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61,005 resultsShowing papers similar to Aging Changes theVector Effects of Various Microplasticson the Bioaccumulation of Decabromodiphenyl Ethane in Earthworms
ClearAging Changes the Vector Effects of Various Microplastics on the Bioaccumulation of Decabromodiphenyl Ethane in Earthworms
Researchers examined how UV aging of polyethylene and polylactic acid microplastics changes their ability to carry the flame retardant DBDPE into earthworm intestines, finding that aged biodegradable PLA-MPs increased bioaccumulation by 15% while aged PE-MPs decreased it by 21%, demonstrating polymer-specific vector effects.
Size-dependent vector effects of microplastics on bioaccumulation of hydrophobic organic contaminants in earthworm: A dual-dosing study
Researchers developed a dual-dosing method to directly measure how microplastics act as carriers for hydrophobic organic contaminants in earthworms. The study found that smaller microplastic particles had greater vector effects, increasing bioaccumulation of pollutants, and that dermal uptake played a significant role in contaminant transfer from microplastics to organisms.
Influence of aged and pristine polyethylene microplastics on bioavailability of three heavy metals in soil: Toxic effects to earthworms (Eisenia fetida)
Researchers studied how aging affects the ability of polyethylene microplastics to influence the bioavailability of zinc, lead, and cadmium in soil, and the resulting toxicity to earthworms. The study found that aged microplastics had different adsorption properties for heavy metals compared to pristine particles, which altered the bioavailability of these metals and affected earthworm health differently depending on microplastic concentration and aging status.
Strong but reversible sorption on polar microplastics enhanced earthworm bioaccumulation of associated organic compounds
Sorption experiments showed that organic compounds bound more strongly to polar biodegradable microplastics than to conventional polypropylene, but that strong binding reduced bioavailability to earthworms, with earthworm bioaccumulation of phenanthrene from MP-contaminated soil following patterns predicted by equilibrium partitioning rather than carrier effects.
[Sorption of Polybrominated Diphenyl Ethers by Virgin and Aged Microplastics].
This study examined how environmental aging under UV light changes the ability of polyethylene and polystyrene microplastics to adsorb polybrominated diphenyl ethers (PBDEs), common flame retardant chemicals. Aged microplastics showed altered sorption capacity compared to virgin particles, affecting how these toxic chemicals are transported in aquatic environments.
Combined toxicity of organophosphate flame retardants and polyethylene microplastics on Eisenia fetida: Biochemical and molecular insights
Researchers exposed earthworms to polyethylene microplastics, chlorinated flame retardants, and their combinations to assess combined toxicity effects. They found that the most toxic flame retardant (TDCPP) had its effects reduced when combined with microplastics, likely because the plastics absorbed the chemical and lowered its bioavailability. In contrast, microplastics enhanced the toxicity of another flame retardant (TCPP), demonstrating that microplastics can act as both carriers and modulators of co-contaminant toxicity in soil ecosystems.
Microplastics as a Vector for HOC Bioaccumulation in Earthworm Eisenia fetida in Soil: Importance of Chemical Diffusion and Particle Size
Researchers investigated whether microplastics act as vectors for hydrophobic organic contaminant (HOC) bioaccumulation in earthworms, testing two scenarios with polyethylene particles of different sizes and polychlorinated biphenyls in soil. Results showed that clean microplastics in contaminated soil reduced HOC bioaccumulation, while smaller precontaminated microplastics enhanced transfer of PCBs to earthworms, demonstrating that particle size and prior contamination status are critical factors.
Assessing the role of polyethylene microplastics as a vector for organic pollutants in soil: Ecotoxicological and molecular approaches
Polyethylene microplastics were shown to act as vectors for organic pollutants including pharmaceuticals and pesticides in soil, with earthworm bioaccumulation assays and molecular endpoints revealing that MPs increased contaminant uptake compared to soil exposure alone.
