Microplastics: Sources and distribution in surface waters and sediments of Todos Santos Bay, Mexico

Ramírez-Álvarez, Nancy; Mendoza, Lorena M. Rios; Macías-Zamora, José Vinicio; Oregel-Vázquez, Lucero; Alvarez-Aguilar, Arturo; Hernández-Guzmán, Félix Augusto; Sánchez-Osorio, José Luis; Moore, Charles J.; Silva-Jiménez, Hortencia; Navarro-Olache, Luis Felipe

doi:10.1016/j.scitotenv.2019.134838

Cited by 81 publications

(13 citation statements)

References 39 publications

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“…In general trends, our results agree with the main classes of polymers identified in marine MPLs in other studies in the Mediterranean Sea, in which the most commonly found polymers were PE, PP, PS, PET, PVC, and PA (Gajšt et al, 2016;Munari et al, 2017;de Haan et al, 2019;Llorca et al, 2020b), and also in other regions (Cincinelli et al, 2017;Li et al, 2020;Ramírez-Álvarez et al, 2020). However, PE is the dominant compound in most of these studies, while the polymer found at much higher concentrations in the present work was PP.…”

Section: Resultssupporting

confidence: 92%

Screening and Quantification of Micro(Nano)Plastics and Plastic Additives in the Seawater of Mar Menor Lagoon

et al. 2021

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In this work a suspect-screening approach was employed to assess the polymers and plastic additives of micro(nano)plastics (NPL/MPLs) of size ranges from the nm range to 20 μm present in seawater from the top 5 cm of the Mar Menor lagoon during two sampling campaigns (summer and winter), as well of other potentially adsorbed compounds onto the plastic particles surfaces and suspended material. The identification of NPL/MPLs has been based on characteristic Kendrick Mass Defect analysis for each polymer type in mass spectra. The applied methodology allowed to identify NPLs/MPLs of polystyrene (PS), polyethylene (PE), polyisoprene (PI), polybutadiene (PBD), polypropylene (PP), polyamides (PA), polyvinylchloride (PVC), n-isopropylacrylamide (PNIPAm), and polydimethylsiloxanes. In addition, PS, PE, PI, PBD, PP, PA, and PVC were confirmed with standards, and the equivalent concentrations were quantified. The results of this study showed that most frequently found compounds were PP, PE, PA and PNIPAm, while the compound found at higher concentrations was by far PP reaching the 9,303 ± 366 ng/mL in one of the samples. A total number of 135 chemical compounds were tentatively identified, 74 of them plastic additives and compounds used in the polymers manufacture or coming from the polymer’s decomposition. In relation to plastic additives, the more frequently tentatively identified compounds were plasticizers such as phthalates group; stabilizers such as antioxidants (e.g., distearyl 3,3′-thiodipropionate, 2,5-di-tert-butylhydroquinone), and UV filters as benzotriazoles. Several flame retardants of the group of phosphates were as well detected. The other compounds tentatively identified in the samples were pharmaceuticals, pesticides, food additives, flavors and natural products that were attached onto the plastic particles and particulate matter from surrounding waters. In regards to the seasonal variation, during the summer a major number of compounds were tentatively detected, while de concentrations of polymers were slightly higher in winter. The spatial distribution showed higher contamination in the southern part of the coastal lagoon.

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Section: Resultssupporting

confidence: 92%

Screening and Quantification of Micro(Nano)Plastics and Plastic Additives in the Seawater of Mar Menor Lagoon

et al. 2021

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“…High human activity has intensified the risk of microplastic pollution in bay areas (Mathalon and Hill, 2014). In addition, the hydrodynamics in the bay area are complex, and the abundance and distribution of microplastics are greatly affected by wind and tidal currents (Zheng et al, 2019;Ramírez-Álvarez et al, 2020). Laizhou Bay is a typical semi-enclosed inner sea and is one of the three major bays in the inner Bohai Sea (Zhang et al, 2012), making up 10% of the total sea area (Wang et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

A systems analysis of microplastic pollution in Laizhou Bay, China

Jiang

Zhao

Zhang

et al. 2020

Science of The Total Environment

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“…Most studies target marine ecosystems. Many of these studies show that microplastic (MP) concentrations vary widely: Tsang et al [8] quantified an average of 0.046 particles L −1 (p L −1 ) (min = 0.00032, max = 0.35642) at nine locations off the coast of Hong Kong in China and Ramíres-Álvarez et al [9] found concentrations ranging from 0.00001 to 0.0007 p L −1 on the northwest coast of Baja California, Mexico. However, MPs in freshwater are still poorly studied [10], although lotic ecosystems are the most common pathway for artificial polymers into the sea [11].…”

Section: Introductionmentioning

confidence: 99%

Microplastic Concentrations in Raw and Drinking Water in the Sinos River, Southern Brazil

Ferraz

Bauer

Valiati

et al. 2020

Water

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Microplastics are omnipresent in the atmosphere, terrestrial and aquatic ecosystems, food and beverages. They may cause risks to biodiversity and the human population. The present study aims to assess the concentrations of microplastics in raw and drinking water of the Sinos River in Southern Brazil. The water was collected at eight locations along the Sinos River and in eight residences supplied with treated river water. The samples were processed by dying plastic particles with Nile Red and counting by fluorescence microscopy. River water showed an average of 330.2 particles L−1 and treated water 105.8 particles L−1. Fibers were the most abundant particles shapes in the samples. Particle abundance in the raw water did not follow the urbanization gradient in the Sinos River basin. The exact pathways of microplastic particles remain unidentified, but the predominance of fibers suggests that untreated sewage from washing machines may be a principal source of contamination, particularly in the headwaters. The microplastic in the drinking water is an additional factor to be considered in conservation efforts aiming at improving water quality in the Sinos River basin.

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Microplastics: Sources and distribution in surface waters and sediments of Todos Santos Bay, Mexico

Cited by 81 publications

References 39 publications

Screening and Quantification of Micro(Nano)Plastics and Plastic Additives in the Seawater of Mar Menor Lagoon

Screening and Quantification of Micro(Nano)Plastics and Plastic Additives in the Seawater of Mar Menor Lagoon

A systems analysis of microplastic pollution in Laizhou Bay, China

Microplastic Concentrations in Raw and Drinking Water in the Sinos River, Southern Brazil

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