Unveiling microplastics pollution in a subtropical rural recreational lake: A novel insight

Environmental Research, Journal Year: 2024, Volume and Issue: 250, P. 118543 - 118543

Published: Feb. 26, 2024

Language: Английский

---

Biofragmentation of Polystyrene Microplastics: A Silent Process Performed by Chironomus sancticaroli Larvae

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(10), P. 4510 - 4521

Published: March 1, 2024

Polystyrene (PS) is one of the main synthetic polymers produced around world, and it present in composition a wide variety single-use objects. When released into environment, these materials are degraded by environmental factors, resulting microplastics. We investigated ability

Language: Английский

---

Exploring the potential of earthworm gut bacteria for plastic degradation

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 927, P. 172175 - 172175

Published: April 2, 2024

The use of plastic mulch films in agriculture leads to the inevitable accumulation debris soils. Here, we explored potential earthworm gut-inhabiting bacterial strains (Mycobacterium vanbaalenii (MV), Rhodococcus jostii (RJ), Streptomyces fulvissimus (SF), Bacillus simplex (BS), and Sporosarcina globispora (SG) degrade (⌀ = 15 mm) made from commonly used polymers: low-density polyethylene film (LDPE-f), polylactic acid (PLA-f), polybutylene adipate terephthalate (PBAT-f), a commercial biodegradable film, Bionov-B® (composed Mater-Bi, feedstock with PBAT, PLA other chemical compounds). A 180-day experiment was conducted at room temperature (x̄ =19.4 °C) for different strain–plastic combinations under low carbon media (0.1× tryptic soy broth). Results showed that tested did not facilitate degradation LDPE-f (treated RJ SF), PBAT-f BS SG), Bionov-B BS, MV, SG). However, incubating PLA-f SF triggered reduction molecular weights an increase crystallinity. Therefore, as model study influence ("room temperature" & "30 °C"), source ("carbon-free" "low supply"), strain interactions ("single strains" "strain mixtures") on degradation. + treatments significantly fostered 30 °C low-carbon media. show any carbon-free treatments. competition between same system likely hindered performance PLA-degrading strains. positive correlation final pH culture weight loss observed, which might reflect pH-dependent hydrolysis mechanism PLA. Our results situate its co-culture possible accelerators temperatures below glass transition (Tg). Further studies are needed test bioremediation feasibility

Language: Английский

---

Generation and Fate of Nanoplastics in the Intestine of Plastic-Degrading Insect (Tenebrio molitor Larvae) during Polystyrene Microplastic Biodegradation

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(23), P. 10368 - 10377

Published: May 30, 2024

The insect Tenebrio molitor exhibits ultrafast efficiency in biodegrading polystyrene (PS). However, the generation and fate of nanoplastics (NPs) intestine during plastic biodegradation remain unknown. In this study, we investigated PS microplastics (MPs) mediated by T. larvae over a 4-week period confirmed analyzing Δδ13C before after biotreatment (−28.37‰ versus −24.88‰) as an effective tool. ·OH radicals, primarily contributed gut microbiota, H2O2, produced host, both increased MP digestion. size distribution residual particles excrements fluctuated within micrometer ranges. NPs were detected but not excrements. At end Weeks 1, 2, 3, 4, concentrations tissues 3.778, 2.505, 2.087, 2.853 ng/lava, respectively, while glands quantified at 0.636, 0.284, 0.113 ng/lava eventually fell below detection limit. remained limit 5 6. This indicates that initially, generated entered glands, then declined gradually disappeared or possibly biodegraded Week associated with elevated plastic-degrading capacities larvae. Our findings unveil rapid synergistic larval host well NPs, providing new insights into risks invertebrate-mediated biodegradation.

Language: Английский

---

Impact of Combined Thermo- and Photo-Oxidation on the Physicochemical Properties of Oxo-Biodegradable Low-Density Polyethylene Films

Polymers, Journal Year: 2025, Volume and Issue: 17(2), P. 193 - 193

Published: Jan. 14, 2025

This research addresses the study of combined effect two abiotic treatments, a thermo-oxidative treatment followed by photo-oxidative with ultraviolet light, on physicochemical properties commercially available low-density polyethylene films an oxo-degradant additive (OXOLDPE) and without (LDPE). The change in oxidized film was characterized using FTIR, XRD, TGA, GPC, SEM analytical techniques. results indicated that increment carbonyl index (CI) crystallinity percentage (XXRD) higher for those received oxidative treatments compared only one them, thermo- or treatment. Moreover, produced more ester carboxylic groups degradation products than other single treatments. An analysis variance (ANOVA) carried out, synergistic observed between both products. TGA revealed loss thermal stability significant after their exposure to which one. GPC showed is necessary decrease Mz Mz+1 average molecular weight degraded containing same extent as MW Mn. surface appearance changed drastically they seemed erode presence inorganic fillers (CaCO3). These suggest lower greater content should enhance its environmental biodegradability.

Language: Английский

---

When plastisphere and drilosphere meet: Earthworms facilitate microbiome and nutrient turnover to accelerate biodegradation of agricultural plastic films

Environment International, Journal Year: 2025, Volume and Issue: unknown, P. 109309 - 109309

Published: Jan. 1, 2025

Language: Английский

---

Enhancing microplastic removal and nitrogen mitigation in constructed wetlands: An earthworm-centric perspective

Journal of Hazardous Materials, Journal Year: 2025, Volume and Issue: 489, P. 137540 - 137540

Published: Feb. 8, 2025

Language: Английский

---

Exploring the toxicity of biodegradable microplastics and imidacloprid to earthworms (Eisenia fetida) from morphological and gut microbial perspectives

Environmental Pollution, Journal Year: 2023, Volume and Issue: 337, P. 122547 - 122547

Published: Sept. 12, 2023

Language: Английский

---

The effects of polyethylene microplastics on the growth, reproduction, metabolic enzymes, and metabolomics of earthworms Eisenia fetida

Ecotoxicology and Environmental Safety, Journal Year: 2023, Volume and Issue: 263, P. 115390 - 115390

Published: Aug. 22, 2023

The existing data regarding the effects of polyethylene (PE) microplastics (MPs) smaller than 5 mm in size on earthworms are insufficient to fully comprehend their toxicity. In this study, Eisenia fetida were exposed artificially added PE at a concentration ranging from 0.05 20 g/kg soil (0.005%-2%) for 60 days determine range causing negative and uncover potential toxic mechanisms. individual growth, reproduction, metabolic enzyme activities, including phase I enzymes (cytochrome P450 [CYP] 1A2, 2B6, 2C9, 3A4), II (superoxide dismutase (SOD), catalase (CAT), glutathione sulfotransferase (GST)), metabolomics measured. observed variations responses multiple cross-scale endpoints indicated that indices less responsive MPs or metabolomics. Despite absence significant alterations growth inhibition based body weight, concentrations equal exceeding 2.5 found exert effect earthworms, which was evidenced by changes activities (CYP1A2, 3A4, SOD, CAT, GST) important small molecule metabolites screened metabolomics, likely due bioaccumulation PE. toxicity is inferred be associated with neurotoxicity, oxidative damage, decreased detoxification capacity, energy metabolism imbalance, impaired amino acid purine bioaccumulation. findings study will enhance our understanding molecular mechanisms contribute more accurate assessment ecological risks posed soil.

Language: Английский

---

Biodegradation of polyvinyl chloride, polystyrene, and polylactic acid microplastics in Tenebrio molitor larvae: Physiological responses

Journal of Environmental Management, Journal Year: 2023, Volume and Issue: 345, P. 118818 - 118818

Published: Aug. 24, 2023

Language: Английский

---