{"id":27860,"date":"2021-06-21T18:50:22","date_gmt":"2021-06-21T16:50:22","guid":{"rendered":"https:\/\/oneearth-oneocean.com\/2021\/06\/21\/spatial-and-temporal-distribution-of-microplastics-in-water-and-sediments-of-a-freshwater-system-antua-river-portugal\/"},"modified":"2023-07-05T07:49:00","modified_gmt":"2023-07-05T05:49:00","slug":"spatial-and-temporal-distribution-of-microplastics-in-water-and-sediments-of-a-freshwater-system-antua-river-portugal","status":"publish","type":"post","link":"https:\/\/oneearth-oneocean.com\/en\/international-marine-litter-database-en-en\/2021\/spatial-and-temporal-distribution-of-microplastics-in-water-and-sediments-of-a-freshwater-system-antua-river-portugal\/","title":{"rendered":"Spatial and temporal distribution of microplastics in water and sediments of a freshwater system (Antu\u00e3 River, Portugal)"},"content":{"rendered":"

M.O. Rodrigues, N. Abrantes, F.J.M. Gon\u00e7alves, H. Nogueira, J.C. Marques, A.M.M. Gon\u00e7alves,<\/p>\n

Spatial and temporal distribution of microplastics in water and sediments of a freshwater system (Antu\u00e3
\nRiver, Portugal),<\/p>\n

Science of The Total Environment, Volume 633, 15
\nAugust 2018, Pages 1549-1559, ISSN 0048-9697,<\/p>\n

Abstract:<\/p>\n

Microplastics (particles with a size < 5 mm), one of the most emerging
\naquatic pollutants, are of particular concern since they can reach high
\ndensities and interact with biotic and abiotic environment. The
\noccurrence of microplastics in freshwater systems is less understood
\nthan in marine environment. Hence, the present study aims to provide new
\ninsights into microplastics abundances and distribution in Antu\u00e3 River
\n(Portugal) by applying the isolation method of wet peroxide oxidation
\nwith addition of zinc chloride to water and sediment samples collected
\nin March and October 2016, in three sampling sites. The abundance of
\nmicroplastics in water ranged from 5 to 8.3 mg m\u22123 or 58\u2013193 items m\u22123
\nin March and from 5.8\u201351.7 mg m\u22123 or 71\u20131265 items m\u22123 in October. In
\nsediments, the abundance ranged from 13.5\u201352.7 mg kg\u22121 or 100\u2013629 items
\nkg\u22121 in March and from 2.6\u201371.4 mg kg\u22121 or 18\u2013514 items kg\u22121 in October.
\nThe water and sediment samples with the greatest abundances were from
\nS\u00e3o Jo\u00e3o da Madeira and Aguincheira, respectively. Spatio-temporal
\ndistribution showed different pattern according to methodological
\napproaches, seasonal and hydrodynamic conditions and the proximity to
\nurban\/industry areas. Analysis of plastics by Fourier transform infrared
\nspectroscopy underline polyethylene and polypropylene as the most common
\npolymer types identified in this work. The low medium high oxidation
\nratio was 56:22:22 (%) in March and 61:31:8 (%) in October. Foams and
\nfibers were the most abundant type in S\u00e3o Jo\u00e3o da Madeira, while fibers
\nand fragments were the most abundant in Aguincheira and Estarreja in
\nwater and sediment samples, respectively. This study emphasizes the
\nimportance of rivers as carriage systems of microplastics. Further
\nstudies should be performed to identify point sources in order to
\nmitigate the microplastics contamination in aquatic systems.<\/p>\n

https:\/\/drive.google.com\/open?id=1nH49vUagp8VOyd9POU59LpI_a_WKpxsc<\/a>
\nhttps:\/\/doi.org\/10.1016\/j.scitotenv.2018.03.233.(https:\/\/www.sciencedirect.com\/science\/article\/pii\/S0048969718309926)<\/p>\n","protected":false},"excerpt":{"rendered":"

