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Updated: May 8, 2026

Integrated Field Lysimetry and Porewater Sampling for Evaluation of Chemical Mobility in Soils and Established Vegetation
Published on: July 4, 2014
Natural decrease of dissolved arsenic in a small stream receiving drainages of abandoned silver mines in Guanajuato,
Yann Rene Ramos Arroyo1, Alma Hortensia Serafín Muñoz, Eunice Yanez Barrientos
1Department of Geomatic and Hydraulic Engineering, University of Guanajuato, L de Retana 5, 36000, Guanajuato, Mexico.
Abstract:
Arsenic release from the abandoned mines and its fate in a local stream were studied. Physicochemical parameters, metals/metalloids and arsenic species were determined. One of the mine drainages was found as a point source of contamination with 309 μg L(-1) of dissolved arsenic; this concentration declined rapidly to 10.5 μg L(-1) about 2 km downstream. Data analysis confirmed that oxidation of As(III) released from the primary sulfide minerals was favored by the increase of pH and oxidation reduction potential; the results obtained in multivariate approach indicated that self-purification of water was due to association of As(V) with secondary solid phase containing Fe, Mn, Ca.
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