Phytoextraction of heavy metals from mine soils using hyperaccumulator plants.

Pérez Esteban, Javier and Escolástico, Consuelo and Ruíz Fernández, Juan and Masaguer Rodríguez, Alberto and Moliner Aramendia, Ana María (2010). Phytoextraction of heavy metals from mine soils using hyperaccumulator plants.. "Tarim Bilimleri Dergisi-Journal of Agricultural Sciences", v. 25 (n. 3 Spec); pp. 224-230. ISSN 1300-7580.

Description

Title: Phytoextraction of heavy metals from mine soils using hyperaccumulator plants.
Author/s:
  • Pérez Esteban, Javier
  • Escolástico, Consuelo
  • Ruíz Fernández, Juan
  • Masaguer Rodríguez, Alberto
  • Moliner Aramendia, Ana María
Item Type: Article
Título de Revista/Publicación: Tarim Bilimleri Dergisi-Journal of Agricultural Sciences
Date: September 2010
ISSN: 1300-7580
Volume: 25
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

Phytoextraction is an environmental-friendly and cost-effective technology that uses metal hyperaccumulator plants to remove heavy metals from soils. The metals are absorbed by the roots, transported and accumulated in the aerial parts of the plants, which can be harvested and eliminated. The aim of this work was to study some hyperaccumulator species that could be useful to decontaminate mine soils and also to investigate the bioavailability and uptake of these metals by plants with the addition of organic amendments. Pot experiments were performed with soil samples collected from two mining areas in the north of Madrid, where there was an intense mining activity more than 50 years ago. Three species (Thlaspi arvense, Brassica juncea and Atriplex halimus) were grown under controlled conditions in pots filled with contaminated soils mixed with 0 Mg, 30 Mg and 60 Mg per hectare of two different organic amendments: a commercial compost made of pine bark, peat and wood fiber and other made of horse and sheep manure and wood fiber. Plants were harvested at the end of their crop cycle and were digested in order to measure metal concentration (Zn, Cu and Cd) in roots and shoots. Highest plant metal concentration was observed in pots treated with pine bark amendment and with pure soil due to an increase in metal bioavailability with decreasing pH. Also in those treatments the total plant biomass was lower, even some plants could not germinate. On the contrary, there was a lower metal concentration in plant tissues of pots with manure because its higher pH whereas plant growth was significantly larger so there was an incresing amount of metals removed from soil by plants. Comparing the three species results indicate a higher total metal uptake in A. halimus than B. juncea and T. arvense. In conclusion, results show that pH affects metal bioavailability and uptake by hyperaccumulator plants. Addition of organic amendments could be a successful technique for stabilization of metals in contaminated soils.

More information

Item ID: 15432
DC Identifier: http://oa.upm.es/15432/
OAI Identifier: oai:oa.upm.es:15432
Official URL: http://dergi.omu.edu.tr/index.php/ANAJAS/article/view/2587
Deposited by: Memoria Investigacion
Deposited on: 12 Jun 2013 12:41
Last Modified: 21 Apr 2016 15:29
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