Polylactic acid microplastics induce higher biotoxicity of decabromodiphenyl ethane on earthworms (Eisenia fetida) compared to polyethylene and polypropylene microplastics
Researchers compared the combined toxicity of the flame retardant DBDPE with three types of microplastics on earthworms and found that polylactic acid (a bio-based plastic) caused more severe damage than conventional polyethylene or polypropylene. The co-exposure led to neurotoxic effects, tissue damage, and significant transcriptomic changes in the earthworms. The findings challenge the assumption that biodegradable plastics are inherently safer than conventional plastics when interacting with environmental contaminants.
Biodegradable microplastics exert differential impacts from polyethylene on pesticide fate in soil-earthworm systems: insights into degradation selectivity and microbial mechanisms
This study compared how conventional polyethylene and biodegradable polylactic acid (PLA) microplastics affect pesticide behavior in soil with earthworms. Researchers found that PLA at high concentrations actually accelerated pesticide breakdown and increased the accumulation of pesticide byproducts in earthworms by up to 82%, while also causing oxidative stress and gut bacteria disruption, suggesting biodegradable plastics may pose their own set of environmental risks.
Soil health risks caused by interactions of microplastics and pesticides
Chlorpyrifos adsorption and desorption on pristine and UV-aged LDPE and biodegradable microplastics derived from plastic mulch films was investigated in laboratory experiments, along with bioconcentration in earthworms. Aging altered the adsorption-desorption behavior of both plastic types and affected pesticide bioavailability to earthworms, highlighting risks from pesticide-microplastic interactions in agricultural soils.
Insight into Bioaccumulation of Decabromodiphenyl Ethane in Eisenia fetida Increased by Microplastics
Researchers found that microplastics made from electronics casings significantly increased the accumulation of a brominated flame retardant chemical in earthworms over time. While the microplastics initially slowed absorption of the chemical, after 28 days they promoted greater bioaccumulation by altering the soil environment and the earthworms' gut bacteria. The study suggests that the co-occurrence of electronic waste microplastics and flame retardants in soil may amplify chemical exposure in soil organisms.
Use of a Dual-Labeled Bioaccumulation Method to Quantify Microplastic Vector Effects for Hydrophobic Organic Contaminants in Soil
Researchers developed a dual-labeled method using isotope-tagged contaminants on microplastics to directly quantify the vector effect of microplastics for hydrophobic organic contaminants in soil, finding that earthworms can assimilate pollutants from both soil and microplastic sources.
Adsorption behaviors and bioavailability of tetrabromobisphenol A in the presence of polystyrene microplastic in soil: Effect of microplastics aging
Researchers studied how aging changes the ability of polystyrene microplastics to absorb and release a flame retardant chemical called TBBPA in soil. They found that aged microplastics had a greater capacity to adsorb the chemical but also released it more readily, increasing the bioavailability of this toxic compound to soil organisms. The study reveals that as microplastics weather in the environment, they may actually become more effective carriers of harmful chemicals into the food chain.
The impact of microplastic on nematodes: Soil type, plastic amount and aging as determinants for the fitness of Caenorhabditis elegans
Researchers tested how two types of microplastics, conventional polyethylene and biodegradable PLA/PBAT, affected tiny soil worms called nematodes across different soil types. Conventional plastic at high concentrations reduced worm reproduction and growth, while the biodegradable plastic caused no harm. Importantly, as microplastics aged in the soil over time, their negative effects worsened, suggesting the long-term impact of plastic pollution in agricultural soil may be greater than short-term studies indicate.
Virgin and Photoaged Polyethylene Microplastics Have Different Effects on Collembola and Enchytraeids
Researchers compared how virgin and UV-aged polyethylene microplastics affect two types of small soil organisms at environmentally relevant concentrations. They found contrasting responses between species: one type showed reduced survival but increased reproduction with aged particles, while another showed the opposite pattern. The study highlights that microplastic aging and species differences both matter when assessing the ecological impact of plastic pollution in soils.
