Publication Date:
2008-02-01
Description:
A survey of the surface-area-normalized dissolution rates of major phosphate bearing minerals shows these rates to vary by 〉8 orders of magnitude with a general dissolution-rate trend sturvite 〉 britholite ∼ fluoroapatite 〉 variscite 〉 monazite ∼ rhabdophane. This trend reflects the relative strength of the metal-oxygen bonds holding together the phosphate tetrahedra in the mineral structure. Due to the high surface-area-normalized reactivity of fluoroapatite, and the high surface area of natural variscite and rhabdophane, it seems likely that these minerals buffer the concentration of P and the rare-earth elements in many natural waters. As such, the solubility of these minerals plays a significant role in the global phosphorus cycle, and may potentially provide clues for future sustainable phosphorus use.
Print ISSN:
0026-461X
Electronic ISSN:
1471-8022
Topics:
Geosciences