542 results match your criteria polyethylene mps

Assessing microplastic distribution within infaunal benthic communities in a coastal embayment.

Sci Total Environ 2021 Jun 5;791:148278. Epub 2021 Jun 5.

Marine and Freshwater Research Centre (MFRC), Galway-Mayo Institute of Technology (GMIT), Old Dublin Rd., Galway H91 T8NW, Ireland.

Marine anthropogenic litter is increasing in prevalence in both the marine environment and its inhabitants. This study assesses the levels of anthropogenic microplastics in benthic infauna from 20 subtidal stations in Galway Bay, Ireland. Microplastics were removed from the organisms using an alkaline digestion (KOH) and their synthetic origin was confirmed by μFTIR spectroscopic analysis. Read More

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Subchronic exposure to high-density polyethylene microplastics alone or in combination with chlortoluron significantly affected valve activity and daily growth of the Pacific oyster, Crassostrea gigas.

Aquat Toxicol 2021 May 30;237:105880. Epub 2021 May 30.

Université de Bordeaux, CNRS, EPOC, EPHE, UMR 5805, F-33600 Pessac, France.

Nowadays, pesticides and microplastics (MPs) are commonly found in coastal waters worldwide. Due to their widespread use, their persistence and toxicity, they may induce adverse effects on physiology and behaviour of marine organisms such as the Pacific oyster (Crassostrea gigas). This study explored the growth and valve activity of juvenile oysters exposed for 24 days to two frequently detected pollutants in the Pertuis Charentais (South West, France): a herbicide (chlortoluron, 85 µg. Read More

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The release inhibition of organic substances from microplastics in the presence of algal derived organic matters: Influence of the molecular weight-dependent inhibition heterogeneities.

Environ Res 2021 Jun 11:111424. Epub 2021 Jun 11.

School of Energy and Environment, Anhui University of Technology, Maanshan, 243002, China.

As the emerging contaminants, the behavior and fate of microplastics (MPs) were highly related to the interactions with surrounding organic matters. However, information on the effects of molecular sizes of organic matters on the interaction is still lacking. In this study, the bulk algal-derived organic matter (AOM) samples were obtained and further fractionated into high molecular weight (HMW-, 1kDa-0. Read More

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Occurrence and characterization of microplastics in white shrimp, Metapenaeus affinis, living in a habitat highly affected by anthropogenic pressures, northwest Persian Gulf.

Mar Pollut Bull 2021 Jun 7;169:112581. Epub 2021 Jun 7.

Shrimp Research Center, Iranian Fisheries Sciences Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Bushehr 75169-89177, Iran. Electronic address:

Microplastics (MPs) are a modern societal concern and recognized as a growing environmental hazard by careless disposal. This study aimed to assess the MPs content in white shrimp (Metapenaeus affinis) inhabiting in a natural habitat affected by high anthropogenic pressures, and recognize if the shrimp could be a suitable bioindicator for MPs pollution. To assess spatial changes of MPs presence in shrimps, sampling was carried out by a trawl net from 13 stations across the entire Musa Bay. Read More

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Spatial distribution of microplastics in sandy beach and inshore-offshore sediments of the southern Caspian Sea.

Mar Pollut Bull 2021 Jun 5;169:112578. Epub 2021 Jun 5.

Iranian National Institute for Oceanography and Atmospheric Science, Tehran 1411813389, Iran.

The occurrence of microplastics (MPs) in nearshore zones of the southern Caspian coasts is well documented; however, no data are available on MP occurrence in offshore sediments. In this study, six sandy beach stations and 18 inshore-offshore stations (six transects) were surveyed. MPs were detected in all sediment samples. Read More

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The occurrence and dietary intake related to the presence of microplastics in drinking water in Saudi Arabia.

Environ Monit Assess 2021 Jun 7;193(7):390. Epub 2021 Jun 7.

The Executive Department of Monitoring and Risk Assessment, Saudi Food and Drug Authority, Riyadh, Saudi Arabia.

The implications and health effects of microplastics (MPs) ingestion are still unclear, yet researchers and organizations around the world are increasingly examining the levels of microplastics and nanoplastics in the environment. This study investigated the presence and the quantity of microplastics in bottled and tap water from five regions in Saudi Arabia and estimated the dietary intake of microplastics. Thirty samples of drinking water were collected from the retail markets in Saudi Arabia. Read More

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Understanding the fragmentation of microplastics into nano-plastics and removal of nano/microplastics from wastewater using membrane, air flotation and nano-ferrofluid processes.

