Arsenic bioaccessibility in gold mine tailings of Delita, Cuba
Article
Article Title | Arsenic bioaccessibility in gold mine tailings of Delita, Cuba |
---|---|
ERA Journal ID | 4682 |
Article Category | Article |
Authors | Toujaguez, R. (Author), Ono, F. B. (Author), Martins, V. (Author), Cabrera, P. P. (Author), Blanco, A. V. (Author), Bundschuh, J. (Author) and Guilherme, L. R. G. (Author) |
Journal Title | Journal of Hazardous Materials |
Journal Citation | 262, pp. 1004-1013 |
Number of Pages | 10 |
Year | 2013 |
Publisher | Elsevier |
Place of Publication | Netherlands |
ISSN | 0304-3894 |
1873-3336 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.jhazmat.2013.01.045 |
Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S0304389413000630 |
Abstract | A bioaccessibility test was carried out in four tailings collected at a former mining area in Delita, Cuba. A previous risk assessment study identified arsenic (As) as the main critical contaminant in this area and showed that the tailings had high As concentrations (up to 3.5%). This study aimed at: (i) evaluating As bioaccessibility in four tailings (R1, R2, R3 and R4) from a gold mining area to obtain a better health risk estimate; and, (ii) identifying the mineral phases responsible for most of the bioaccessible As using XRD, SEM-EDS, and XAS. The results showed that bioaccessible As in the tailings ranged from 0.65 to 40.5%. The main factors influencing As bioaccessibility were a high occurrence of amorphous iron arsenate; occurrence, even at low content, of iron oxyhydroxides and stability of mineral phases in the environment of the gastrointestinal tract. Although arsenopyrite, arsenates and goethite were confirmed by mineralogical methods such as optical microscopy, XRD, and SEM-EDS, XAS showed that scorodite-oxidation state As(+V)- was dominant in most of the tailings. This confirms that the low bioaccessibility of As in most of the tailings is due to the slow kinetics of As release from scorodite. |
Keywords | amorphous Fe arsenate; arsenopyrite; in vitro test; scorodite; trace elements; XAS |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 410604. Soil chemistry and soil carbon sequestration (excl. carbon sequestration science) |
401905. Mining engineering | |
370599. Geology not elsewhere classified | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Federal University of Alagoas, Brazil |
Federal University of Lavras, Brazil | |
Institute for Geophysics and Astonomy, Cuba | |
National Centre for Engineering in Agriculture | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q223w/arsenic-bioaccessibility-in-gold-mine-tailings-of-delita-cuba
1765
total views11
total downloads1
views this month0
downloads this month