Degradation of microplastic seed film-coating fragments in soil

Accinelli, Cesare; Abbas, Hamed K.; Shier, W. Thomas; Vicari, Alberto; Little, Nathan S.; Aloise, Maria Rosaria; Giacomini, Sara

doi:10.1016/j.chemosphere.2019.03.161

Cited by 67 publications

(28 citation statements)

References 25 publications

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“…Synthetic pigments are also used in pesticide-treated seed coatings. 30,31 The abrasion of such seed coatings may result in the detachment of plastic film fragments that enter the soil. Previous research found that the size of detached seed-coating fragments typically does not exceed 5 mm, with a thickness of less than 5-10 μm.…”

Section: Sources Of Microplastics In Soilsmentioning

confidence: 99%

“…Previous research found that the size of detached seed-coating fragments typically does not exceed 5 mm, with a thickness of less than 5-10 μm. 30,31 Accinelli et al 31 referred to them as microplastic coating film (MPCF) fragments. Although Accinelli et al 31 noticed that MPCF fragments could not persist in soils for long, their degradation rate varied depending on the coating composition.…”

Section: Sources Of Microplastics In Soilsmentioning

confidence: 99%

“…30,31 Accinelli et al 31 referred to them as microplastic coating film (MPCF) fragments. Although Accinelli et al 31 noticed that MPCF fragments could not persist in soils for long, their degradation rate varied depending on the coating composition. As a result, the fate of MP coatings in soils, such as their degradation process and corresponding mobility, remains uncharted.…”

Section: Sources Of Microplastics In Soilsmentioning

confidence: 99%

“…As a result, the fate of MP coatings in soils, such as their degradation process and corresponding mobility, remains uncharted. 30,31 Other potential input pathways of MPs in soils include littering, atmospheric input and street runoff ( Fig. 1).…”

Section: Sources Of Microplastics In Soilsmentioning

confidence: 99%

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Microplastics in soils: a review of possible sources, analytical methods and ecological impacts

Zhang

Yang

Chen

et al. 2020

J of Chemical Tech & Biotech

168

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Microplastics are emerging persistent pollutants that have been extensively detected in aqueous environments. Yet, scientists have little knowledge of microplastic pollution in soils. This study reviewed over 60 articles, with the following objectives: (i) to discuss sources and the global distribution of microplastics in soils; (ii) to evaluate current extraction techniques and analytical methods for microplastics in soils; and (iii) to comprehensively assess their adverse impacts on soils and soil organisms. Moreover, this review highlights the lack of research into microplastic contamination in soils as a significant knowledge gap. Research into the fate, sources and analytical techniques of soil microplastics and the interactions between soil organisms, soils and microplastics is essential in order to underpin management decisions aimed at safeguarding the ecological integrity of our soils.

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Section: Sources Of Microplastics In Soilsmentioning

confidence: 99%

Section: Sources Of Microplastics In Soilsmentioning

confidence: 99%

Section: Sources Of Microplastics In Soilsmentioning

confidence: 99%

Section: Sources Of Microplastics In Soilsmentioning

confidence: 99%

See 2 more Smart Citations

Microplastics in soils: a review of possible sources, analytical methods and ecological impacts

Zhang

Yang

Chen

et al. 2020

J of Chemical Tech & Biotech

168

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“…In order to couple chemical herbicide spraying and interspecific competition (coupled action), the coating must be not toxic and protect seeds at the initial stages of contact with toxic substances. At the same time, coating materials must allow seed-water contact to start germination and it must gradually degrade to facilitate sprouting and plant structures growth [26][27][28]. Consequently, some key factors influencing the effectiveness and to take in account for the selection and production of a material for seed coating are: (i) toxic effects on seeds of coating composition and processing; (ii) coatings thickness and mechanical properties (as it should not prevent the escape of the root system and sprout); (iii) its barrier effect against chemicals and water permeation (related both to coating defects and composition) and finally (iv) the coating degradation rate.…”

Section: Introductionmentioning

confidence: 99%

Cellulose Acetate and Cardanol Based Seed Coating for Intraspecific Weeding Coupled with Natural Herbicide Spraying

et al. 2020

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Agricultural pesticides can become persistent environmental pollutants and their use is destined to be reduced. Consequently, weed control is shifting to green products and strategies. A combined approach, made of pelargonic acid based herbicide spraying and interspecific competition (i.e. seeding of plants species competing for growth against weeds) could boost the weeding effect. In case of the contemporary seeding and spraying, needed to reduce costs, seed coating is necessary as barrier to herbicide toxic effects but, at the same time, the coating has to be endowed with the right features to allow germination. This work aims to verify the feasibility of using cellulose acetate/cardanol (CA/Card) as seed coating polymer–plasticizer blend and to identify possible relationship between material features and germination rate. For these purposes, untreated and pelargonic acid herbicide treated coated seeds coated through solvent evaporation methods (CA/Card ratios from 0/0 to 100/0) were subjected to germination test. Coatings were characterized through SEM, EDX, media uptake, DSC and mechanical analysis with and without conditioning in seeding conditions. Germination test showed that 70/30 seeds, treated and untreated with herbicide, presented the best germination rate. Germination assays showed that coating presence reduced and slowed (without stopping) seeds germination equally with and without herbicide treatment. Consequently, was possible to conclude that CA/Card coatings allowed germination and presented a barrier effect against herbicide. Thus coating resulted suitable for seed coating in herbicide spraying/interspecific combined applications. No strong correlations were found between material features and germination, but it is plausible to hypothesize that both water absorption and mechanical properties of the coating play an important role and have to be optimized to improve germination rate avoiding difficulty in sprouting. Finally, the study opened a new perspective in the use of cellulose acetate for seed coating from waste sources such as cigarette filters. Graphic Abstract

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Biodegradable Plastics

Kumar¹,

Razdan²

2022

Plastic and Microplastic in the Environment

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Degradation of microplastic seed film-coating fragments in soil

Cited by 67 publications

References 25 publications

Microplastics in soils: a review of possible sources, analytical methods and ecological impacts

Microplastics in soils: a review of possible sources, analytical methods and ecological impacts

Cellulose Acetate and Cardanol Based Seed Coating for Intraspecific Weeding Coupled with Natural Herbicide Spraying

Biodegradable Plastics

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