Chemosphere 2021 May 31;282:131053. Epub 2021 May 31.

School of Engineering, RMIT University, Melbourne, VIC, 3000, Australia.

Nano/microplastics (NPs/MPs), a tiny particle of plastic pollution, are known as one of the most important environmental threats to marine ecosystems. Wastewater treatment plants can act as entrance routes for NPs/MPs to the aquatic environment as they breakdown of larger fragments of the plastic component during the treatment process; therefore, it is necessary to remove NPs/MPs during the wastewater treatment process. In this study, understanding the effect of water shear force on the fragmentation of larger size MPs into smaller MPs and NPs and their removal by air flotation and nano-ferrofluid (i. Read More

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Photolysis of polycyclic aromatic hydrocarbons adsorbed on polyethylene microplastics.

Mar Pollut Bull 2021 Jun 2;169:112561. Epub 2021 Jun 2.

Research Institute of Environment, Agriculture and Fisheries, Osaka Prefecture, Habikino, Osaka 583-0862, Japan.

Contaminants adsorbed on microplastics (MPs) are a potential risk to aquatic environments. Several studies have demonstrated that polycyclic aromatic hydrocarbons (PAHs), which adsorb on MPs, can be photolyzed in aqueous solutions. We investigated photolysis of PAHs on MPs under sunlight conditions to estimate their environmental fate for the first time. Read More

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Suborganismal responses of the aquatic midge Chironomus riparius to polyethylene microplastics.

Sci Total Environ 2021 Aug 9;783:146981. Epub 2021 Apr 9.

Environmental Toxicology and Biology Group, Mathematical and Fluid Physics, Department, Sciences Faculty, UNED, Madrid, Spain.

Freshwater riverbeds are a major repository of microplastics (MPs) from inland activities. Benthic macroinvertebrates that live in close contact with sediments seem to ingest a considerable amount of such plastic particles. The effects of MPs on life-history traits are relatively well-known, but the suborganismal mechanisms underlying such effects remain unclear. Read More

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The joint toxicity of polyethylene microplastic and phenanthrene to wheat seedlings.

Chemosphere 2021 May 28;282:130967. Epub 2021 May 28.

College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, Jiangsu Province, 210095, PR China. Electronic address:

Due to wide distribution, easy production, and difficult degradation, microplastic pollution has become a new environmental problem that has attracted worldwide attention. However, there is little information about the effects of microplastics in soil and their combined pollution with other organic pollutants on crop growth. In this study, we conducted soil culture experiments to evaluate the effects of polyethylene microplastics (PE-MPs) (0. Read More

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Simultaneous sorption behaviors of UV filters on the virgin and aged micro-high-density polyethylene under environmental conditions.

Sci Total Environ 2021 May 24;789:147979. Epub 2021 May 24.

Department of Analytical and Inorganic Chemistry, Faculty of Chemistry, University of Bialystok, Ciolkowskiego 1K Street, 15-245 Bialystok, Poland.

The simultaneous sorption behaviors of four analytes from the UV filters group, benzophenone (BPh), 4-methylbenzylidene camphor (4MBC), benzophenone 3 (BPh3), and benzophenone 2 (BPh2) on virgin and aged high-density polyethylene (HDPE) with a particle size of 125 μm in milliQ and river water were examined in this study. The aging processes of HDPE particles were carried out with the use of simulated sunlight. Conducted research revealed that the sorption of UV filters on HDPE particles follows pseudo-second-order kinetics. Read More

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ExoProK: A Practical Method for the Isolation of Small Extracellular Vesicles from Pleural Effusions.

Methods Protoc 2021 May 11;4(2). Epub 2021 May 11.

Department of Biochemistry and Biotechnology, University of Thessaly, Viopolis, 415 00 Larissa, Greece.

Extracellular vesicles (EVs) are cell-secreted, lipid membrane-enclosed nanoparticles without functional nucleus. EV is a general term that includes various subtypes of particles named microvesicles, microparticles, ectosomes or exosomes. EVs transfer RNA, DNA and protein cargo between proximal and distant cells and tissues, thus constituting an organism-wide signal transduction network. Read More

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Are Honey Bees at Risk from Microplastics?

