4.8 Article

Plastics in biosolids from 1950 to 2016: A function of global plastic production and consumption

期刊

WATER RESEARCH
卷 201, 期 -, 页码 -

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2021.117367

关键词

Plastics; Sewage sludge; Biosolids; WWTPs; Plastic production; Quantification; Pyr-GC; MS

资金

  1. Research Training Scholarship - Queensland Alliance for Environmental Health Sciences (QAEHS), The University of Queensland
  2. QAEHS Research Higher Degree Top-Up Scholarship
  3. University of Queensland Research Training Scholarship
  4. QUEX PhD scholarship of The University of Queensland
  5. QUEX PhD scholarship of University of Exeter
  6. Queensland Alliance for Environmental Health Sciences, The University of Queensland

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The study found a correlation between the concentration of plastics in treated sewage sludge and plastic production estimates, indicating a potential link between plastics production, consumption, and leakage into the environment. Prior to the 1990s, there was limited plastic leakage into biosolids, except for polystyrene, but increased leakage was observed from the 1990s onwards.
Plastics are ubiquitous contaminants that leak into the environment from multiple pathways including the use of treated sewage sludge (biosolids). Seven common plastics (polymers) were quantified in the solid fraction of archived biosolids samples from Australia and the United Kingdom from between 1950 and 2016. Six plastics were detected, with increasing concentrations observed over time for each plastic. Biosolids plastic concentrations correlated with plastic production estimates, implying a potential link between plastics production, consumption and leakage into the environment. Prior to the 1990s, the leakage of plastics into biosolids was limited except for polystyrene. Increased leakage was observed from the 1990s onwards; potentially driven by increased consumption of polyethylene, polyethylene terephthalate and polyvinyl chloride. We show that looking back in time along specific plastic pollution pathways may help unravel the potential sources of plastics leakage into the environment and provide quantitative evidence to support the development of source control interventions or regulations.

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