An investigation of mercury solidification and stabilization in portland cement using X-ray photoelectron spectroscopy and energy dispersive spectroscopy
✍ Scribed by Hylton G. McWhinney; David L. Cocke; Karl Balke; J. Dale Ortego
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 553 KB
- Volume
- 20
- Category
- Article
- ISSN
- 0008-8846
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✦ Synopsis
Portland cement doped with 10% by weight aqueous mercuric nitrate was investigated using XPS and EDS. Mercury does not exist as a strong surface specie. The final chemical state of the dopant is believed to be mercuric oxide (HgO). There is no evidence of chemical complexation of Hg in the cement matrix. On the other hand there is evidence of close association of calcium rich deposits with mercury. These calcium deposits show an apparent lack of silicate species when compared to the matrix components.
XPS results show that there is marked increase of carbonate content for the doped cement over the undoped cement.