Table 5.
XPS semi-quantitative analysis of the cement samples.
| Sample | Concentration of Chromium Species (%) | |
|---|---|---|
| Cr(III) | Cr(VI) | |
| OPC1 | 68.09 | 31.91 |
| OPC2 | 68.44 | 31.56 |
| OPC3 | 76.94 | 23.06 |
| OPC4 | 69.35 | 30.65 |
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