Comprehensive study of electrokinetic-assisted phytoextraction of metals from mine tailings by applying direct and alternate current
Electrokinetic-assisted phytoextraction (EKPH) involves the use of electric current to improve the mobilization of metals in soils and, therefore, their removal efficiency. It emerges as an interesting sustainable technology for the rehabilitation of abandoned mining areas. The goal of this research...
| Autores: | , , , , |
|---|---|
| Tipo de documento: | artigo |
| Data de publicação: | 2023 |
| País: | España |
| Recursos: | Universidad de Castilla-La Mancha |
| Repositório: | RUIdeRA. Repositorio Institucional de la UCLM |
| OAI Identifier: | oai:ruidera.uclm.es:10578/30694 |
| Acesso em linha: | https://doi.org/10.1016/j.electacta.2023.142051 https://hdl.handle.net/10578/30694 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Metals Electrokinetic-assisted phytoextraction Mine tailings Ryegrass DC current AC current Metales Fitoextracción electrocinética asistida Residuos mineros Ballico Corriente continua Corriente alterna |
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oai:ruidera.uclm.es:10578/30694 |
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España |
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| dc.title.none.fl_str_mv |
Comprehensive study of electrokinetic-assisted phytoextraction of metals from mine tailings by applying direct and alternate current |
| title |
Comprehensive study of electrokinetic-assisted phytoextraction of metals from mine tailings by applying direct and alternate current |
| spellingShingle |
Comprehensive study of electrokinetic-assisted phytoextraction of metals from mine tailings by applying direct and alternate current Rodriguez, Luis Metals Electrokinetic-assisted phytoextraction Mine tailings Ryegrass DC current AC current Metales Fitoextracción electrocinética asistida Residuos mineros Ballico Corriente continua Corriente alterna |
| title_short |
Comprehensive study of electrokinetic-assisted phytoextraction of metals from mine tailings by applying direct and alternate current |
| title_full |
Comprehensive study of electrokinetic-assisted phytoextraction of metals from mine tailings by applying direct and alternate current |
| title_fullStr |
Comprehensive study of electrokinetic-assisted phytoextraction of metals from mine tailings by applying direct and alternate current |
| title_full_unstemmed |
Comprehensive study of electrokinetic-assisted phytoextraction of metals from mine tailings by applying direct and alternate current |
| title_sort |
Comprehensive study of electrokinetic-assisted phytoextraction of metals from mine tailings by applying direct and alternate current |
| dc.creator.none.fl_str_mv |
Rodriguez, Luis Medina-Diaz, H.L López-Bellido Garrido, Francisco Javier Alonso Azcárate, Jacinto Fernández Morales, Francisco Jesús |
| author |
Rodriguez, Luis |
| author_facet |
Rodriguez, Luis Medina-Diaz, H.L López-Bellido Garrido, Francisco Javier Alonso Azcárate, Jacinto Fernández Morales, Francisco Jesús |
| author_role |
author |
| author2 |
Medina-Diaz, H.L López-Bellido Garrido, Francisco Javier Alonso Azcárate, Jacinto Fernández Morales, Francisco Jesús |
| author2_role |
author author author author |
| dc.subject.none.fl_str_mv |
Metals Electrokinetic-assisted phytoextraction Mine tailings Ryegrass DC current AC current Metales Fitoextracción electrocinética asistida Residuos mineros Ballico Corriente continua Corriente alterna |
| topic |
Metals Electrokinetic-assisted phytoextraction Mine tailings Ryegrass DC current AC current Metales Fitoextracción electrocinética asistida Residuos mineros Ballico Corriente continua Corriente alterna |
| description |
Electrokinetic-assisted phytoextraction (EKPH) involves the use of electric current to improve the mobilization of metals in soils and, therefore, their removal efficiency. It emerges as an interesting sustainable technology for the rehabilitation of abandoned mining areas. The goal of this research was to conduct a comprehensive study of this technique applied to real mine tailings from an abandoned Pb/Zn mine by using ryegrass as plant species and two types of electric current: direct with polarity reversal (DC-PR) and alternate (AC). The EKPH tests were conducted in specially designed plastic containers that allowed recording the main parameters of the electrokinetic process and sampling the different matrices studied, i.e. water, soil and plants. This intensive sampling program allowed detailed monitoring of the metal mobilization processes for the different treatments applied. The changes caused in metal mobility and physicochemical parameters of the tailings due to the application of electric current were reflected to a greater extent in the water samples than in solid ones. Accumulation of Pb, Zn, Cd and Cu in ryegrass tissues increased significantly by 41%, 17%, 34% and 32% when applying 1 V cm−1 of AC current, with respect to the results of phytoextraction without electric current. The application of DC-PR current did not lead, in general, to statistically significant increases in the plant metal uptake. These findings were adequately correlated with the changes found in the metal concentrations of soil pore water and, to a lesser extent, with those observed from the BCR sequential extraction applied to tailings samples. |
| publishDate |
2023 |
| dc.date.none.fl_str_mv |
2023 2023 2023 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article |
