Table 2.
Colloidal characterization of ENM used in this study
| Sample |
d
H
(nm) |
D
32
(nm) |
PdI | ζ (mV) |
σ (mS/cm) |
pH |
|---|---|---|---|---|---|---|
| Fe2O3 in water | 108.3 ± 1.1 | – | 0.199 ± 0.007 | −27.2 ± 0.4 | 0.03 ± 0.00 | 6.05 |
| Emulsion | 191.7 ± 2.2 | 138 ± 1 | 0.190 ± 0.019 | −33.6 ± 1.3 | 0.81 ± 0.00 | 6.97 |
| Emulsion + Fe2O3 | 200.7 ± 4.1 | 132 ± 3 | 0.243 ± 0.007 | −36.3 ± 0.6 | 0.80 ± 0.01 | 6.94 |
| Mouth digesta | 365.4 ± 20.3 | 295 ± 9 | 0.489 ± 0.096 | −23.0 ± 0.8 | 1.04 ± 0.03 | 6.66 |
| Mouth digesta + Fe2O3 | 472.3 ± 4.3 | 270 ± 8 | 0.768 ± 0.008 | −23.7 ± 1.1 | 1.03 ± 0.3 | 6.76 |
| Stomach digesta | 272.4 ± 5.9 | 29,967 ± 1254 | 0.354 ± 0.052 | 0.7 ± 0.5 | 1.49 ± 0.07 | 1.64 |
| Stomach digesta + Fe2O3 | 332.2 ± 17.3 | 25,490 ± 550 | 0.541 ± 0.073 | 1.4 ± 0.2 | 1.40 ± 0.14 | 1.52 |
| Sm. Int digesta | 227.5 ± 1.7 | 1175 ± 182 | 0.322 ± 0.030 | −55.2 ± 3.7 | 1.05 ± 0.03 | 7.02 |
| Sm. Int digesta + Fe2O3 | 335.5 ± 0.7 | 491 ± 52 | 0.513 ± 0.015 | −47.6 ± 1.7 | 1.08 ± 0.04 | 6.98 |
| Sm. Int. digesta 1:3 D + F | 1736.7 ± 160.9 | 405 ± 40 | 0.390 ± 0.130 | −16.5 ± 1.1 | 2.23 ± 0.10 | 7.13 |
| Sm. Int. digesta + Fe2O3, 1:3 D + F | 1867.7 ± 144.3 | 336 ± 62 | 0.373 ± 0.023 | −16.3 ± 1.6 | 2.29 ± 0.15 | 7.03 |
| Sm. Int digesta 1:3 D-F | 242.4 ± 1.7 | 347 ± 8 | 0.322 ± 0.040 | −27.2 ± 1.4 | 2.17 ± 0.10 | 7.07 |
| Sm. Int digesta + Fe2O3,1:3 D-F | 394.2 ± 2.5 | 307 ± 52 | 0.536 ± 0.012 | −24.9 ± 3.2 | 2.35 ± 0.14 | 7.10 |
d H intensity-weighted mean hydrodynamic diameter by DLS, D 32 surface-weighted mean diameter by laser diffraction, PdI polydispersity index, ζ zeta potential, σ specific conductance