International Journal of Interdisciplinary Research
Table 2 Various metal ions in recycled PET and their origins (Richard et al. 1992)
From: Poly (ethylene terephthalate) recycling for high value added textiles
Metal ions | Concentration(ppm) | Origin |
|---|---|---|
Sb | 220-240 | Polycondensation catalyst |
Co | 50-100 | Polycondensation catalyst |
Mn | 20-60 | Transesterification catalyst |
Ti | 0-80 | Polycondensation catalyst |
Fe | 0-6 | Incorporated during washing |
Na, Mg, Si | - | Food additives |