Toxics 2021 May 15;9(5). Epub 2021 May 15.

Toxicology Centre, University of Saskatchewan, Saskatoon, SK S7N 5B3, Canada.

Microplastics (MPs) are ubiquitous and persistent pollutants, and have been detected in a wide variety of media, from soils to aquatic systems. MPs, consisting primarily of polyethylene, polypropylene, and polyacrylamide polymers, have recently been found in 12% of samples of honey collected in Ecuador. Recently, MPs have also been identified in honey bees collected from apiaries in Copenhagen, Denmark, as well as nearby semiurban and rural areas. Read More

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Insights into the horizontal and vertical profiles of microplastics in a river emptying into the sea affected by intensive anthropogenic activities in Northern China.

Sci Total Environ 2021 Jul 19;779:146589. Epub 2021 Mar 19.

Key Laboratory for Earth Surface and Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China. Electronic address:

Studies focused only on surface water may underestimate microplastic abundance in aquatic environments. This was the first survey to investigate the vertical (surface, intermediate, and bottom waters) distribution and composition of microplastics (MPs) in the water columns and surface sediments collected from an urban seagoing river in northern China. Microplastic abundance in the water columns ranged from 5. Read More

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Microplastic pollution in inshore and offshore surface waters of the southern Caspian Sea.

Chemosphere 2021 May 18;281:130896. Epub 2021 May 18.

Department of Environmental Health Engineering, Faculty of Health and Health Sciences Research Center, Mazandaran University of Medical Sciences, Sari, Iran.

In this study, as the first comprehensive monitoring, the occurrence of microplastics (MPs) in inshore and offshore surface waters of the southern Caspian Sea was investigated. Our data indicated that MPs, which were detected in all the samples, were widely distributed in the thirteen studied stations. Non-normally distribution of the MPs was observed among the studied stations (p<0. Read More

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Microplastics aged in various environmental media exhibited strong sorption to heavy metals in seawater.

Mar Pollut Bull 2021 May 19;169:112480. Epub 2021 May 19.

College of Ecology and Environment, Hainan University, China; Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, China. Electronic address:

To date, the degradation of microplastics (MPs; <5 mm) in different environments, particularly their adsorption characteristics for coexisted metal pollutants remains to be elucidated. Thus, this study investigated the effects of aging MPs, including polyamide (mPA), polyethylene terephthalate (mPET), polystyrene (mPS), and polyvinyl chloride (mPVC) for 3 months under UVA irradiation in four environmental media (air, seawater, sand, and soil) and adsorption of heavy metals (Cu, Cd) onto seawater-aged mPS and mPVC. The results showed that surface morphological changes, including cracks, oxidized particles, and wrinkles, appeared on aged MPs. Read More

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Microplastics in different tissues of some commercially important fish species from Anzali Wetland in the Southwest Caspian Sea, Northern Iran.

Mar Pollut Bull 2021 May 19;169:112479. Epub 2021 May 19.

Department of Fisheries, Faculty of Natural Resources, University of Guilan, Sowmehsara, Iran.

The aim of this study was to investigate the occurrence of microplastics (MPs) in the gastrointestinal (GI) tract, muscle and gonads of 193 individuals of nine commercially-important fish species from Anzali Wetland between May and July 2018. Tissues were removed, digested by 10% KOH for 24 h at 60 °C, filtered on cellulose nitrate filter and then dried. MPs were found in all tissues. Read More

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Effects induced by polyethylene microplastics oral exposure on colon mucin release, inflammation, gut microflora composition and metabolism in mice.

Ecotoxicol Environ Saf 2021 May 18;220:112340. Epub 2021 May 18.

State Key Laboratory of Reproductive Medicine, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing 211166, China; Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, China. Electronic address:

Microplastics are plastic fragments widely distributed in the environment and accumulate in the organisms. However, the research on microplastics effects in mammals is limited. Polyethylene is the main kind of microplastics in the environment. Read More

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In situ effects of a microplastic mixture on the community structure of benthic macroinvertebrates in a freshwater pond.

Environ Toxicol Chem 2021 May 18. Epub 2021 May 18.

Department of Biology and Ecology, Faculty of Sciences and Mathematics, University of Niš, Niš, Serbia.

