Persistence in soil of microplastic films from ultra-thin compostable plastic bags and implications on soil Aspergillus flavus population
| Autor: | Cesare Accinelli, Alberto Vicari, Veronica Bruno, Nacer Bellaloui, Lorenzo Nissen, Nathan S. Little, Hamed K. Abbas, W. Thomas Shier |
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| Přispěvatelé: | Accinelli, Cesare, Abbas, Hamed K., Bruno, Veronica, Nissen, Lorenzo, Vicari, Alberto, Bellaloui, Nacer, Little, Nathan S., Thomas Shier, W. |
| Rok vydání: | 2020 |
| Předmět: |
Microplastics
020209 energy Population Aspergillus flavus Biodegradable Plastics 02 engineering and technology 010501 environmental sciences engineering.material complex mixtures 01 natural sciences Persistence (computer science) Soil 0202 electrical engineering electronic engineering information engineering education Waste Management and Disposal Soil Microbiology 0105 earth and related environmental sciences Plastic bag education.field_of_study biology Compost food and beverages biology.organism_classification Plastic Compostable plastic Compost Microplastic Aspergillus flavus Aflatoxins Agronomy Compostable Plastics Soil water Litter engineering Environmental science |
| Zdroj: | Waste Management. 113:312-318 |
| ISSN: | 0956-053X |
| DOI: | 10.1016/j.wasman.2020.06.011 |
| Popis: | An increasing number of states and municipalities are choosing to reduce plastic litter by replacing plastic items, particularly single-use ones, with same-use products manufactured from compostable plastics. This study investigated the formation and persistence of compostable film microplastic particles (CFMPs) from ultra-thin compostable carrier bags in soil under laboratory conditions, and the potential impact of CFMPs on Aspergillus flavus populations in the soil. During a 12-month incubation period, compostable film samples in soils with small, medium or large populations of indigenous A. flavus, underwent 5.9, 9.8, and 17.1% reduction in total surface area, respectively. Despite the low levels of deterioration, the number of CFMPs released increased steadily over the incubation period, particularly fragments with size < 0.05 mm. Up to 88.4% of the released fragments had associated A. flavus and up to 68% of isolates from CFMPs produced aflatoxins. A. flavus levels associated with CFMPs increased rapidly during the initial part of the 12-month incubation period, whereas the percent aflatoxigenicity continued to increase even after A. flavus density leveled off later. During 12 months incubation, A. flavus DNA amounts recovered from CFMPs increased in soils with all levels of indigenous A. flavus, with the largest increases (119.1%) occurring in soil containing the lowest indigenous A. flavus. These results suggest that burying compostable film in soil, or application of compost containing CFMPs, may reduce soil quality and increase risk of adverse impacts from elevated aflatoxigenic A. flavus populations in soil. |
| Databáze: | OpenAIRE |
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