Bioavailability and extraction of heavy metals from contaminated soil by Atriplex halimus

Pérez Esteban, Javier and Escolástico, Consuelo and Ruíz Fernández, Juan and Masaguer Rodríguez, Alberto and Moliner Aramendia, Ana María (2013). Bioavailability and extraction of heavy metals from contaminated soil by Atriplex halimus. "Environmental and Experimental Botany", v. 88 ; pp. 53-59. ISSN 0098-8472. https://doi.org/10.1016/j.envexpbot.2011.12.003.

Description

Title: Bioavailability and extraction of heavy metals from contaminated soil by Atriplex halimus
Author/s:
  • Pérez Esteban, Javier
  • Escolástico, Consuelo
  • Ruíz Fernández, Juan
  • Masaguer Rodríguez, Alberto
  • Moliner Aramendia, Ana María
Item Type: Article
Título de Revista/Publicación: Environmental and Experimental Botany
Date: April 2013
ISSN: 0098-8472
Volume: 88
Subjects:
Faculty: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Department: Edafología [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Pot experiments were performed to evaluate the phytoremediation capacity of plants of Atriplex halimus grown in contaminated mine soils and to investigate the effects of organic amendments on the metal bioavailability and uptake of these metals by plants. Soil samples collected from abandoned mine sites north of Madrid (Spain) were mixed with 0, 30 and 60 Mg ha?1 of two organic amendments, with different pH and nutrients content: pine-bark compost and horse- and sheep-manure compost. The increasing soil organic matter content and pH by the application of manure amendment reduced metal bioavailability in soil stabilising them. The proportion of Cu in the most bioavailable fractions (sum of the water-soluble, exchangeable, acid-soluble and Fe?Mn oxides fractions) decreased with the addition of 60 Mg ha?1 of manure from 62% to 52% in one of the soils studied and from 50% to 30% in the other. This amendment also reduced Zn proportion in water-soluble and exchangeable fractions from 17% to 13% in one of the soils. Manure decreased metal concentrations in shoots of A. halimus, from 97 to 35 mg kg?1 of Cu, from 211 to 98 mg kg?1 of Zn and from 1.4 to 0.6 mg kg?1 of Cd. In these treatments there was a higher plant growth due to the lower metal toxicity and the improvement of nutrients content in soil. This higher growth resulted in a higher total metal accumulation in plant biomass and therefore in a greater amount of metals removed from soil, so manure could be useful for phytoextraction purposes. This amendment increased metal accumulation in shoots from 37 to 138 mg pot?1 of Cu, from 299 to 445 mg pot?1 of Zn and from 1.8 to 3.7 mg pot?1 of Cd. Pine bark amendment did not significantly alter metal availability and its uptake by plants. Plants of A. halimus managed to reduce total Zn concentration in one of the soils from 146 to 130 mg kg?1, but its phytoextraction capacity was insufficient to remediate contaminated soils in the short-to-medium term. However, A. halimus could be, in combination with manure amendment, appropriate for the phytostabilization of metals in mine soils.

More information

Item ID: 16510
DC Identifier: http://oa.upm.es/16510/
OAI Identifier: oai:oa.upm.es:16510
DOI: 10.1016/j.envexpbot.2011.12.003
Official URL: http://www.sciencedirect.com/science/article/pii/S0098847211003108
Deposited by: Memoria Investigacion
Deposited on: 22 Jul 2013 14:41
Last Modified: 30 Apr 2015 22:56
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