Table 3 Elemental composition of the surface, established using XPS.
From: Adsorption of organic contaminants of emerging concern using microalgae-derived hydrochars
Sample | C (at%) | O (at%) | N (at%) | Ca (at%) | P (at%) | Si (at%) | Al (at%) | Mg (at%) | Fe (at%) |
|---|---|---|---|---|---|---|---|---|---|
Initial | 68.2 | 24.8 | 4.5 | 1.0 | 0.6 | 0.6 | 0.3 | – | – |
180 °C | 57.7 | 28.9 | 4.7 | 1.3 | 1.1 | 2.8 | 1.3 | 0.9 | 1.3 |
220 °C | 59.1 | 27.4 | 4.01 | 0.6 | 0.5 | 3.7 | 1.6 | 1.4 | 1.6 |
260 °C | 54.3 | 29.3 | 3.5 | 0.8 | 0.8 | 5.1 | 2.0 | 2 | 2.2 |
