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Microplastic accumulation in sewer sediments and its potential entering the environment via combined sewer overflows: a study case in Paris

Environmental Science and Pollution Research 2024 14 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 60 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

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Thomas Gillet, Sam Azimi, Vincent Rocher, Ngọc Nam Phương, Minh Trang Nguyen, Thomas Gillet, Thomas Gillet, Thomas Gillet, Bruno Tassin Rachid Dris, Bruno Tassin Bruno Tassin Rachid Dris, Mohamed Saad, Bruno Tassin Rachid Dris, Bruno Tassin Bruno Tassin Johnny Gaspéri, Bruno Tassin Bruno Tassin Bruno Tassin Bruno Tassin Johnny Gaspéri, Vincent Rocher, Vincent Rocher, Johnny Gaspéri, Bruno Tassin Bruno Tassin Johnny Gaspéri, Bruno Tassin Vincent Rocher, Vincent Rocher, Rachid Dris, Sam Azimi, Bruno Tassin Sabrina Guérin-Rechdaoui, Bruno Tassin Bruno Tassin Sabrina Guérin-Rechdaoui, Rachid Dris, Johnny Gaspéri, Bruno Tassin Johnny Gaspéri, Johnny Gaspéri, Johnny Gaspéri, Johnny Gaspéri, Johnny Gaspéri, Johnny Gaspéri, Johnny Gaspéri, Johnny Gaspéri, Johnny Gaspéri, Johnny Gaspéri, Bruno Tassin Bruno Tassin Johnny Gaspéri, Johnny Gaspéri, Bruno Tassin Rachid Dris, Ngọc Nam Phương, Rachid Dris, Bruno Tassin Rachid Dris, Rachid Dris, Rachid Dris, Thomas Gillet, Sabrina Guérin-Rechdaoui, Sam Azimi, Sam Azimi, Sam Azimi, Sam Azimi, Bruno Tassin Vincent Rocher, Bruno Tassin Bruno Tassin Bruno Tassin Bruno Tassin Rachid Dris, Thomas Gillet, Rachid Dris, Ngọc Nam Phương, Johnny Gaspéri, Johnny Gaspéri, Johnny Gaspéri, Bruno Tassin Johnny Gaspéri, Vincent Rocher, Bruno Tassin Bruno Tassin Johnny Gaspéri, Johnny Gaspéri, Bruno Tassin Bruno Tassin Johnny Gaspéri, Bruno Tassin Bruno Tassin Rachid Dris, Ngọc Nam Phương, Johnny Gaspéri, Rachid Dris, Bruno Tassin Bruno Tassin Bruno Tassin Ngọc Nam Phương, Johnny Gaspéri, Johnny Gaspéri, Bruno Tassin Vincent Rocher, Bruno Tassin Johnny Gaspéri, Johnny Gaspéri, Johnny Gaspéri, Johnny Gaspéri, Johnny Gaspéri, Johnny Gaspéri, Johnny Gaspéri, Sam Azimi, Sam Azimi, Johnny Gaspéri, Johnny Gaspéri, Bruno Tassin Bruno Tassin Johnny Gaspéri, Bruno Tassin Johnny Gaspéri, Bruno Tassin Bruno Tassin Bruno Tassin Rachid Dris, Rachid Dris, Bruno Tassin Bruno Tassin Bruno Tassin Bruno Tassin Bruno Tassin Vincent Rocher, Vincent Rocher, Johnny 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Summary

Researchers measured microplastic levels in sewer sediments in Paris and found extremely high concentrations, similar in composition to raw wastewater. During heavy rain events, these contaminated sediments get flushed into rivers through sewer overflows, releasing large amounts of microplastics into the environment. The study reveals that urban sewer systems are a significant hidden reservoir of microplastic pollution that can rapidly contaminate waterways used for recreation and drinking water.

Polymers

PE PP

Study Type Environmental

During wet weather events, combined sewer overflows (CSOs) transfer large amount of particulate matter and associated pollutants into surrounding water bodies, thereby deteriorating the recipients' ecological health. Resuspension of sewer sediments during these events contributes significantly to pollution level of these discharges. However, how much this in-sewer process contributes to CSOs' quality regarding microplastic (MP) pollution is little known. Therefore, an investigation on sewer deposits inside the Parisian combined sewer network was carried out. The study found high MP concentrations stored in this matrix, ranging from 5 × 10 to 178 × 10 particle/kg dry weight. Polymer composition is similar to what found in raw wastewater, containing a high proportion of polyethylene and polypropylene. Thus, the results indicated the persistence of MPs in sewer network during transport during dry weather periods to treatment facilities. Once resuspension of sewer deposits happens, MPs can be released into water flow and get discharged along with CSOs. This highlights another potential pathway of MPs into freshwater environment.

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