Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Phytoremediation of Cu and Zn by vetiver grass in mine soils amended with humic acids
Research Areas
  • Quality of the environment,
  • Agriculture,
  • Pollution
Phytoremediation of contaminated mine soils requires the use of fast-growing, deep-rooted, high-biomass, and metal-tolerant plants with the application of soil amendments that promote metal uptake by plants. A pot experiment was performed to evaluate the combined use of vetiver grass (Chrysopogon zizanioides) and humic acid for phytoremediation of Cu and Zn in mine soils. Vetiver plants were grown in soil samples collected from two mine sites of Spain mixed with a commercial humic acid derived from leonardite at doses of 0, 2, 10, and 20 g kg?1. Plant metal concentrations and biomass were measured and metal bioavailability in soils was determined by a low molecular weight organic acid extraction. Results showed that humic acid addition decreased organic acid-extractable metals in soil. Although this extraction method is used to estimate bioavailability of metals, it was not a good estimator under these conditions due to competition with the strong chelators in the added humic acid. High doses of humic acid also promoted root growth and increased Cu concentrations in plants due to formation of soluble metal-organic complexes, which enhanced removal of this metal from soil and its accumulation in roots. Although humic acid was not able to improve Zn uptake, it managed to reduce translocation of Zn and Cu to aerial parts of plants. Vetiver resulted unsuitable for phytoextraction, but our study showed that the combined use of this species with humic acid at 10?20 g kg?1 could be an effective strategy for phytostabilization of mine soils.
Environmental Science and Pollution Research
Impact factor JCR
Impact info
JCR 2014
Journal number
From page
To page
JCR 2014 Q1 (Environ. Sciences 54/223)
  • Autor: Carmen Vargas Victoriano (UPM)
  • Autor: Javier Perez Esteban (UPM)
  • Autor: Consuelo Escolástico León (UNED)
  • Autor: Alberto Masaguer Rodriguez (UPM)
  • Autor: Ana Maria Moliner Aramendia (UPM)
Research Group, Departaments and Institutes related
  • Creador: Departamento: Producción Agraria
S2i 2021 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)