Benthic communities contain some of the most threatened organisms in aquatic habitats due to different anthropogenic pressures. The high abundance of microplastics (MPs) in sediments will continue to increase in the future, further increasing the probability of interactions between macroinvertebrates and MPs. In the present study, a benthic community in a relatively pristine shallow pond was exposed either to an environmentally relevant high concentration of an MP mixture of 80 g m in the sediment, or a control sediment, without the addition of MPs. Read More

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Combined Effects of Microplastics and Biochar on the Removal of Polycyclic Aromatic Hydrocarbons and Phthalate Esters and Its Potential Microbial Ecological Mechanism.

Front Microbiol 2021 30;12:647766. Epub 2021 Apr 30.

Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, College of Environmental Science and Engineering, Nankai University, Tianjin, China.

Microplastics (MPs) have been attracting wide attention. Biochar (BC) application could improve the soil quality in the contaminated soil. Currently, most studies focused on the effect of MPs or BC on the soil properties and microbial community, while they neglected the combined effects. Read More

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Microplastic pollution in Marine Protected Areas of Southern Sri Lanka.

Mar Pollut Bull 2021 Jul 13;168:112462. Epub 2021 May 13.

Department of Chemistry, Faculty of Science, University of Ruhuna, Matara, Sri Lanka.

Microplastics (MPs) are ubiquitous in marine environment. The prevalence of MPs in coastal and lagoon sediments, and water were studied in two Marine Protected Areas (MPAs); Bundala National Park (BNP) and Hikkaduwa Marine National Park (HNP) in Sri Lanka. Both areas are important for turtles, birds and coral ecosystems, all of which are particularly threatened by MPs. Read More

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Microplastic fibers in the gut of highly consumed fish species from the southern Caspian Sea.

Mar Pollut Bull 2021 Jul 12;168:112461. Epub 2021 May 12.

Department of Chemical and Environmental Engineering, University of Arizona, Tucson, AZ 85721, USA; Department of Hydrology and Atmospheric Sciences, University of Arizona, Tucson, AZ 85721, USA. Electronic address:

This study assesses the frequency, distribution, characteristics, and chemical composition of microplastics (MPs) in the gut of highly consumed fish species, namely leaping mullet (Chelon saliens), common carp (Cyprinus carpioi), and Caspian kutum (Rutilus caspicus), in the southern Caspian Sea biome. Fibers are found to be the only shape of MPs. Black MPs and polystyrene, polypropylene, and polyethylene terephthalate polymers are dominant. Read More

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Feasibility study for simple on-line Raman spectroscopic detection of microplastic particles in water using perfluorocarbon as a particle-capturing medium.

Anal Chim Acta 2021 Jun 16;1165:338518. Epub 2021 Apr 16.

Department of Chemistry and Research Institute for Convergence of Basic Science, Hanyang University, Seoul, 04763, Republic of Korea. Electronic address:

A simple Raman spectroscopic scheme for on-line detection of microplastics (MPs) in water is demonstrated. Instead of using a conventional physical filter for MP separation, perfluorohexane (PFH, CF) was deployed as an MP-capturing medium in this study. When PFH was added into a water-filled L-shape tube, it formed a firm droplet at the bottom of the 90° curve due to its strong hydrophobicity and high density. Read More

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Assessment of the effect of long-term exposure to microplastics and depuration period in Sparus aurata Linnaeus, 1758: Liver and blood biomarkers.

Sci Total Environ 2021 Sep 3;786:147479. Epub 2021 May 3.

Instituto Español de Oceanografía, Centro Oceanográfico de Baleares, Muelle de Poniente s/n, E-07015 Palma de Mallorca, Balearic Islands, Spain. Electronic address:

The constant increase in plastic pollution has attracted great attention in recent years due to its potential detrimental effects on organisms and ecosystems. While the consequences of ingestion of large plastic litter are mostly understood, the impacts resulting from a long-term exposure and a recovery period of microplastics (MPs) are still limited. The aims were to monitor oxidative stress, detoxification and inflammatory biomarkers in liver, plasma and erythrocytes of Sparus aurata exposed during 90 days to low-density polyethylene (LDPE)-MPs enriched diet (10% by weight) followed by 30 days of depuration. Read More

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September 2021

Microplastics levels, size, morphology and composition in marine water, sediments and sand beaches. Case study of Tarragona coast (western Mediterranean).

Sci Total Environ 2021 Sep 30;786:147453. Epub 2021 Apr 30.

