Natural decrease of dissolved arsenic in a small stream receiving drainages of abandoned silver mines in Guanajuato, Mexico.
Bull Environ Contam Toxicol
; 91(5): 539-44, 2013 Nov.
Article
en En
| MEDLINE
| ID: mdl-23995851
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.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Arsénico
/
Contaminantes Químicos del Agua
/
Monitoreo del Ambiente
/
Ríos
/
Minería
País/Región como asunto:
Mexico
Idioma:
En
Revista:
Bull Environ Contam Toxicol
Año:
2013
Tipo del documento:
Article
País de afiliación:
México