Arsenic and heavy metals in native plants at tailings impoundments in Queretaro,Mexico |
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| Affiliation: | 1. Department of Mining and Metallurgy, Faculty of Engineering, Universidad Nacional Autónoma de Mexico, Circuito Escolar, Ciudad Universitaria, México, D.F. 04360, Mexico;2. Soils and Aquifers Cleanup Group, Institute of Engineering, Universidad Nacional Autonoma de Mexico, Circuito Escolar, Ciudad Universitaria, México, D.F. 04360, Mexico;3. Professional Interdisciplinary Biotechnology Unit, Instituto Politecnico Nacional, Av. Acueducto s/n Col. Ticomán, México, D.F. 07340, Mexico;1. Physics Department, University of Ioannina, Ioannina 45110, Greece;2. Regional Centre of Advanced Technologies and Materials, Faculty of Science, Department of Physical Chemistry and Experimental Physics, Palacky University in Olomouc, 77146, Czech Republic;3. Department of Materials Science and Engineering, University of Ioannina, Ioannina 45110, Greece;1. Instituto de Investigación Sanitaria de Navarra (IdiSNA), Pamplona, Spain;2. Servicio de Microbiología Clínica, Complejo Hospitalario de Navarra, Pamplona, Spain;1. College of Animal Science and Technology, Guangxi University, No.100 East Daxue Road, Nanning, Guangxi 530004, China;2. Institute of Military Veterinary, Academy of Military Medical Sciences, Changchun 130122, China;3. Guangxi Center for Animal Disease Control and Prevention, No. 51 North You’ai Road, Nanning, Guangxi 530001, China;4. Institute of Special Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, Changchun, 130122, China;5. Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, China;1. Fuli Institute of Food Science, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang R & D Center for Food Technology and Equipment, Department of Food Science and Nutrition, Zhejiang University, Hangzhou 310058, China;2. Department of Nutrition and Food Safety, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310006, China;1. Departamento de Química, Instituto Nacional de Investigaciones Nucleares, Carr. México-Toluca S/N, La Marquesa, Ocoyoacac, Estado de México, C.P. 52750, Mexico;2. Instituto de Ciencias del mar y limnología, UNAM, Calz. Joel Montes Camarena S/N, Mazatlan, Sinaloa, C.P. 82040, Mexico |
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| Abstract: | 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. |
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