Environmental and genetic effects on production traits of ewes originally from distinct environments
Oliveira, Nelson Manzonil de
1993
Potential toxic elements in stream sediments, soils and waters in an abandoned radium mine (central Portugal)
Type
article
Creator
Publisher
Identifier
ANTUNES, I. M. H. R. [et al.] (2017) - Potential toxic elements in stream sediments, soils and waters in an abandoned radium mine (central Portugal). Environmental Geochemistry and Health. ISSN 1573-2983. Doi:10.1007/s10653-017-9945-2
0269-4042
Title
Potential toxic elements in stream sediments, soils and waters in an abandoned radium mine (central Portugal)
Subject
Radium mines
Enrichment factor
Contamination
Remediation
Central Portugal
Enrichment factor
Contamination
Remediation
Central Portugal
Date
2017-04-27T11:34:17Z
2017-04-27T11:34:17Z
2017
2017-04-27T11:34:17Z
2017
Description
The final publication is available at Springer via http://dx.doi.org/10.1007/s10653-017-9945-2
The Alto da Várzea radium mine (AV) exploited ore and U-bearing minerals, such as autunite and torbernite. The mine was exploited underground from 1911 to 1922, closed in 1946 without restoration, and actually a commercial area is deployed. Stream sediments, soils and water samples were collected between 2008 and 2009. Stream sediments are mainly contaminated in As, Th, U and W, which is related to the AV radium mine. The PTEs, As, Co, Cr, Sr, Th, U, W, Zn, and electrical conductivity reached the highest values in soils collected inside the mine influence. Soils are contaminated with As and U and must not be used for any purpose. Most waters have pH values ranging from 4.3 to 6.8 and are poorly mineralized (EC = 41–186 µS/cm; TDS = 33–172 mg/L). Groundwater contains the highest Cu, Cr and Pb contents. Arsenic occurs predominantly as H2(AsO4)− and H(AsO4)2−. Waters are saturated in goethite, haematite and some of them also in lepidocrocite and ferrihydrite, which adsorbs As (V). Lead is divalent in waters collected during the warm season, being mobile in these waters. Thorium occurs mainly as Th(OH)3(CO3)−, Th(OH)2(CO3) and Th(OH)2(CO3)22−, which increase water Th contents. Uranium occurs predominantly as UO2CO3, but CaUO2(CO3)32− and CaUO2(CO3)3 also occur, decreasing its mobility in water. The waters are contaminated in NO2−, Mn, Cu, As, Pb and U and must not be used for human consumption and in agricultural activities. The water contamination is mainly associated with the old radium mine and human activities. A restoration of the mining area with PTE monitoring is necessary to avoid a public hazard
info:eu-repo/semantics/publishedVersion
The Alto da Várzea radium mine (AV) exploited ore and U-bearing minerals, such as autunite and torbernite. The mine was exploited underground from 1911 to 1922, closed in 1946 without restoration, and actually a commercial area is deployed. Stream sediments, soils and water samples were collected between 2008 and 2009. Stream sediments are mainly contaminated in As, Th, U and W, which is related to the AV radium mine. The PTEs, As, Co, Cr, Sr, Th, U, W, Zn, and electrical conductivity reached the highest values in soils collected inside the mine influence. Soils are contaminated with As and U and must not be used for any purpose. Most waters have pH values ranging from 4.3 to 6.8 and are poorly mineralized (EC = 41–186 µS/cm; TDS = 33–172 mg/L). Groundwater contains the highest Cu, Cr and Pb contents. Arsenic occurs predominantly as H2(AsO4)− and H(AsO4)2−. Waters are saturated in goethite, haematite and some of them also in lepidocrocite and ferrihydrite, which adsorbs As (V). Lead is divalent in waters collected during the warm season, being mobile in these waters. Thorium occurs mainly as Th(OH)3(CO3)−, Th(OH)2(CO3) and Th(OH)2(CO3)22−, which increase water Th contents. Uranium occurs predominantly as UO2CO3, but CaUO2(CO3)32− and CaUO2(CO3)3 also occur, decreasing its mobility in water. The waters are contaminated in NO2−, Mn, Cu, As, Pb and U and must not be used for human consumption and in agricultural activities. The water contamination is mainly associated with the old radium mine and human activities. A restoration of the mining area with PTE monitoring is necessary to avoid a public hazard
info:eu-repo/semantics/publishedVersion
Access restrictions
restrictedAccess
http://creativecommons.org/licenses/by/4.0/
http://creativecommons.org/licenses/by/4.0/
Language
eng
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