Plastic pellets Archives - One Earth - One Ocean e. V. https://oneearth-oneocean.com/en/tag/plastic-pellets-en/ Eine weitere WordPress-Website Wed, 05 Jul 2023 05:57:22 +0000 en-US hourly 1 https://wordpress.org/?v=6.5.5 https://oneearth-oneocean.com/wp-content/uploads/2022/08/cropped-oeoo-logo-unterzeile-blau-1-32x32.jpg Plastic pellets Archives - One Earth - One Ocean e. V. https://oneearth-oneocean.com/en/tag/plastic-pellets-en/ 32 32 Observation of the degradation of three types of plastic pellets exposed to UV irradiation in three different environments https://oneearth-oneocean.com/en/international-marine-litter-database-en-en/2021/observation-of-the-degradation-of-three-types-of-plastic-pellets-exposed-to-uv-irradiation-in-three-different-environments/ Wed, 20 Jan 2021 18:10:52 +0000 https://oneearth-oneocean.com/2021/01/20/observation-of-the-degradation-of-three-types-of-plastic-pellets-exposed-to-uv-irradiation-in-three-different-environments/ Liqi Cai, Jundong Wang, Jinping Peng, Ziqing Wu, Xiangling Tan, Observation of the degradation of three types of plastic pellets exposed to UV irradiation in three different environments, Science of The Total Environment, Volumes 628–629, 2018, Pages 740-747, ISSN 0048-9697, Abstract: Plastic debris represents one of the most prevalent and persistent pollution problems in the marine environment. In particular, microplastics that are mainly degraded from larger plastic debris have become a growing environmental concern. However, studies on the degradation of plastics in the aquatic environment that hydrobios reside in have been limited, while several studies regarding the degradation of plastics have been conducted under outdoor or accelerated weathering conditions. Thus, observation of the degradation of three types of virgin plastic pellets exposed to UV irradiation in three different environments (i.e., simulated seawater, ultrapure water, and a waterless (air) condition) was carried out. Data on the changes in physical and chemical properties were collected. The FTIR spectra showed that hydroxyl groups and carbonyl groups developed in three types of weathered plastic pellets under the air and ultrapure water environmental conditions after 3months of UV irradiation, while only carbonyl groups were found in plastic pellets in the simulated seawater environment. In contrast, the Raman spectra showed no significant changes in the weathered plastic pellets, but there were different intensities of characteristic peaks after exposure to UV irradiation. In addition, SEM images illustrated that granular oxidation, cracks and flakes were common patterns during degradation, and the plastic pellets in the three different environments experienced different levels of chemical weathering. We suggest that further studies on the degradation processes of plastic debris are needed to predict the fate of plastic debris in the environment. https://drive.google.com/open?id=1R_1KbQbM1BtQYVFF8-_BFq_0qpdIJodT https://doi.org/10.1016/j.scitotenv.2018.02.079.(http://www.sciencedirect.com/science/article/pii/S0048969718304698)

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]]> Liqi Cai, Jundong Wang, Jinping Peng, Ziqing Wu, Xiangling Tan,

Observation of the degradation of three types of plastic pellets exposed to UV irradiation in three different environments,

Science of The Total Environment,
Volumes 628–629,
2018,
Pages 740-747,
ISSN 0048-9697,

Abstract:

Plastic debris represents one of the most prevalent and persistent pollution problems in the marine environment. In particular, microplastics that are mainly degraded from larger plastic debris have become a growing environmental concern.

However, studies on the degradation of plastics in the aquatic environment that hydrobios reside in have been limited, while several studies regarding the degradation of plastics have been conducted under outdoor or accelerated weathering conditions.
Thus, observation of the degradation of three types of virgin plastic pellets exposed to UV irradiation in three different environments (i.e., simulated seawater, ultrapure water, and a waterless (air) condition) was carried out. Data on the changes in physical and chemical properties were collected. The FTIR spectra showed that hydroxyl groups and carbonyl groups developed in three types of weathered plastic pellets under the air and ultrapure water
environmental conditions after 3months of UV irradiation, while only carbonyl groups were found in plastic pellets in the simulated seawater environment.
In contrast, the Raman spectra showed no significant changes in the weathered plastic pellets, but there were different intensities of characteristic peaks after exposure to UV irradiation. In addition, SEM images illustrated that granular oxidation, cracks and flakes were common patterns during degradation, and the plastic pellets
in the three different environments experienced different levels of chemical weathering. We suggest that further studies on the degradation processes of plastic debris are needed to predict the fate of plastic debris in the environment.

