Desorption Archives - One Earth - One Ocean e. V. https://oneearth-oneocean.com/tag/desorption/ Wed, 05 Jul 2023 05:57:40 +0000 de-DE 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 Desorption Archives - One Earth - One Ocean e. V. https://oneearth-oneocean.com/tag/desorption/ 32 32 Potential transfer of organic pollutants from littoral plastics debris to the marine environment https://oneearth-oneocean.com/international-marine-litter-database-en/2021/potential-transfer-of-organic-pollutants-from-littoral-plastics-debris-to-the-marine-environment/ Wed, 20 Jan 2021 17:10:12 +0000 https://oneearth-oneocean.com/?p=9067 Víctor M. León, Inés García, Emilia González, Raquel Samper, Verónica Fernández-González, Soledad Muniategui-Lorenzo, Potential transfer of organic pollutants from littoral plastics debris to the marine environment, Environmental Pollution, Volume 236, May 2018, Pages Abstract: Plastic polymers act as passive samplers in air system and concentrate hydrophobic organic contaminants by sorption or specific interactions, which can be transported to other systems such as the marine environment. In this study plastic debris was sampled in the surrounding area of a Mediterranean lagoon in order to determine the concentration of persistent and emerging organic contaminants. More specifically, desorption of 91 regulated and emerging organic contaminants (polycyclic aromatic hydrocarbons, polychlorinated biphenyls, organochlorinated pesticides, current-use pesticides, personal care products, other pesticides and plastic additives) was characterized for the first 24 h from different polymers to seawater and the remaining content of these contaminants was also extracted by ultrasonic extraction with methanol. All samples were analyzed by Stir Bar Sorptive Extraction coupled to GC/MS. A significant fraction of sorbed contaminants in polymers was desorbed in the first 24 h, particularly for triazines and organophosphorus pesticides due to their lower hydrophobicity than other considered analytes. The remaining contaminants contained in plastics can be also transferred to seawater, sediments or biota. Considering 24 h desorbed fraction plus the remaining methanol extracted fraction, the highest transfer levels corresponded to personal care products, plastic additives, current-use pesticides and PAHs. This is the first study to show the relevance of the transport of organic contaminants on plastic debris from littoral areas to the marine environment. https://drive.google.com/open?id=1kHouESKwbBx628quWw3FW0kK290n7mqE 442-453, ISSN 0269-7491, https://doi.org/10.1016/j.envpol.2018.01.114. (https://www.sciencedirect.com/science/article/pii/S0269749117348698)

The post Potential transfer of organic pollutants from littoral plastics debris to the marine environment appeared first on One Earth - One Ocean e. V..

]]> Víctor M. León, Inés García, Emilia González, Raquel Samper, Verónica Fernández-González,
Soledad Muniategui-Lorenzo,
Potential transfer of organic pollutants from littoral plastics debris to the marine environment,

Environmental Pollution, Volume 236, May 2018, Pages

Abstract:

Plastic polymers act as passive samplers in air system and concentrate hydrophobic organic contaminants by sorption or specific interactions, which can be transported to other systems such as the marine environment.
In this study plastic debris was sampled in the surrounding area of a Mediterranean lagoon in order to determine the concentration of persistent and emerging organic contaminants.
More specifically, desorption of 91 regulated and emerging organic contaminants (polycyclic aromatic hydrocarbons, polychlorinated biphenyls, organochlorinated pesticides, current-use pesticides, personal care products, other
pesticides and plastic additives) was characterized for the first 24 h from different polymers to seawater and the remaining content of these contaminants was also extracted by ultrasonic extraction with methanol.

All samples were analyzed by Stir Bar Sorptive Extraction coupled to GC/MS. A significant fraction of sorbed contaminants in polymers was desorbed in the first 24 h, particularly for triazines and organophosphorus pesticides due to their lower hydrophobicity than other considered analytes.
The remaining contaminants contained in plastics can be also transferred to seawater, sediments or biota. Considering 24 h desorbed fraction plus the remaining methanol extracted fraction, the highest transfer levels corresponded to personal care products, plastic additives, current-use pesticides and PAHs. This is the first
study to show the relevance of the transport of organic contaminants on plastic debris from littoral areas to the marine environment.

https://drive.google.com/open?id=1kHouESKwbBx628quWw3FW0kK290n7mqE
442-453, ISSN 0269-7491, https://doi.org/10.1016/j.envpol.2018.01.114.
(https://www.sciencedirect.com/science/article/pii/S0269749117348698)

The post Potential transfer of organic pollutants from littoral plastics debris to the marine environment appeared first on One Earth - One Ocean e. V..