| format |
article |
| dc.identifier.none.fl_str_mv |
https://doi.org/10.1016/j.electacta.2023.142051 https://hdl.handle.net/10578/30694 |
| url |
https://doi.org/10.1016/j.electacta.2023.142051 https://hdl.handle.net/10578/30694 |
| dc.language.none.fl_str_mv |
Inglés |
| language_invalid_str_mv |
Inglés |
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info:eu-repo/semantics/openAccess |
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openAccess |
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text/plain application/pdf application/pdf |
| dc.publisher.none.fl_str_mv |
Elsevier |
| publisher.none.fl_str_mv |
Elsevier |
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reponame:RUIdeRA. Repositorio Institucional de la UCLM instname:Universidad de Castilla-La Mancha |
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Universidad de Castilla-La Mancha |
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RUIdeRA. Repositorio Institucional de la UCLM |
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RUIdeRA. Repositorio Institucional de la UCLM |
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| _version_ |
1869413972653899776 |
| spelling |
Comprehensive study of electrokinetic-assisted phytoextraction of metals from mine tailings by applying direct and alternate currentRodriguez, LuisMedina-Diaz, H.LLópez-Bellido Garrido, Francisco JavierAlonso Azcárate, JacintoFernández Morales, Francisco Jesús MetalsElectrokinetic-assisted phytoextractionMine tailingsRyegrassDC currentAC currentMetalesFitoextracción electrocinética asistidaResiduos minerosBallicoCorriente continuaCorriente alternaElectrokinetic-assisted phytoextraction (EKPH) involves the use of electric current to improve the mobilization of metals in soils and, therefore, their removal efficiency. It emerges as an interesting sustainable technology for the rehabilitation of abandoned mining areas. The goal of this research was to conduct a comprehensive study of this technique applied to real mine tailings from an abandoned Pb/Zn mine by using ryegrass as plant species and two types of electric current: direct with polarity reversal (DC-PR) and alternate (AC). The EKPH tests were conducted in specially designed plastic containers that allowed recording the main parameters of the electrokinetic process and sampling the different matrices studied, i.e. water, soil and plants. This intensive sampling program allowed detailed monitoring of the metal mobilization processes for the different treatments applied. The changes caused in metal mobility and physicochemical parameters of the tailings due to the application of electric current were reflected to a greater extent in the water samples than in solid ones. Accumulation of Pb, Zn, Cd and Cu in ryegrass tissues increased significantly by 41%, 17%, 34% and 32% when applying 1 V cm−1 of AC current, with respect to the results of phytoextraction without electric current. The application of DC-PR current did not lead, in general, to statistically significant increases in the plant metal uptake. These findings were adequately correlated with the changes found in the metal concentrations of soil pore water and, to a lesser extent, with those observed from the BCR sequential extraction applied to tailings samples.La fitoextracción electrocinética asistida (EKPH) implica el uso de corriente eléctrica para mejorar la movilización de metales en suelos y, por tanto, su eficiencia de eliminación. Surge como una interesante tecnología sostenible para la rehabilitación de zonas mineras abandonadas. El objetivo de esta investigación fue realizar un estudio exhaustivo de esta técnica aplicada a estériles mineros reales procedentes de una mina abandonada de Pb/Zn utilizando ryegrass como especie vegetal y dos tipos de corriente eléctrica: continua con inversión de polaridad (DC-PR) y alterna (AC). Los ensayos EKPH se realizaron en recipientes de plástico especialmente diseñados que permitieron registrar los principales parámetros del proceso electrocinético y muestrear las distintas matrices estudiadas, es decir, el agua, el suelo y las plantas. Este programa intensivo de muestreo permitió un seguimiento detallado de los procesos de movilización de metales para los diferentes tratamientos aplicados. Los cambios provocados en la movilidad de los metales y en los parámetros fisicoquímicos de los estériles debido a la aplicación de corriente eléctrica se reflejaron en mayor medida en las muestras de agua que en las sólidas. La acumulación de Pb, Zn, Cd y Cu en los tejidos de ryegrass aumentó significativamente en un 41%, 17%, 34% y 32% al aplicar 1 V cm-1 de corriente AC, respecto a los resultados de la fitoextracción sin corriente eléctrica. La aplicación de corriente DC-PR no condujo, en general, a incrementos estadísticamente significativos en la captación de metales por la planta. Estos resultados se correlacionaron adecuadamente con los cambios encontrados en las concentraciones metálicas del agua de poro del suelo y, en menor medida, con los observados a partir de la extracción secuencial BCR aplicada a muestras de estériles.Elsevier202320232023info:eu-repo/semantics/articletext/plainapplication/pdfapplication/pdfhttps://doi.org/10.1016/j.electacta.2023.142051https://hdl.handle.net/10578/30694reponame:RUIdeRA. Repositorio Institucional de la UCLMinstname:Universidad de Castilla-La ManchaInglésinfo:eu-repo/semantics/openAccessoai:ruidera.uclm.es:10578/306942026-05-27T07:36:41Z |
| score |
15.301629 |