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Microplastics in municipal wastewater treatment plants: a case study of Denizli/Turkey

Frontiers of Environmental Science & Engineering 2023年第8期17卷 95-105页

作者： Pelin Koyuncuoğlu Gülbin Erden Environmental Engineering Department Engineering FacultyPamukkale UniversityKınıklıCampusDenizli 20160Turkey

Plastic particles smaller than 5 mm are *** are among the significant pollutants that recently attracted *** quantities of microplastics enter the sewage system daily and reach wastewater treatment plants(WWTPs).As a result,WWTPs are potential microplastic ***,they create a pathway for microplastics to reach aquatic environments with treated wastewater *** on microplastic characterization in WWTPs have gained momentum in *** study investigates the abundance,size,shape,color,polymer type,and removal efficiencies of microplastics in a municipal wastewater treatment plant(WWTP)in Denizli/*** results showed that the dominant microplastic shape in wastewater samples was fibers(41.78%–60.77%)in the 100–500μm(58.57%–80.07%)size *** of the microplastics were transparent-white(32.86%–58.93%).The dominant polymer types were polyethylene(54.05%)and polyethylene vinyl acetate(37.84%)in raw ***,the microplastic removal efficiencies of the Denizli Central WWTP as a whole and for individual treatment units were *** the microplastic pollution removal efficiency of the Denizli Central WWTP was over 95%,the microplastic concentration discharged daily into the receiving environment was considerably high(1.28×1010 MP/d).Thus,Denizli Central WWTP effluents result in a high volume of emissions in terms of microplastic pollution with a significant daily discharge to theÇürüksu Stream.

关键词： Microplastics Wastewater treatment plant Removal efficiency daily discharge

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Contribution of precursor compounds to the release of per-and polyfluoroalkyl substances(PFASs) from waste water treatment plants(WWTPs)

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Journal of Environmental Sciences 2017年第11期29卷 80-90页

作者： Ulrika Eriksson Peter Haglund Anna K?rrman Man-Technology-Environment (MTM) Research Centre School of Science and Technology ?rebro University Department of Chemistry Umea University

Per-and polyfluoroalkyl substances（PFASs） are ubiquitous in sludge and water from waste water treatment plants, as a result of their incorporation in everyday products and industrial processes. In this study, we measured several classes of persistent PFASs,precursors, transformation intermediates, and newly identified PFASs in influent and effluent sewage water and sludge from three municipal waste water treatment plants in Sweden, sampled in 2015. For sludge, samples from 2012 and 2014 were analyzed as *** of precursors in sludge exceeded those of perfluoroalkyl acids and sulfonic acids（PFCAs and PFSAs）, in 2015 the sum of polyfluoroalkyl phosphoric acid esters（PAPs） were 15–20 ng/g dry weight, the sum of fluorotelomer sulfonic acids（FTSAs） was 0.8–1.3 ng/g,and the sum of perfluorooctane sulfonamides and ethanols ranged from non-detected to 3.2 ng/g. Persistent PFSAs and PFCAs were detected at 1.9–3.9 ng/g and 2.4–7.3 ng/g dry weight, respectively. The influence of precursor compounds was further demonstrated by an observed substantial increase for a majority of the persistent PFCAs and PFSAs in water after waste water treatment. Perfluorohexanoic acid（PFHxA）, perfluorooctanoic acid（PFOA）, perfluorohexane sulfonic acid（PFHxS）, and perfluorooctane sulfonic acid（PFOS）had a net mass increase in all WWTPs, with mean values of 83%, 28%, 37% and 58%,respectively. The load of precursors and intermediates in influent water and sludge combined with net mass increase support the hypothesis that degradation of precursor compounds is a significant contributor to PFAS contamination in the environment.

关键词： diPAPs FTSAs Waste water daily discharge PFCA precursor

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