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Title

A Raman spectral study of stream waters and efflorescent salts in Rio Tinto, Spain

AuthorsSobrón, Pablo ; Sanz-Arranz, Aurelio; Acosta, Tayro; Rull, Fernando
KeywordsRaman spectroscopy
Sulfate
Iron
Environmental
Issue DateJan-2009
PublisherElsevier
CitationSpectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 71(5): 1678-1682 (2009)
AbstractAcidic waters and sulfate-rich precipitates are found in mine tailings such as Rio Tinto (Huelva, SW, Spain). In this work we have characterized the chemical constituents of stream water and have identified some efflorescent salts and precipitates by means of Raman spectroscopy. Variable amounts of sulfate and bisulfate are found in the aqueous samples, suggesting changes in the acidity of the solutions. An estimation of the sulfate/water relative abundance is also given. Solid samples are readily identified as gypsum and as mixtures of hydrated hydroxysulfates belonging to the copiapite group. These results are consistent with previous works reporting the mineralogy and water composition of acid mine drainage-related sites, and proves the importance of Raman spectroscopy as a tool for accurate and noninvasive analyses of acid waters and associated geochemistry.
Description5 pages, 6 figures.-- PMID: 18692432 [PubMed].-- Available online Jul 9, 2008.
Publisher version (URL)http://dx.doi.org/10.1016/j.saa.2008.06.035
URIhttp://hdl.handle.net/10261/13039
DOI10.1016/j.saa.2008.06.035
ISSN1386-1425
Appears in Collections:(CAB) Artículos
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