Seasonal variation of diversity, weathering, and inventory of microplastics in coast and harbor sediments

The Science of The Total Environment, Год журнала: 2021, Номер 781, С. 146610 - 146610

Опубликована: Март 26, 2021

Язык: Английский

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Critical review of the characteristics, interactions, and toxicity of micro/nanomaterials pollutants in aquatic environments

Marine Pollution Bulletin, Год журнала: 2022, Номер 174, С. 113276 - 113276

Опубликована: Янв. 1, 2022

Язык: Английский

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Crack Patterns of Environmental Plastic Fragments

Environmental Science & Technology, Год журнала: 2022, Номер 56(10), С. 6399 - 6414

Опубликована: Май 5, 2022

Secondary microplastics usually come from the breakdown of larger plastics due to weathering and environmental stress cracking plastic wastes. In present study, 5013 fragments were collected coastal beaches, estuary dikes, lake banks in China. The fragment sizes ranged 0.2 17.1 cm, dominant polymers polypropylene polyethylene. Cracks observed on surfaces 49–56% fragments. Based extracted crack images, we proposed a general pattern system including four types with specific definitions, abbreviations, symbols. two-dimensional spectral analysis cracks suggests that first three patterns showed good regularity supported rationality system. Some metrics (e.g., line density) closely correlated carbonyl index additives phthalate esters) For investigation field, succinct protocol, which five ranks established directly characterize degree based density values. was successfully applied distinguish differences features at two representative sites, indicates is useful tool describe morphological changes environment.

Язык: Английский

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Weathering indices of microplastics along marine and coastal sediments from the harbor of Cartagena (Spain) and its adjoining urban beach

Marine Pollution Bulletin, Год журнала: 2022, Номер 178, С. 113647 - 113647

Опубликована: Апрель 13, 2022

Marine and coastal sediments from the harbor of Cartagena (Spain) its adjoining beach were investigated regarding their microplastic burden. Fibers accounted for 47.62% 61.66% in marine sediments, respectively, followed by films (31.43% 18.76%) fragments (20.95% 18.65%). Polyvinyl (36.07%), polypropylene (21.31%), polyethylene (18.03%) isolated low-density (40.71%), (20.16%), acrylate (11.37%) sediments. Highest concentrations found deepest (24.0 m) furthest zone seashore (18 m). Carbonyl index increased intermediate area (12.5 (0.51), whilst vinyl was maximum samples (1.94), reporting Norrish type I II reactions, respectively. Coastal collected close to high tide line displayed highest average values both indices, 1.57 1.29, indicating a higher exposition weathering variables.

Язык: Английский

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Dissolved organic matter derived from biodegradable microplastic promotes photo-aging of coexisting microplastics and alters microbial metabolism

Journal of Hazardous Materials, Год журнала: 2022, Номер 445, С. 130564 - 130564

Опубликована: Дек. 7, 2022

Язык: Английский

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The distribution and characterisation of microplastics in air, surface water and sediment within a major river system

The Science of The Total Environment, Год журнала: 2023, Номер 901, С. 166640 - 166640

Опубликована: Авг. 29, 2023

Rivers are key pathways for the transfer of microplastics (MP) to marine environments. However, there considerable uncertainties about amount transported by rivers ocean; this results in inaccuracies our understanding microplastic quantity and transport freshwater systems. Additionally, it has been suggested that may represent long-term sinks, with accumulating sediment due their high density or other biological, chemical, physical factors. The atmosphere is also an important pathway which airborne enter aquatic habitats. Here, we compare first time type concentration these environmental mediums (air, water sediment) along a major river (Ganges), from sea source understand 1) abundance, 2) spatial distribution, 3) characteristics. Mean abundance settling was 41.12 MP m2 day-1; while concentrations were 57.00 kg-1 0.05 L-1. Across all sites mediums, rayon (synthetically altered cellulose) dominant polymer (54-82 %), followed acrylic (6-23 %) polyester (9-17 %). Fibres shape (95-99 blue most common colour (48-79 number per sample increased Ganges sea. higher population densities correlated air samples. We suggest clothing likely be prominent system, influenced atmospheric deposition, wastewater direct input (e.g. handwashing clothes Ganges), especially areas. subsequent release environment strongly shape, large proportion denser prior discharging ocean.

Язык: Английский

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Comparative evaluation of the carbonyl index of microplastics around the Japan coast

Marine Pollution Bulletin, Год журнала: 2023, Номер 190, С. 114818 - 114818

Опубликована: Март 27, 2023

Язык: Английский

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Are microplastics contributing to pollution-induced neurotoxicity? A pilot study with wild fish in a real scenario

Heliyon, Год журнала: 2023, Номер 9(1), С. e13070 - e13070

Опубликована: Янв. 1, 2023

Pollution-induced neurotoxicity is of high concern. This pilot study investigated the potential relationship between presence microplastics (MPs) in brain 180 wild fish (Dicentrarchus labrax, Platichthys flesus, Mugil cephalus) from a contaminated estuary and activity acetylcholinesterase (AChE) enzyme. MPs were found 9 samples (5% total), all them D. labrax collected summer, which represents 45% this species that season (20). Seventeen recovered samples, with sizes ranging 8 to 96 μm. Polyacrylamide, polyacrylic acid one biopolymer (zein) identified by Micro-Raman spectroscopy. Fish showed lower (p ≤ 0.05) AChE than those where not found. These findings point contribution induced long-term exposure pollution, stressing need further studies on topic increase 'One Health' protection.

Язык: Английский

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Ecotoxicity of micro- and nanoplastics on aquatic algae: Facts, challenges, and future opportunities

Journal of Environmental Management, Год журнала: 2023, Номер 346, С. 118982 - 118982

Опубликована: Сен. 21, 2023

Язык: Английский

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Potential ecological risk assessment of microplastics in coastal sediments: Their metal accumulation and interaction with sedimentary metal concentration

The Science of The Total Environment, Год журнала: 2023, Номер 906, С. 167473 - 167473

Опубликована: Сен. 29, 2023

Metal pollution in sediments has long been recognized, while are also a long-term sink for microplastics (MPs). MPs may adsorb environmental pollutants, including metals, as well leaching polymer components and chemicals used during production. A comprehensive survey of 21 locations around Qatari coastline investigated abundance high-shore intertidal concentration metals both on sediment particles. ranged from 3 to 156 particles·kg−1 (12–624 particles·m−2) with polyethylene being the most abundant (27.4 %). showed physical morphologies, 76 % displayed signs chemical degradation confirmed by carbonyl absorption peak profile, possibly due exposure harsh conditions Arabian Gulf shores. Most analyzed were found at higher concentrations than same adsorbed MPs. The average metal 0.26 (Cd) 3122.62 μg∙g−1 (Sr) 0.22 (Mo) 30.26 calculated Pollution Load Index (Sed PLI, range 0.57–2.38) indicates unpolluted moderately polluted levels, Potential Ecological Risk PERI, 6.9–2220) relatively considerable ecological risk some coastal areas surveyed. PLI values associated (MPs 1.1–7.5), suggests moderate pollution, PERI 25.2–1811) similar terms pollutants sediments. This be effective providing relative spatial indices load MPs, which could potentially inform establishment an appropriate assessment framework, where increasingly However, this does not account lower compared

Язык: Английский

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