Uptake and depuration kinetics of microplastics with different polymer types and particle sizes in Japanese medaka (Oryzias latipes)
81
Citation
45
Reference
10
Related Paper
Citation Trend
Abstract:
Microplastic (MP) pollution and the related impacts on aquatic species have drawn worldwide attention. However, knowledge of the kinetic profiles of MPs in fish remains fragmentary. In this study, we conducted exposure and depuration tests of the following fluorescent-labeled MPs: polyethylene (PE; sphere with 200 or 20 µm diameter) and polystyrene (PS; sphere with 20 or 2 µm diameter) using juvenile Japanese medaka (Oryzias latipes). The distribution and concentration of MPs in medaka were directly determined in-situ after tissue transparency. During the 14-day exposure, MPs was mainly detected in the gastrointestinal tract, while some MPs at the size of ≤ 20 µm were located in the area of the gills and head. The bioconcentration factor (BCF; L/kg) for MPs in medaka was estimated as 74.4 (200 µm PE), 25.7 (20 µm PE), 16.8 (20 µm PS), and 139.9 (2 µm PS). Within the first five days of depuration, MPs were exponentially eliminated from the fish body, but 2 µm PS-MPs could be still detected in the gastrointestinal tract at the end of the 10-day depuration phase. Our results suggest that MPs 2 µm in diameter may pose ecological risks to aquatic species due to their relatively higher BCF and the potential for long-term persistence in the body.Keywords:
Oryzias
Bioconcentration
Persistence (discontinuity)
Plastic pollution includes microplastics. The environmental ubiquity of microplastics (< 5 mm) is evident and the leak of microplastics into the environment is projected to increase globally. Microplastics in the environment possess high heterogeneity in polymer composition, particle size, shapes, and surface chemistry, which sometimes result in contradictory toxicological findings. However, much less attention is paid to the color of microplastics, particularly black plastics that are the least recycled and account for a significant proportion of total plastic waste and environmental microplastics. In the present perspective article, based on 50 field-based research articles on microplastics published from 2014 to 2022 and our own research experience, we raised specific environmental concerns about black microplastics and emphasized the challenges posed by black microplastics in multiple aspects. Future prospects were also discussed for better mitigating black microplastics in the context of plastic pollution.
Plastic pollution
Plastic Waste
Cite
Citations (27)
Cite
Citations (543)
topaz1, a crucial gene for medaka (Oryzias latipes) reproduction. 7. International Workshop on the Biology of Fish Gametes
Oryzias
Sexual reproduction
Cite
Citations (0)
Abstract The study of the bioconcentration kinetics of the accumulation and distribution of cadmium in tissue of a teleost fish, Colisa fasciatus was undertaken in a laboratory ecosystem. The system was exposed to test water with sublethal concentrations of cadmium and the variability of cadmium (Cd+2) in tissue (gills, liver and muscles) was evaluated. Measurements of Cd+2 contained in individual organs expound high concentrations in gills and liver, indicating that the latter are major sites for bioconcentration. The uptake kinetics of Cd+2 in fish tissues evaluated as a function of time showed an initial rapid phase and a later slow phase of accumulation. Keywords: CadmiumbioconcentrationbiomagnificationkineticsColisa fasciatus
Bioconcentration
Tissue distribution
Cite
Citations (4)
Microplastics had been previously excluded from the data on global plastic pollution. Reports of findings from recent years have placed microplastics higher up the priority list. Microplastics have made their way into groundwater, soil, and the oceans. They have also been found to be present in the air samples. Thanks to studies from several research groups we can now identify the main sources of microplastics and their pathway to the world's ocean. While previous reports suggest that plastics released from synthetic textiles containing polyester were the leading source of microplastics, even more, recent studies that focused on microplastics released from paints and coating suggest that paints contribute more to the microplastics in the environment than even textiles. Parameters that affect the rate of microplastic release include washing methods, construction styles in case of release from painted buildings and structures, age of products like tires, climate, and weather conditions. These parameters vary across different regions and so does the impact of microplastic pollution and how it is addressed. Therefore, in this chapter, we will explore the issue of microplastics with a focus on the African region. It discusses microplastics in general as a global issue and a closer look at factors within the African continent that may influence the generation of microplastics from different sources in the region. In the process, the environmental and health implications of microplastics are explored as well as other issues.
Plastic pollution
Cite
Citations (2)
Cite
Citations (25)
Plastic pollution
Cite
Citations (86)
Abstract Marine microplastic pollution has become one of the global problems due to the adverse effects of microplastics on marine organisms. This study investigated the uptake of (Polystyrene, PS) microplastics by marine rotifers ( Brachionus plicatilis ) under different microplastic concentration, exposure time and type of containers. The results showed that the ingestion of microplastics by rotifers was positively correlated with microplastic concentration. The intake reached maximum (65±5 particles/individuals, 5 mg/L; 28±11 particles/individuals, 3 mg/L) at 24 h, and then decreased over time. Moreover, the intake of microplastics in the plastic well plates was much lower than that in the glass vial. This study demonstrated that the intake of microplastics by rotifers varied with microplastics concentration and exposure time. More importantly, microplastics-related experiments using plastic containers could influence the uptake results. This work provides useful information on the interaction of microplastics with marine organisms.
Brachionus
Plastic pollution
Expanded polystyrene
Cite
Citations (5)
Abstract Experimenta were carried out with a cyprinid, Cyprinus carpio, adopting a semi‐static type of test during 3 weeks and using 2/10 of previously determined 48 h copper LC 50 at three different water hardness (50, 100, 300 mg.l‐1 as CaCO3). Bioaccumulation was studied using a sample of gills from three fish that were kept overnight in toxic free water for elimination of the metal adsorbed on surface being samples taken at the start of experimenta and every week. Adaptation assays were also performed submitting fish to increasing proportions of LC50. Bioconcentration factor (BCF) and pollution factor (PF) were determined and a relationship between copper concentrations in water and in the gills was found. Although considering only an external transtegumentary route, it can be admitted that copper concentration in gills might be used as a first approach for a bioindicator of chronic contamination. Thus, if the concentration of copper in water is known, the concentration in aquatic organisms can be calculated from their BCF.
Bioconcentration
Common carp
Cite
Citations (7)
Microplastics are environmental pollutants that prevail in the oceans, remote islands, and polar regions.Exposure to microplastics presents a major emerging threat to the ecosystems due to their potential adverse effects.Herein, we reviewed the literature to provide an up-to-date synopsis of the current understanding of the sources, compositions, and adverse effects of microplastics in humans and the environment.Most studies on microplastics have focused on developing standardized methods for monitoring the occurrence, distribution, and movement of microplastics in the environment, as well as developing microplastic substitutes; however, although humans are exposed to microplastics via various routes, research on the adverse effects of microplastics in humans remains limited.Little is known about the impact of microplastics on human health and the toxic effects that may vary depending on the type, size, shape, and concentration of microplastics.Therefore, more research is needed to understand the cellular and molecular mechanisms of microplastic toxicity and related pathologies.
Cite
Citations (101)