https://drive.google.com/open?id=1R_1KbQbM1BtQYVFF8-_BFq_0qpdIJodT
https://doi.org/10.1016/j.scitotenv.2018.02.079.(http://www.sciencedirect.com/science/article/pii/S0048969718304698)

The post Observation of the degradation of three types of plastic pellets exposed to UV irradiation in three different environments appeared first on One Earth - One Ocean e. V..

]]> Concentration and composition of polycyclic aromatic hydrocarbons (PAHs) in plastic pellets https://oneearth-oneocean.com/en/brazil-en/2014/concentration-and-composition-of-polycyclic-aromatic-hydrocarbons-pahs-in-plastic-pellets/ https://oneearth-oneocean.com/en/brazil-en/2014/concentration-and-composition-of-polycyclic-aromatic-hydrocarbons-pahs-in-plastic-pellets/#respond Tue, 21 Jan 2014 16:46:09 +0000 https://oneearth-oneocean.com/2014/01/21/concentration-and-composition-of-polycyclic-aromatic-hydrocarbons-pahs-in-plastic-pellets/ Mara Fisner, Satie Taniguchi, Alessandra P. Majer, Márcia C. Bícego, Alexander Turra, Concentration and composition of polycyclic aromatic hydrocarbons (PAHs) in plastic pellets: Implications for small-scale diagnostic and environmental monitoring, Marine Pollution Bulletin, Volume 76, Issues 1–2, 15 November 2013, Pages 349-354, ISSN 0025-326X, http://dx.doi.org/10.1016/j.marpolbul.2013.09.045. (http://www.sciencedirect.com/science/article/pii/S0025326X13005961) Abstract: Plastic pellets may serve as a carrier of toxic contaminants, including polycyclic aromatic hydrocarbons (PAHs). Considering that beach morphodynamics and pellet distribution varied along the shore, and that contaminant sources may vary on different scales, it is expected that this variability is reflected in the concentration and composition of contaminants. This hypothesis was tested through a sampling of plastic pellets at 30 sites along the shore in Santos Bay (Brazil). The total PAH concentrations and the priority PAHs showed high variability, with no clear pattern. Their composition differed among the sampling sites; some of the compounds represent a potential risk to organisms. The sources of contamination, as indicated by the isomer ratios, were also variable among sites. The high small-scale spatial variability found here has implications for estimating the plastic pellet contamination on beaches, since a sample from a single site is unlikely to be representative of an entire beach.

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]]> Mara Fisner, Satie Taniguchi, Alessandra P. Majer, Márcia C. Bícego, Alexander Turra, Concentration and composition of polycyclic aromatic hydrocarbons (PAHs) in plastic pellets: Implications for small-scale diagnostic and environmental monitoring, Marine Pollution Bulletin, Volume 76, Issues 1–2, 15 November 2013, Pages 349-354, ISSN 0025-326X, http://dx.doi.org/10.1016/j.marpolbul.2013.09.045. (http://www.sciencedirect.com/science/article/pii/S0025326X13005961) Abstract: Plastic pellets may serve as a carrier of toxic contaminants, including polycyclic aromatic hydrocarbons (PAHs). Considering that beach morphodynamics and pellet distribution varied along the shore, and that contaminant sources may vary on different scales, it is expected that this variability is reflected in the concentration and composition of contaminants. This hypothesis was tested through a sampling of plastic pellets at 30 sites along the shore in Santos Bay (Brazil). The total PAH concentrations and the priority PAHs showed high variability, with no clear pattern. Their composition differed among the sampling sites; some of the compounds represent a potential risk to organisms. The sources of contamination, as indicated by the isomer ratios, were also variable among sites. The high small-scale spatial variability found here has implications for estimating the plastic pellet contamination on beaches, since a sample from a single site is unlikely to be representative of an entire beach.

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