M.O. Rodrigues, N. Abrantes, F.J.M. Gon\u00e7alves, H. Nogueira, J.C. Marques, A.M.M. Gon\u00e7alves, Spatial and temporal distribution of microplastics in water and sediments of a freshwater system (Antu\u00e3 River, Portugal), Science of The Total Environment, Volume 633, 15 August 2018, Pages 1549-1559, ISSN 0048-9697, Abstract: Microplastics (particles with a size < 5 mm), one of the most emerging aquatic pollutants, are of particular concern since they can reach high densities and interact with biotic and abiotic environment. The occurrence of microplastics in freshwater systems is less understood than in marine environment. Hence, the present study aims to provide new insights into microplastics abundances and distribution in Antu\u00e3 River (Portugal) by applying the isolation method of wet peroxide oxidation with addition of zinc chloride to water and sediment samples collected in March and October 2016, in three sampling sites. The abundance of microplastics in water ranged from 5 to 8.3 mg m\u22123 or 58\u2013193 items m\u22123 in March and from 5.8\u201351.7 mg m\u22123 or 71\u20131265 items m\u22123 in October. In sediments, the abundance ranged from 13.5\u201352.7 mg kg\u22121 or 100\u2013629 items kg\u22121 in March and from 2.6\u201371.4 mg kg\u22121 or 18\u2013514 items kg\u22121 in October. The water and sediment samples with the greatest abundances were from S\u00e3o Jo\u00e3o da Madeira and Aguincheira, respectively. Spatio-temporal distribution showed different pattern according to methodological approaches, seasonal and hydrodynamic conditions and the proximity to urban\/industry areas. Analysis of plastics by Fourier transform infrared spectroscopy underline polyethylene and polypropylene as the most common polymer types identified in this work. The low medium high oxidation ratio was 56:22:22 (%) in March and 61:31:8 (%) in October. Foams and fibers were the most abundant type in S\u00e3o Jo\u00e3o da Madeira, while fibers and fragments were the most abundant in Aguincheira and Estarreja in water and sediment samples, respectively. This study emphasizes the importance of rivers as carriage systems of microplastics. Further studies should be performed to identify point sources in order to mitigate the microplastics contamination in aquatic systems. https:\/\/drive.google.com\/open?id=1nH49vUagp8VOyd9POU59LpI_a_WKpxsc https:\/\/doi.org\/10.1016\/j.scitotenv.2018.03.233.(https:\/\/www.sciencedirect.com\/science\/article\/pii\/S0048969718309926)<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2222],"tags":[1424,1425,1331,1351,1426],"yoast_head":"\nSpatial and temporal distribution of microplastics in water and sediments of a freshwater system (Antu\u00e3 River, Portugal) - One Earth - One Ocean e. V.<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/oneearth-oneocean.com\/en\/international-marine-litter-database-en-en\/2021\/spatial-and-temporal-distribution-of-microplastics-in-water-and-sediments-of-a-freshwater-system-antua-river-portugal\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Spatial and temporal distribution of microplastics in water and sediments of a freshwater system (Antu\u00e3 River, Portugal) - One Earth - One Ocean e. V.\" \/>\n<meta property=\"og:description\" content=\"M.O. Rodrigues, N. Abrantes, F.J.M. Gon\u00e7alves, H. Nogueira, J.C. Marques, A.M.M. Gon\u00e7alves, Spatial and temporal distribution of microplastics in water and sediments of a freshwater system (Antu\u00e3 River, Portugal), Science of The Total Environment, Volume 633, 15 August 2018, Pages 1549-1559, ISSN 0048-9697, Abstract: Microplastics (particles with a size < 5 mm), one of the most emerging aquatic pollutants, are of particular concern since they can reach high densities and interact with biotic and abiotic environment. The occurrence of microplastics in freshwater systems is less understood than in marine environment. Hence, the present study aims to provide new insights into microplastics abundances and