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Controls on stibnite precipitation at two New Zealand geothermal power stations

Title data

Wilson, Nathaniel ; Webster-Brown, Jenny ; Brown, Kevin:
Controls on stibnite precipitation at two New Zealand geothermal power stations.
In: Geothermics. Vol. 36 (2007) Issue 4 . - pp. 330-347.
ISSN 0375-6505
DOI: https://doi.org/10.1016/j.geothermics.2007.04.001

Abstract in another language

Stibnite (Sb2S3) forms in the heat-exchanger units of several New Zealand binary geothermal power stations. By analysing aqueous samples collected from two representative plants, it was determined that stibnite forms at a rate of 8.7 and 15.8 kg/day at the Rotokawa and Ngawha power stations, respectively. These results were compared to theoretical predictions of stibnite solubility. It was shown that pH change is the principal cause of stibnite deposition at Rotokawa, while at Ngawha the effect of temperature decrease is more significant. Antimony was not detected in vapour-line samples, suggesting that transport is completely within the aqueous phase.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER88562
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Professorship Environmental Geochemistry Group
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 08 May 2015 06:18
Last Modified: 08 May 2015 06:18
URI: https://eref.uni-bayreuth.de/id/eprint/13137