دورية أكاديمية
Fragmentation and depolymerization of microplastics in the earthworm gut: A potential for microplastic bioremediation?
| العنوان: | Fragmentation and depolymerization of microplastics in the earthworm gut: A potential for microplastic bioremediation? |
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| المؤلفون: | Meng K; Soil Physics and Land Management Group, Wageningen University & Research, Droevendaalsesteeg 3, 6708PB Wageningen, the Netherlands. Electronic address: jasonmengke@126.com., Lwanga EH; Soil Physics and Land Management Group, Wageningen University & Research, Droevendaalsesteeg 3, 6708PB Wageningen, the Netherlands; Agroecología, El Colegio de la Frontera Sur, Unidad Campeche, Av Polígono s/n, Cd. Industrial, Lerma, Campeche, Mexico., van der Zee M; Wageningen Food & Biobased Research, Bornse Weilanden 9, 6708WG Wageningen, the Netherlands., Munhoz DR; Soil Physics and Land Management Group, Wageningen University & Research, Droevendaalsesteeg 3, 6708PB Wageningen, the Netherlands., Geissen V; Soil Physics and Land Management Group, Wageningen University & Research, Droevendaalsesteeg 3, 6708PB Wageningen, the Netherlands. |
| المصدر: | Journal of hazardous materials [J Hazard Mater] 2023 Apr 05; Vol. 447, pp. 130765. Date of Electronic Publication: 2023 Jan 09. |
| نوع المنشور: | Journal Article; Research Support, Non-U.S. Gov't |
| اللغة: | English |
| بيانات الدورية: | Publisher: Elsevier Country of Publication: Netherlands NLM ID: 9422688 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1873-3336 (Electronic) Linking ISSN: 03043894 NLM ISO Abbreviation: J Hazard Mater Subsets: MEDLINE |
| أسماء مطبوعة: | Original Publication: Amsterdam : Elsevier, |
| مواضيع طبية MeSH: | Oligochaeta* , Soil Pollutants*/toxicity , Soil Pollutants*/analysis, Animals ; Microplastics/toxicity ; Plastics ; Polyethylene ; Biodegradation, Environmental ; Soil ; Polyesters |
| مستخلص: | The accumulation of microplastics poses potential risks to soil health. Here, we did a preliminary exploration on the potential of Lumbricus terrestris (Oligochaeta) to reduce low-density polyethylene (LDPE), polylactic acid (PLA), and polybutylene adipate terephthalate (PBAT) microplastic (20-648 µm) contamination in soils. The ingestion of microplastics-contaminated soil (1% of microplastics, dw/dw) in a mesocosm system and the ingestion of pure microplastics in the Petri Dish by earthworms were studied. Results show that earthworms survived in the microplastics-contaminated soil (0% mortality in 35 days) but barely when exposed solely to microplastics (30-80% mortality in 4 days). Size-dependent ingestion of microplastics was not observed. The fragmentation of LDPE microplastics in the gizzard facilitated by soil was confirmed by the significantly increased ratio of small-sized (20-113 µm) microplastics from the bulk soil to the gut (from 8.4% to 18.8%). PLA and PBAT microplastics were fragmented by gizzard without the facilitation of soil, the ratios of small-sized (20-113 µm) PLA and PBAT microplastics in the gut were 55.5% and 108.2% higher than in respective pristine distributions. Substantial depolymerization of PLA (weight-average molar mass reduced by 17.7% with shift in molecular weight distribution) and suspected depolymerization of PBAT were observed in the worm gut, while no change in the molar mass was observed for PLA and PBAT microplastics buried in the soil for 49 days. Our results suggest that ingested microplastics could undergo fragmentation and depolymerization (for certain polymers) in the earthworm gut. Further research is needed to reveal the mechanisms of polymer depolymerization in the earthworm gut and to evaluate the feasibility of microplastic bioremediation with earthworms. Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. (Copyright © 2023 The Authors. Published by Elsevier B.V. All rights reserved.) |
| فهرسة مساهمة: | Keywords: Biodegradable plastics; Bioremediation; Depolymerization; Earthworm; Fragmentation; Microplastics |
| المشرفين على المادة: | 0 (Microplastics) 0 (Plastics) 9002-88-4 (Polyethylene) 0 (Soil Pollutants) 0 (Soil) 0 (Polyesters) |
| تواريخ الأحداث: | Date Created: 20230114 Date Completed: 20230207 Latest Revision: 20230207 |
| رمز التحديث: | 20240628 |
| DOI: | 10.1016/j.jhazmat.2023.130765 |
| PMID: | 36640504 |
| قاعدة البيانات: | MEDLINE |
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