Table 5.
Content of heavy metals, mercury (Hg) and cadmium (Cd) in Nile tilapia (Oreochromis niloticus) fish organs (liver, intestine, gills and kidney) at the end of experiment (10 weeks), and the reducing effect of biosynthesized selenium nanoparticles (BioSeNPs).
| Group | Subgroups | Cd + Hg(μg ml−1) | BioSeNPs(μg ml−1) | Hg (μg g−1) | Cd (μg g−1) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Fish organs | |||||||||||
| Liver | Intestine | Gills | Kidney | Liver | Intestine | Gills | Kidney | ||||
| 1 | 1Z | – | -- | 0.02 g | 0.3e | 0.01 g | 0.1f | 0.04 g | 0.03f | 0.01f | 0.01e |
| 1A | – | 3 | ND | ND | ND | ND | ND | ND | ND | ND | |
| 1B | – | 4 | ND | ND | ND | ND | ND | ND | ND | ND | |
| 1C | – | 5 | ND | ND | ND | ND | ND | ND | ND | ND | |
| 2 | 2Z | 0.5 + 0.5 | – | 0.75d | 8.6bc | 0.69c | 2.55c | 1.5c | 3.85c | 0.5c | 0.62c |
| 2A | 0.5 + 0.5 | 3 | 0.56e | 3.2c | 0.49d | 1.89d | 1.1d | 2.4d | 0.23d | 0.46 cd | |
| 2B | 0.5 + 0.5 | 4 | 0.4ef | 3.0c | 0.32e | 1.5de | 0.98e | 2.1e | 0.16e | 0.27d | |
| 2C | 0.5 + 0.5 | 5 | 0.1f | 2.3d | 0.1f | 1.2e | 0.65f | 1.9e | 0.09f | 0.12e | |
| 3 | 3Z | 1.0 + 1.0 | -- | 1.9a | 16a | 1.7a | 7.9a | 3.5a | 8.4a | 1.1a | 1.4a |
| 3A | 1.0 + 1.0 | 3 | 1.5b | 10b | 1.4ab | 3.9b | 2.14b | 4.2b | 0.8b | 0.98b | |
| 3B | 1.0 + 1.0 | 4 | 1.1c | 8.9bc | 1.0b | 3.1bc | 1.87c | 3.7c | 0.5c | 0.7c | |
| 3C | 1.0 + 1.0 | 5 | 0.8d | 5.8c | 0.5d | 2.3c | 1.5c | 2.6d | 0.3c | 0.5 cd | |
Means in the same column with lowercase different letters are significantly different at p ≤ 0.05.