Table 3 Detected PET mass contents in environmental samples using PET extraction and TED-GC/MS
Environmental sample | PET extraction | TED-GC/MS | ||
|---|---|---|---|---|
Sample weight/mg | Mass content/mg kg−1 | Sample weight/mg | Mass content/mg kg−1 | |
Beach sediment, 1. extraction | 50,000 | Below LOD | – | – |
Beach sediment, 2. extraction | 50,000 | Below LOD | – | – |
Agriculture soil, 1. extraction | 20,000 | Below LOQ | – | – |
Agriculture soil, 2. extraction | 20,000 | Below LOQ | – | – |
Compost A | 5000 | 81.5 | 21.3 | Below LOD |
Compost B | 5000 | Below LOQ | 23.9 | Below LOD |
Compost C | 5000 | 102 | 22.1 | Below LOD |
Fermentation residue A | 3000 | 777 | 20.4 | Below LOD |
Fermentation residue B | 3000 | 210 | 20.7 | Below LOD |
Fermentation residue C | 3000 | 475 | 20.5 | Below LOD |
Particles of WWTP effluent | 5000 | 38.6 | 14.9 | Below LOD |
Filter residue of greywater | 500 | 1430 | 9.87 | Below LOQ |
Sewage sludge, 1. extraction | 10,000 | 98.7 | – | – |
Sewage sludge, 2. extraction | 10,000 | 142 | – | – |
Dust sample A | 276 | 12,500 | 6.11 | 7100 |
Dust sample B | 149 | 43,600 | 8.23 | 57,000 |