteners To date, most of the scientists have identified wastewater treatment plants
Micropollutants are substances that even at very low concentrations have adverse effects on different environmental matrices. They are an inhomogeneous group of anthroprogenic chemical compounds that is discharged by human to the environment. Commonly known micropollutants that might pose possible threats to ecological environments are, to name just a few: environmental persistent pharmaceutical pollutants and personal care products, pesticides, stimulants, persistent organic pollutants, and artificial sweeteners To date, most of the scientists have identified wastewater treatment plants as the main source of micropollutants to aquatic ecosystems and/or adversely affect the extraction of potable water from raw water. Due to in many places drinking water is also extracted from surface waters, or the substances also reach the groundwater via the water, they are also found in raw water and must be laboriously removed by drinking water treatment. In addition, some of the substances are bioaccumulative, which means that they accumulate in animals or plants and thus also in the human food chain.
== Background == right|thumb|(A) Detection frequencies of the 504 trace substances. Red line is detection frequency of 25%. (B) Maximum concentrations (cmax) of all compounds with cmax > 1 μg/L. (C) Detection frequencies of 96 compounds detected in more than 25% of the samples. The number next to each bar represents the mean concentration (cmed) in μg/L. (D) Maximum concentrations (cmax > 1 μg/L) of compounds detected in more than 25% of the samples. The number next to each bar represents the maximum concentration (cmax) in μg/L. Pesticides and biocides are shown in green, pharmaceuticals in blue and other chemicals in purple. It is estimated that there are currently around 235,000 individual chemical substances registered worldwide. A large number of these are released into wastewater by humans. If these are persistent, they remain during clarification in the wastewater and enter the environment. Some of them have ecotoxic relevant properties. In some cases, the chemical itself is not a concern, but its degradation products are.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).