distribution in Antu\u00e3 River (Portugal) by applying the isolation method of wet peroxide oxidation with addition of zinc chloride to water and sediment samples collected in March and October 2016, in three sampling sites. The abundance of microplastics in water ranged from 5 to 8.3 mg m\u22123 or 58\u2013193 items m\u22123 in March and from 5.8\u201351.7 mg m\u22123 or 71\u20131265 items m\u22123 in October. In sediments, the abundance ranged from 13.5\u201352.7 mg kg\u22121 or 100\u2013629 items kg\u22121 in March and from 2.6\u201371.4 mg kg\u22121 or 18\u2013514 items kg\u22121 in October. The water and sediment samples with the greatest abundances were from S\u00e3o Jo\u00e3o da Madeira and Aguincheira, respectively. Spatio-temporal distribution showed different pattern according to methodological approaches, seasonal and hydrodynamic conditions and the proximity to urban\/industry areas. Analysis of plastics by Fourier transform infrared spectroscopy underline polyethylene and polypropylene as the most common polymer types identified in this work. The low medium high oxidation ratio was 56:22:22 (%) in March and 61:31:8 (%) in October. Foams and fibers were the most abundant type in S\u00e3o Jo\u00e3o da Madeira, while fibers and fragments were the most abundant in Aguincheira and Estarreja in water and sediment samples, respectively. This study emphasizes the importance of rivers as carriage systems of microplastics. Further studies should be performed to identify point sources in order to mitigate the microplastics contamination in aquatic systems. https:\/\/drive.google.com\/open?id=1nH49vUagp8VOyd9POU59LpI_a_WKpxsc https:\/\/doi.org\/10.1016\/j.scitotenv.2018.03.233.(https:\/\/www.sciencedirect.com\/science\/article\/pii\/S0048969718309926)\" \/>\n<meta property=\"og:url\" content=\"https:\/\/oneearth-oneocean.com\/en\/international-marine-litter-database-en-en\/2021\/spatial-and-temporal-distribution-of-microplastics-in-water-and-sediments-of-a-freshwater-system-antua-river-portugal\/\" \/>\n<meta property=\"og:site_name\" content=\"One Earth - One Ocean e. 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Gon\u00e7alves, Spatial and temporal distribution of microplastics in water and sediments of a freshwater system (Antu\u00e3 River, Portugal), Science of The Total Environment, Volume 633, 15 August 2018, Pages 1549-1559, ISSN 0048-9697, Abstract: Microplastics (particles with a size < 5 mm), one of the most emerging aquatic pollutants, are of particular concern since they can reach high densities and interact with biotic and abiotic environment. The occurrence of microplastics in freshwater systems is less understood than in marine environment. Hence, the present study aims to provide new insights into microplastics abundances and distribution in Antu\u00e3 River (Portugal) by applying the isolation method of wet peroxide oxidation with addition of zinc chloride to water and sediment samples collected in March and October 2016, in three sampling sites. The abundance of microplastics in water ranged from 5 to 8.3 mg m\u22123 or 58\u2013193 items m\u22123 in March and from 5.8\u201351.7 mg m\u22123 or 71\u20131265 items m\u22123 in October. In sediments, the abundance ranged from 13.5\u201352.7 mg kg\u22121 or 100\u2013629 items kg\u22121 in March and from 2.6\u201371.4 mg kg\u22121 or 18\u2013514 items kg\u22121 in October. The water and sediment samples with the greatest abundances were from S\u00e3o Jo\u00e3o da Madeira and Aguincheira, respectively. Spatio-temporal distribution showed different pattern according to methodological approaches, seasonal and hydrodynamic conditions and the proximity to urban\/industry areas. Analysis of plastics by Fourier transform infrared spectroscopy underline polyethylene and polypropylene as the most common polymer types identified in this work. The low medium high oxidation ratio was 56:22:22 (%) in March and 61:31:8 (%) in October. 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