]]> Enhanced desorption of persistent organic pollutants from microplastics under simulated physiological conditions https://oneearth-oneocean.com/objekt-der-untersuchung-organisch-object-of-research-organic/2013/enhanced-desorption-of-persistent-organic-pollutants-from-microplastics-under-simulated-physiological-conditions/ https://oneearth-oneocean.com/objekt-der-untersuchung-organisch-object-of-research-organic/2013/enhanced-desorption-of-persistent-organic-pollutants-from-microplastics-under-simulated-physiological-conditions/#respond Sun, 29 Dec 2013 11:18:19 +0000 http://www.oneearth-oneocean.com/kb/?p=137 Adil Bakir, Steven J. Rowland, Richard C. Thompson, Enhanced desorption of persistent organic pollutants from microplastics under simulated physiological conditions, Environmental Pollution, Volume 185, February 2014, Pages 16-23, ISSN 0269-7491, http://dx.doi.org/10.1016/j.envpol.2013.10.007. (http://www.sciencedirect.com/science/article/pii/S0269749113005277) Abstract: Microplastics have the potential to uptake and release persistent organic pollutants (POPs); however, subsequent transfer to marine organisms is poorly understood. Some models estimating transfer of sorbed contaminants to organisms neglect the role of gut surfactants under differing physiological conditions in the gut (varying pH and temperature), examined here. We investigated the potential for polyvinylchloride (PVC) and polyethylene (PE) to sorb and desorb 14C-DDT, 14C-phenanthrene (Phe), 14C-perfluorooctanoic acid (PFOA) and 14C-di-2-ethylhexyl phthalate (DEHP). Desorption rates of POPs were quantified in seawater and under simulated gut conditions. Influence of pH and temperature was examined in order to represent cold and warm blooded organisms. Desorption rates were faster with gut surfactant, with a further substantial increase under conditions simulating warm blooded organisms. Desorption under gut conditions could be up to 30 times greater than in seawater alone. Of the POP/plastic combinations examined Phe with PE gave the highest potential for transport to organisms.

The post Enhanced desorption of persistent organic pollutants from microplastics under simulated physiological conditions appeared first on One Earth - One Ocean e. V..

]]> Adil Bakir, Steven J. Rowland, Richard C. Thompson, Enhanced desorption of persistent organic pollutants from microplastics under simulated physiological conditions, Environmental Pollution, Volume 185, February 2014, Pages 16-23, ISSN 0269-7491, http://dx.doi.org/10.1016/j.envpol.2013.10.007. (http://www.sciencedirect.com/science/article/pii/S0269749113005277) Abstract: Microplastics have the potential to uptake and release persistent organic pollutants (POPs); however, subsequent transfer to marine organisms is poorly understood. Some models estimating transfer of sorbed contaminants to organisms neglect the role of gut surfactants under differing physiological conditions in the gut (varying pH and temperature), examined here. We investigated the potential for polyvinylchloride (PVC) and polyethylene (PE) to sorb and desorb 14C-DDT, 14C-phenanthrene (Phe), 14C-perfluorooctanoic acid (PFOA) and 14C-di-2-ethylhexyl phthalate (DEHP). Desorption rates of POPs were quantified in seawater and under simulated gut conditions. Influence of pH and temperature was examined in order to represent cold and warm blooded organisms. Desorption rates were faster with gut surfactant, with a further substantial increase under conditions simulating warm blooded organisms. Desorption under gut conditions could be up to 30 times greater than in seawater alone. Of the POP/plastic combinations examined Phe with PE gave the highest potential for transport to organisms.

The post Enhanced desorption of persistent organic pollutants from microplastics under simulated physiological conditions appeared first on One Earth - One Ocean e. V..

]]> https://oneearth-oneocean.com/objekt-der-untersuchung-organisch-object-of-research-organic/2013/enhanced-desorption-of-persistent-organic-pollutants-from-microplastics-under-simulated-physiological-conditions/feed/ 0