Environmental Engineering Laboratory, Departament d'Enginyeria Quimica, Universitat Rovira i Virgili, Av. Països Catalans 26, 43007 Tarragona, Catalonia, Spain.

Mediterranean Sea has been proposed as the sixth greatest accumulation zone for marine litter and the most affected regarding to microplastics (MPs). Tarragona (Catalonia, NE Spain) coastal region suffers high pressure due to urbanization, tourism, industrial harbour and petrochemical/plastic industries. The present study aims to quantify and characterize in size, morphology and composition the MPs present in sandy beaches, marine sediments, and surface seawaters of Tarragona coastal region. Read More

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September 2021

Occurrence, distribution, and characterization of suspended microplastics in a highly impacted estuarine wetland in Argentina.

Sci Total Environ 2021 Sep 16;785:147141. Epub 2021 Apr 16.

Instituto Argentino de Oceanografía (IADO), CONICET/UNS, CCT-Bahía Blanca, Camino La Carrindanga, km 7.5, Edificio E1, B8000FWB Bahía Blanca, Buenos Aires, Argentina. Electronic address:

Microplastics have been a global concern due to their potential and widespread risks to organisms and environments. In this study, we investigated the abundance, distribution, and characteristics of microplastics (MPs) in the surface waters of the Bahía Blanca Estuary (BBE), specifically in its inner and middle zone. The results showed the dominant shape of MPs were fibers, being black, transparent, and blue the main colors. Read More

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September 2021

Simulation of natural aging property of microplastics in Yangtze River water samples via a rooftop exposure protocol.

Sci Total Environ 2021 Sep 23;785:147265. Epub 2021 Apr 23.

State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, China. Electronic address:

Due to low aging rate, the environmental behavior of naturally weathered microplastics (MPs) are not fully understood. Here, we systematically investigated the surface property and adsorption behavior of polypropylene (PP), polyethylene (PE) and polystyrene (PS) MPs during outdoor exposure in Yangtze River water for 18 months, and compared their difference from those in laboratory process. Results showed that compared to PE and PS MPs, PP underwent higher changes in surface aging properties such as rapid fragmentation and surface oxidation. Read More

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September 2021

LDPE and HDPE Microplastics Differently Affect the Transport of Tetracycline in Saturated Porous Media.

Materials (Basel) 2021 Apr 2;14(7). Epub 2021 Apr 2.

Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China.

The accumulation of microplastics (MPs) in soil and sediments may influence the penetration of contaminants into subsurface environments. However, little attention has been paid to comparing the different roles of two common polyethylene (PE) types-low-density polyethylene (LDPE) and high-density polyethylene (HDPE). In this study, the transport behaviors of tetracycline in saturated quartz sand columns in the presence and absence of these two MPs were investigated, respectively. Read More

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Low microplastic abundance in Siganus spp. from the Tañon Strait, Central Philippines.

Environ Pollut 2021 Apr 15;284:117166. Epub 2021 Apr 15.

Institute Man-Society-Environment, Department of Environmental Sciences, University of Basel, Vesalgasse 1, CH-4051, Basel, Switzerland. Electronic address:

Microplastic (MP) occurrence is a major global issue, though data on MP occurrence in the Philippines is limited and the potential effects of MPs on biota are still poorly studied. MP occurrence in fishes remains a concern, especially in economically and ecologically important species such as Siganus spp. This study determined MP occurrence in the gastrointestinal tract of wild rabbit fishes from Tañon Strait, the largest marine protected area in the Philippines. Read More

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Polyethylene microplastics increase cadmium uptake in lettuce (Lactuca sativa L.) by altering the soil microenvironment.

Sci Total Environ 2021 Aug 16;784:147133. Epub 2021 Apr 16.

Qingdao Engineering Research Center for Rural Environment, School of Resources and Environment, Qingdao Agricultural University, Qingdao 266109, PR China. Electronic address:

Little research has focused on the combined pollution of microplastics (MPs) and heavy metals in soil, especially the mechanism of their interaction. We conducted a 45-day microcosm experiment to test the hypothesis that polyethylene (PE) MPs and cadmium (Cd) had a joint toxicity to lettuce fitness. The effects of MPs at different addition ratios on Cd bioavailability and soil properties were also investigated in the microenvironment of three levels of Cd-contaminated soils. Read More

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