Table 1.
Number of peer-reviewed papers for selected metal oxides found in ISI Web of Science for years 1980-2008. Combinations of key-words comprising “nano*”, “toxic*” and “ecotoxic*” inserted for the search in “topic” were used as indicated in Table 1. Search was performed on 4.07.2008.
| Metal oxide | Number of papers | Organisms | ||
|---|---|---|---|---|
|
| ||||
| +nano* | +nano* | +nano* | ||
| +toxic* | +ecotoxic* | |||
|
| ||||
| TiO2 | 12390 | 114 | 6 | Bacteria, fungi, crustaceans, microalgae, fish, plants |
| ZnO | 6314 | 21 | 3 | Bacteria, crustaceans |
| CuO | 914 | 4 | 1 | Bacteria, crustaceans |
| Al2O3 | 5504 | 14 | 1 | Fish embryos |
| SiO2 | 10027 | 29 | 1 | Text concerns occupational health and safety problems |
| Fe2O3 | 2627 | 20 | 0 | |
| ZrO2 | 2599 | 9 | 0 | |