TY - JOUR
T1 - Arsenic and heavy metals in native plants at tailings impoundments in Queretaro, Mexico
AU - Santos-Jallath, José
AU - Castro-Rodríguez, Alejandrina
AU - Huezo-Casillas, José
AU - Torres-Bustillos, Luis
N1 - Funding Information:
This study was conducted as part of Project Support Program for Research and Technological Innovation PAPIIT IN109808 from the Universidad Nacional Autonoma de Mexico. We thank the collaboration of Veronica Juarez and Rafael Torres (Biology Institute, UNAM) in the identification of plants, Guadalupe Urquiza (Engineering Institute, UNAM) for their support in chemical analysis, Geovanni Rodríguez and Sayuri Katagiri in the field and laboratory work.
PY - 2012
Y1 - 2012
N2 - Ten native plants species that grow in three tailings dams from Ag, Pb, Cu and Zn mine in Queretaro, Mexico were studied. Total concentrations in tailings were 183-14,660. mg/kg. As, 45-308. mg/kg. Cd, 327-1754. mg/kg. Pb, 149-459. mg/kg. Cu and 448-505. mg/kg. Zn. In the three tailings dams, the solubility of these elements is low. Tailings in dam 1 are acid generating while tailings in dams 2 and 3 are not acid-generating potential. Plants species that accumulate arsenic and heavy metals was identified; Nicotina glauca generally presented the highest concentrations (92. mg/kg. As, 106. mg/kg. Cd, 189. mg/kg. Pb, 95. mg/kg. Cu and 1985. mg/kg. Zn). Other species that accumulate these elements are Flaveria pubescens, Tecoma stans, Prosopis Sp, Casuarina Sp and Maurandia antirrhiniflora. Two species were found that accumulates a large amount of metals in the root, Cenchrus ciliaris and Opuntia lasiacantha. Concentrations in soils in which plants grow were 488-5990. mg/kg. As, 5-129. mg/kg. Cd, 169-3638. mg/kg. Pb, 159-1254. mg/kg. Cu and 1431-13,488. mg/kg. Zn. The Accumulation Factor (AF) determined for plants was less than 1, with exception of N. glauca for Cd. The correlation between arsenic and heavy metals found in soils and plants was low. Knowledge of plant characteristics allows it use in planning the reforestation of tailings dams in controlled manner. This will reduce the risk of potentially toxic elements are integrated into the food chain of animal species.
AB - Ten native plants species that grow in three tailings dams from Ag, Pb, Cu and Zn mine in Queretaro, Mexico were studied. Total concentrations in tailings were 183-14,660. mg/kg. As, 45-308. mg/kg. Cd, 327-1754. mg/kg. Pb, 149-459. mg/kg. Cu and 448-505. mg/kg. Zn. In the three tailings dams, the solubility of these elements is low. Tailings in dam 1 are acid generating while tailings in dams 2 and 3 are not acid-generating potential. Plants species that accumulate arsenic and heavy metals was identified; Nicotina glauca generally presented the highest concentrations (92. mg/kg. As, 106. mg/kg. Cd, 189. mg/kg. Pb, 95. mg/kg. Cu and 1985. mg/kg. Zn). Other species that accumulate these elements are Flaveria pubescens, Tecoma stans, Prosopis Sp, Casuarina Sp and Maurandia antirrhiniflora. Two species were found that accumulates a large amount of metals in the root, Cenchrus ciliaris and Opuntia lasiacantha. Concentrations in soils in which plants grow were 488-5990. mg/kg. As, 5-129. mg/kg. Cd, 169-3638. mg/kg. Pb, 159-1254. mg/kg. Cu and 1431-13,488. mg/kg. Zn. The Accumulation Factor (AF) determined for plants was less than 1, with exception of N. glauca for Cd. The correlation between arsenic and heavy metals found in soils and plants was low. Knowledge of plant characteristics allows it use in planning the reforestation of tailings dams in controlled manner. This will reduce the risk of potentially toxic elements are integrated into the food chain of animal species.
KW - Arsenic
KW - Heavy metals
KW - Native plants
KW - Phytoremediation
KW - Phytostabilization
KW - Tailings
UR - http://www.scopus.com/inward/record.url?scp=84857685065&partnerID=8YFLogxK
U2 - 10.1016/j.pce.2011.12.002
DO - 10.1016/j.pce.2011.12.002
M3 - Artículo
SN - 1474-7065
VL - 37-39
SP - 10
EP - 17
JO - Physics and Chemistry of the Earth
JF - Physics and Chemistry of the Earth
ER -