Efficient plastic detection in coastal areas with selected spectral bands

Marine Pollution Bulletin, Год журнала: 2024, Номер 207, С. 116914 - 116914

Опубликована: Сен. 7, 2024

Язык: Английский

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Field experiment confirms high macroplastic trapping efficiency of wood jams in a mountain river channel

Scientific Reports, Год журнала: 2025, Номер 15(1)

Опубликована: Янв. 23, 2025

Identifying macroplastic deposition hotspots in rivers is essential for planning cleanup efforts and assessing the risks to aquatic life aesthetic value of river landscapes. Recent fieldwork mountain has shown that wood jams retain significantly more than other emergent surfaces within channels. Here, we experimentally verify these findings by tracking 64 PET bottles after 52-65 days transport mid-mountain Skawa River (Polish Carpathians) under low medium flow conditions. Despite variations channel management resulting morphological patterns along study reach, majority (71.9%, n = 46) tracked were trapped near low-flow channel. The trapping efficiency was three times higher straight, regulated reach (14.8% per km) highly sinuous, unregulated (4.5% km). In water inundations are confined a narrow zone channel, which may explain high contrast, unmanaged, seminatural where inundation occur over broader areas formed extensive gravel bars, potential lower similar Previous observations showed associated with predominantly form wide, unmanaged sections, numerous inundated during flows. Our results detail this understanding, suggesting flows, can also on regulated, reaches. These suggest occurrence jams, morphology past conditions key predictors formation rivers.

Язык: Английский

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Jute bags as a sustainable alternative to single-use plastic bags in Bangladesh: Rethinking the sole reliance on life cycle assessment

Sustainable Production and Consumption, Год журнала: 2025, Номер unknown

Опубликована: Март 1, 2025

Язык: Английский

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Where Does Plastic Waste Go? Local Dynamics of Waste Flows in Indonesian Neighbourhoods

Environmental Challenges, Год журнала: 2025, Номер unknown, С. 101135 - 101135

Опубликована: Март 1, 2025

Язык: Английский

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The Effect of the Addition of Maguey Bagasse in the Production of Bioplastics Based on Corn and Potato Starch

Journal of Composites Science, Год журнала: 2025, Номер 9(5), С. 213 - 213

Опубликована: Апрель 28, 2025

Synthetic plastic impacts the environment due to its slow degradation and generation of microplastics, driving development bioplastics. This study evaluated use bagasse fiber combined with corn potato starch improve physical mechanical properties Five bioplastic mixtures (Am1 Am5) were prepared starch, glycerin, acetic acid, maleic anhydride, agave bagasse. Am1 was without bagasse, others different amounts (0, 10, 30, 50, 70 g). Bioplastics made from (Ap1 Ap5) also produced under same conditions assessed using thermogravimetric (TGA) scanning electron microscopy (SEM) tests. Analysis variance showed significant differences (p < 0.001) in moisture, Young’s modulus, stress The corn-based bioplastics exhibited lower moisture values (7.26% 5.51%) compared potato-based ones (9.68% 8.89%). modulus increased (Am5 = 4.59 MPa) (Ap5 3.53 higher Furthermore, TGA SEM revealed surface morphology effects processing, based on their results, it found that improved thermal bioplastics, especially ones, suggesting potential as a material environmental impact.

Язык: Английский

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Plastic-wood jams: macroplastic deposition on woody debris in a Mediterranean mountain river and its similarities to temperate ecosystems

Hydrobiologia, Год журнала: 2025, Номер unknown

Опубликована: Май 6, 2025

Язык: Английский

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Do river garbage patches exist?

Frontiers in Environmental Science, Год журнала: 2024, Номер 12

Опубликована: Окт. 22, 2024

MainThe Ocean Garbage Patches (OGPs) are the most evident example of artificial litter accumulation hotspots on ocean's surface1, presenting a unique opportunity for effective removal floating from marine environment2. Recent evidence suggests that can also form water, in sediments and vegetation riverine ecosystems3-8,10. These because rivers act both as carriers land-produced to sea long-term sinks it 3, 5, 7. This trapped poses numerous risks ecosystem functioning human health2, 6.To stimulate future discussion garbage patches (RGPs), defined here concentrated or surface-stored rivers, we outlined their key characteristics comparison ocean (Figure 1). The difference between these two types is individual RGPs cover areas several orders magnitude smaller than OGPs, yet they provide plastic abundances higher. Figure 1. Plastic oceans. In larger panel, left right, flow through dam reservoirs river deltas Most plastics remain within situation further explained panel left. this groynes, riparian vegetation, woody debris, beaver dams illustrated potential local-scale macroplastics rivers. During floods, rising water levels transport out channel, depositing them along riverbanks interacting with elements.For example, concentration Great Pacific Patch (GPGP), which considered oceanic patch highest plastics, reaches 70 kg/km² (0.07 g/m²) 700,000 items/km² (0.7 items/m²) (Table 2 Lebreton et al.,1). contrast, especially riverbanks, exhibit values at least highere.g., 4,8. For instance, amount macroplastic stored wood jams moderately polluted mountain averages 9.5 items 113 grams per m² 4. Although rough estimation, should consider likely an underestimation macrolitter very few studies currently address issue 3,7. existing field modelling works focus oceans 9,11-13. Future research gathering more data (RGPs) estimating global extent, ultimately enabling comparisons OGPs.River ecosystems recently hypothesized function time when large floods not occurring3, 7, 10, such events lead massive erosion RGPs, resulting mobilization3, fragmentation downstream transport7. contributes dispersal macroplastic3,7, production secondary microplastic14, increasing related biota health. It important notice OGPs may be fueled by inputs only receive small portion land-based plastics1,13, given nearshore fragments might reach open ocean, apart sea-based sources13 1).Recent indicated vary considerably depending Due complex hydromorphological land patterns ecosystems, even local scale landscape geomorphological unit, tend localized specific rivers4. contrasts patches, often widespread1, 2. typically surrounded while populated enclosed easier access transportation. increases removing cleanup efforts implementation engineering infrastructure. have significantly surface area compared size location shift over time, making challenging costly. generally stable throughout existence, except during rare periods mobilization caused major floods3,7,10.Future OutlookComparing total versus remains challenging, significant sources pollution available environments incomplete inconsistent. Here, highlight features hotspots, suggesting potentially different opportunities challenges environment. Since abundant plastic, widespread, accessible, scattered, substantially clean-up citizen science initiatives RGPs. Evaluating cost-effectiveness activities could crucial step mitigating addressing pollution.

