Microplastics in municipal mixed-waste organic outputs induce minimal short to long-term toxicity in key terrestrial biota.

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ID: 45376
2019
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Ranked #15 of 145 articles by views in Environmental pollution (Barking, Essex : 1987)

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Abstract
Sustainable alternatives to landfill disposal for municipal mixed wastes represents a major challenge to governments and waste management industries. In the state of New South Wales (NSW) Australia, mechanical biological treatment (MBT) is being used to reduce the volume and pathogen content of organic matter isolated from municipal waste. The product of this treatment, a compost-like output (CLO) referred to as mixed waste organic output (MWOO), is being recycled and applied as a soil amendment. However, the presence of contaminants in MWOO including trace organics, trace metals and physical contaminants such as microplastic fragments has raised concerns about potential negative effects on soil health and agriculture following land application. Here, we used multiple lines of evidence to examine the effects of land application of MWOO containing microplastics in three soils to a variety of terrestrial biota. Treatments included unamended soil, MWOO-amended soil and MWOO-amended soil into which additional high-density polyethylene (HDPE), polyethylene terephthalate (PET), or polyvinyl chloride (PVC) microplastics were added. Tests were conducted in soil media that had been incubated for 0, 3 or 9 months. Addition of microplastics had no significant negative effect on wheat seedling emergence, wheat biomass production, earthworm growth, mortality or avoidance behaviour and nematode mortality or reproduction compared to controls. There was also little evidence the microplastics affected microbial community diversity, although measurements of microbial community structure were highly variable with no clear trends.
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judy2019microplasticsenvironmental Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Judy, Jonathan D;Williams, Mike;Gregg, Adrienne;Oliver, Danni;Kumar, Anu;Kookana, Rai;Kirby, Jason K;
Journal Environmental pollution (Barking, Essex : 1987)
Year 2019
DOI
S0269-7491(18)35332-6
URL
Keywords
waste management microplastics ecosystem health sustainability ecotoxicology terrestrial

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