Comparison of reproductive toxicity between pristine and aged polylactic acid microplastics in Caenorhabditis elegans
This study compared the effects of new versus UV-aged biodegradable PLA microplastics on reproductive health using a worm model, finding that aged particles caused significantly more reproductive damage and DNA injury. The results suggest that biodegradable plastics become more toxic as they weather in the environment, which matters because these aged particles are what organisms, including humans, are most likely to encounter.
Earthworms Exposed to Polyethylene and Biodegradable Microplastics in Soil: Microplastic Characterization and Microbial Community Analysis
Researchers exposed earthworms to biodegradable and conventional polyethylene microplastics in natural soil and found that worms ingested both types. The biodegradable plastic showed signs of partial breakdown in the earthworm gut, while conventional polyethylene remained unchanged. Although microplastics did not significantly alter the soil or gut microbiome in this study, the results confirm that earthworms transport microplastics through soil ecosystems.
Effects of nano- and microplastics on the bioaccumulation and distribution of phenanthrene in the soil feeding earthworm Metaphire guillelmi
Researchers investigated how nano- and microplastics affect the bioaccumulation of phenanthrene (a polycyclic aromatic hydrocarbon) in soil-feeding earthworms using C-radioactive labeling, finding that fine plastic particles decreased phenanthrene bioavailability in soil and reduced uptake by Metaphire guillelmi earthworms, with nanoplastics showing a stronger dilution effect than microplastics. Soil properties remained the dominant factor controlling bioaccumulation efficiency, and only limited vector effects of the plastic particles were observed.
Impacts of polyethylene microplastics on the performance and mechanism of di-2-ethylhexyl phthalate (DEHP) degradation by two ecotype earthworms
Researchers examined how polyethylene microplastics affect di-2-ethylhexyl phthalate (DEHP) biodegradation by two ecotypes of earthworms in soil. Both earthworm ecotypes accelerated DEHP degradation (up to 72% without microplastics), but microplastic co-contamination reduced degradation efficiency to 51%, likely by altering soil microbiome composition.
Aging enhancement and synergistic effect on toxicity to soil fauna by polystyrene microplastics-tetrabromobisphenol A toxicity exposure
Researchers investigated the combined toxicity of aged polystyrene microplastics and the flame retardant tetrabromobisphenol A on earthworms, finding that aging enhanced the microplastics' ability to adsorb and deliver the toxic chemical. The co-exposure produced synergistic effects including increased oxidative stress, gut microbiome disruption, and tissue damage beyond what either contaminant caused alone. The study highlights that weathered microplastics in contaminated soils may amplify the toxicity of co-occurring industrial chemicals.
Low-density polyethylene microplastics as a source and carriers of agrochemicals to soil and earthworms
Researchers investigated whether low-density polyethylene microplastics could act as carriers of agrochemicals in soil and found that the particles both released their own chemical additives and transported pesticides to earthworms. The study suggests microplastics in agricultural soils may serve as a previously underappreciated pathway for chemical exposure in soil organisms.
Adsorption/desorption behavior of degradable polylactic acid microplastics on bisphenol A under different aging conditions
Researchers studied how different types of UV-simulated aging affect the ability of polylactic acid microplastics to adsorb and release bisphenol A. The study found that aging conditions changed the surface properties of the biodegradable plastic, altering its interaction with this common environmental contaminant. The findings suggest that even biodegradable microplastics can act as carriers of harmful chemicals depending on their degradation state.
Combined toxicity of microplastics and arsenic to earthworm (Eisenia fetida): a comparison of polyethylene, polylactic acid, and polybutylene adipate-co-terephthalate
Researchers compared how conventional polyethylene and biodegradable microplastics (PLA and PBAT) interact with arsenic in soil using earthworms as a model organism over 28 days. The study found that all microplastic types reduced arsenic bioaccumulation in earthworm tissues, with biodegradable plastics showing stronger reductions, though co-exposure still caused physiological and oxidative stress effects.