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Microplastic in Danish wastewater: Sources, occurrences and fate
Summary
Researchers evaluated the role of Danish wastewater treatment plants in microplastic emissions by analyzing samples from 10 WWTPs, associated sludge, and farmland soils using FTIR imaging, identifying the amounts, polymer types, and potential sources of microplastics entering the environment.
The objectives of the present study were to evaluate the role of Danish wastewater treatment plants (WWTPs) in the emission of microplastic to the environment in terms of amounts and types of plastic polymers emitted and if possible, to evaluate which sources these plastic polymers could originate from. Samples from 10 WWTPs (wastewater, inlet and outlet), sludge from 5 of these plants, and 10 farmlands soils (5 soils that had received sludge as fertilizer and 5 that had not) were analysed for the occurrences of microplastic with the currently most advanced method available for microplastic investigations (Fourier Transformed Infrared Spectroscopy imaging applying a Focal Plane Array). This method allows both determination of the microplastic concentrations in the samples and identification of the type of plastic polymer of each microplastic particle.
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