Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The average content (wt%) of the main impurity elements in the biodeposits.
| Component | Type of Biodeposit | |||
|---|---|---|---|---|
| I | II | III | IV | |
| Na2O | 2.0 1 | 3.0 1 | 1.7 1 | 1.5 1 |
| MgO | 10.2 1 | 4.0 1 | 3.8 1 | 1.9 1 |
| Al2O3 | 10.9 1 | 16.6 1 | 11.2 1 | 8.5 1 |
| SiO2 | 12.3 2 | 11.1 2 | 29.4 3 | 50.6 3 |
| K2O | 7.6 1 | 8.0 1 | 3.9 1 | 2.1 1 |
| CaO | 1.1 2 | 3.0 2 | 4.1 3 | 4.8 3 |
| TiO2 | 0.9 1 | 1.8 1 | 0.9 1 | 0.6 1 |
| MnO | 0.1 1 | 0.2 1 | 0.1 1 | 0.1 1 |
| FeO | 2.3 2 | 1.5 2 | 8.7 3 | 4.5 3 |
Notes: 1 ICP analysis; 2 Electron probe microanalysis; 3 X-ray fluorescence analysis.