Язык: Английский

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Riverbank plastic distributions and how to sample them

Microplastics and Nanoplastics, Год журнала: 2024, Номер 4(1)

Опубликована: Ноя. 1, 2024

Abstract As plastic pollution exists in aquatic ecosystems globally, monitoring its abundance and distribution has become crucial for understanding transport pathways, sources, sinks, impacts. Riverbanks are accumulation zones plastic, but the selection of methods is constrained by research goals, available resources, site-specific conditions. This diversity approaches led to disparate datasets, highlighting need standardized protocols. Here, we study spatial at riverbank scale, quantify uncertainty existing methods, provide recommendations improved based on balance between loss increase effort. We measured eight Dutch riverbanks, categorizing items using 108 item categories (River-OSPAR). For every riverbank, an area 100 25 meters was subdivided into five-by-five-meter squares, resulting individual monitored sub-areas. found exhibited high variability, with deposition patterns ranging from parallel waterline clustered, random, or uniform (Moran’s I -0.050 0.301). Individual measurements diverse sampling protocols 5-49 times less accurate than estimates derived extensive sampling, diminishing impact specific increased data collection. Lastly, our findings suggest that increasing quickly reaches returns terms accuracy. Reducing sampled 80% only increases estimating true density 20%. While essential comparability, a rigid, approach may be efficient resource-intensive flexible (step-wise) strategy adapts local By demonstrating can mitigate differences unique protocols, this promotes shift towards monitoring, ultimately accelerating global efforts combat pollution.

Язык: Английский

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Riverbank plastic distributions and how to sample them

Research Square (Research Square), Год журнала: 2024, Номер unknown

Опубликована: Авг. 30, 2024

As plastic pollution exists in aquatic ecosystems globally, monitoring its abundance and distribution has become crucial for understanding transport pathways, sources, sinks, impacts. Riverbanks are accumulation zones plastic, but the selection of methods is constrained by research goals, available resources, site-specific conditions. This diversity approaches led to disparate datasets, highlighting need standardized protocols. Here, we study spatial at riverbank scale, quantify uncertainty existing methods, provide recommendations improved based on balance between loss increase effort. We measured eight Dutch riverbanks, categorizing items using 108 item categories (River-OSPAR). For every riverbank, an area 100 25 meters was subdivided into five-by-five-meter squares, resulting individual monitored sub-areas. found exhibited high variability, with deposition patterns ranging from parallel waterline clustered, random, or uniform (Moran's I -0.050 0.301). Individual measurements diverse sampling protocols 5-49 times less accurate than estimates derived extensive sampling, diminishing impact specific increased data collection. Lastly, our findings suggest that increasing quickly reaches returns terms accuracy. Reducing sampled 80% only increases estimating true density 20%. While essential comparability, a rigid, approach may be efficient resource-intensive flexible (step-wise) strategy adapts local By demonstrating can mitigate differences unique protocols, this promotes shift towards monitoring, ultimately accelerating global efforts combat pollution.

Язык: Английский

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Characterization and Evaluation of Zero-Order Release System Comprising Glycero-(9,10-trioxolane)-trialeate and PLA: Opportunity for Packaging and Biomedicine Applications

Polymers, Год журнала: 2024, Номер 16(24), С. 3554 - 3554

Опубликована: Дек. 20, 2024

Glycerol-(9,10-trioxolane) trioleate (OTOA) is a promising material that combines good plasticizing properties for PLA with profound antimicrobial activity, which makes it suitable application in state-of-the-art biomedical and packaging materials added functionality. On the other hand, of OTOA PLA-based antibacterial hindered by lack knowledge on kinetics release. In this work, release glycero-(9,10-trioxolane) from films 50% content was studied during incubation normal saline solution, first time, film evaluated. Morphological, thermal, structural mechanical + were corresponding using differential scanning calorimetry (DSC), X-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy tests. It confirmed DSC XRD solution does not lead to significant changes structure polymer matrix. Thus, formation more disturbed α’ crystalline phase due partial hydrolysis amorphous zones and/or most unstable crystallites PLA/OTOA semi-crystalline observed. The degree crystallinity also slightly increased at prolonged stages retained its strength after saline, slight increase elastic modulus tensile strength, accompanied decrease relative elongation break. obtained results showed could be characterized sustained amount released exceeding initial film. profile close zero-order kinetics, beneficial order provide stable drug pattern. Developed strong effect against Raoultella terrigena Escherichia coli, bacterial strains multidrug resistance behavior. resulting used variety applications, including wound dressings food packaging.

Язык: Английский

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