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An Assessment of the Metal Removal Capability of Endemic Chilean Species

Journal
International Journal of Environmental Research and Public Health
Date Issued
2022-03-01
Author(s)
Lazo, Andrea  
Departamento de Ingeniería Química y Ambiental  
Lazo, Pamela
Urtubia Urbina, Alejandra Pamela  
Departamento de Ingeniería Química y Ambiental  
Lobos, María Gabriela
Hansen, Henrik K.
Departamento de Ingeniería Química y Ambiental  
Gutiérrez, Claudia
Departamento de Ingeniería Química y Ambiental  
DOI
10.3390/ijerph19063583
Abstract
<jats:p>In Chile, there are several abandoned mine tailing impoundments near population centers that need to be remediated. In this study, the ability of Oxalis gigantea, Cistanthe grandiflora, and Puya berteroniana to remove Zn, Ni, and Cr from mine tailings was evaluated. The plants’ removal efficiency, bioconcentration, and translocation factors regarding these metals were determined to assess the ability of certain endemic species from Northern and Central Chile to extract or stabilize metals. After a period of seven months, the chemical analysis of plants and tailings, together with the statistical treatment of data, indicated the inability of all the species to translocate Ni, Cr, or Zn with a translocation factor lower than one. The results showed the stabilizing character of Oxalis gigantea, Puya berteroniana, and Cistanthe grandiflora for Zn, with a bioconcentration factor close to 1.2 in all cases, and the same ability of the latter two species for Cr, with a bioconcentration factor of 1.5 in the case of Cistanthe grandiflora and 1.7 for Puya berteroniana. Finally, a removal efficiency of 9.3% was obtained with Cistanthe grandiflora for Cr and 15% for Ni; values lower than 6.4% were obtained for Zn in all cases. Improvements in the process should be sought to enhance the performance of these species for the accumulation of the target metals.</jats:p>
Subjects

mine tailings

endemic plants

metals

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ijerph-19-03583-v2.pdf

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2.42 MB

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Checksum

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