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October 23, Stephanie Schnydrig. Topics: Wastewater Society. One of the most popular drugs in Central and Southern Europe is cocaine, according to the new European drugs report. For the first time, they have presented the data in the form of total typical daily doses depicted as pie charts on a map. This provides us with a very clear overview of what is going on: Drugs are consumed everywhere; but the preferred substance varies from place to place. The researchers detected, above all, traces of methamphetamine in the wastewater of Eastern Europe, while in North-Eastern Europe, the biggest drug consumption was of amphetamine and in Central and Southern Europe it was primarily cocaine. Since the project began, researchers have collected samples of wastewater from around 60 million people in cities in the catchment areas of a total of wastewater treatment plants. For the Swiss part of the project, the University of Lausanne and Eawag carried out the analyses and evaluations of the wastewater. He explains, among other things, why it is the biofilm in the sewer and not the wastewater that is significant. Video available until Spatio-temporal assessment of illicit drug use at large scale: evidence from 7 years of international wastewater monitoring. Doi: This site requires JavaScript to be enabled. Please enable it or switch to a modern browser. Original publication Spatio-temporal assessment of illicit drug use at large scale: evidence from 7 years of international wastewater monitoring. Share with others:. Activate Socialmedia Buttons.

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Wastewater-based epidemiology WBE applies advanced analytical methods to quantify drug residues in wastewater with the aim to estimate illicit drug use at the population level. Transformation processes during transport in sewers chemical and biological reactors and storage of wastewater samples before analysis are expected to change concentrations of different drugs to varying degrees. Ignoring transformation for drugs with low to medium stability will lead to an unknown degree of systematic under- or overestimation of drug use, which should be avoided. This review aims to summarize the current knowledge related to the stability of commonly investigated drugs and, furthermore, suggest a more effective approach to future experiments. From over WBE studies, around 50 mentioned the importance of stability and 24 included tests in wastewater. Most focused on in-sample stability i. While consistent results were reported for rather stable compounds e. Wastewater composition can vary considerably over time, and different conditions prevail in different sewer systems. In summary, this indicates that more systematic studies are needed to: i cover the range of possible conditions in sewers and ii compare results more objectively. To facilitate the latter, we propose a set of parameters that should be reported for in-sewer stability experiments. Finally, a best practice of sample collection, preservation, and preparation before analysis is suggested in order to minimize transformation during these steps. Keywords: Biodegradation; Psychoactive substances; Sample preservation; Sewage epidemiology; Transformation. Abstract Wastewater-based epidemiology WBE applies advanced analytical methods to quantify drug residues in wastewater with the aim to estimate illicit drug use at the population level. Publication types Research Support, Non-U. Gov't Review.

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