期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 715, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2020.136924
关键词
Plastics; Pressurized liquid extraction; Double-shot Pyr-GC/MS; Quantification; Sewage sludge; Biosolids
资金
- Queensland Alliance for Environmental Health Sciences (QAEHS)
- University of Queensland
- University of Exeter
- Queensland Department of Health
- QUEX PhD scholarship
The identification and quantification of selected plastics (polystyrene (PS), polycarbonate (PC), poly-(methyl methacrylate) (PMMA), polypropylene (PP), polyethylene terephthalate (PET), polyethylene (PE) and polyvinyl chloride (PVC)) in biosolids (treated sewage sludge) was performed by pressurized liquid extraction (PLE) combined with double-shot pyrolysis gas chromatography-mass spectrometry. Validation of the method yielded recoveries of between 85 and 128% (mean RSD 11%) at a linear range of between 0.01 and 2 mu g. The distribution of plastics within 25 biosolid samples from a single wastewater treatment plant in Australia was assessed. The mass concentration of PE, PVC, PP, PS and PMMA was between 0.1 and 4.1 mg/g dry weight (dw) across all with a total plastic concentration Sigma(Plastics) of between 2.8 and 6.6 mg/g dw (median = 4.1 mg/g dw). PE was the predominant plastic detected (mean concentration of 22 mg/g dw), contributing to 50% of the total of all plastics. Overall, this study demonstrates that pressurized liquid extraction (PLE) combined with double-shot pyrolysis gas chromatography-mass spectrometry can be used to identify and quantify PE, PP, PVC, PS, and PMMA in biosolids. (C) 2020 Elsevier B.V. All rights reserved.
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