Bioaccumulation kinetic parameters and sizes of apparent accumulation reservoirs for nanoplastic (present study) and microplastic (remodelled from Redondo-Hasselerharm et al. 2018)46 in Gammarus pulex.
| Parametera | Nanoplastic | Microplastic | Unit |
|---|---|---|---|
| Uptake rate constant (kup) | 0.076 (0.073–0.078) | 0.044 (0.038–0.049) | μg × kg−1 biota/μg × kg−1 sediment × day−1 |
| Elimination rate constant (kelim) | 2.44 (2.30–2.59) | 4.61 (2.59–22.1) | Day−1 |
| Irreversible (stored) fraction (FB) | 0.96 (0.87–1.04) | 2.79 (2.37–3.20) | % |
| TTFBODYb | 0.020 | 0.092 | [mg kg−1 organism]/[mg kg−1 sediment] |
| TTFGUT | 0.031 | 0.025 | [mg kg−1 organism]/[mg kg−1 sediment] |
| TTFTOTALb | 0.051 | 0.116 | [mg kg−1 organism]/[mg kg−1 sediment] |
| Percentage in bodyb | 39.8 | 78.7 | % |
| Percentage in gutb | 60.2 | 21.3 | % |
a
Ranges relate to 95% confidence intervals.
b
These TTF values and percentages are conditional; they depend on exposure time.