Programa e Resumos - I Congresso IbÃ©rico de CiÃªncia do Solo 2004

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I Congresso Ibérico da Ciência do Solo – 15 a 18 de Junho de 2004, Bragança, Portugal Effects of Zn on Bromus rubens L. in a Polluted Calcic Luvisol Soil. Potential Use of the Species in Revegetation and Phytoremediation. Ana J. Hernández Sánchez 1 & Jesús Pastor Piñeiro 2 1 Departamento Interuniversitario de Ecología, Universidad de Alcalá, Alcalá de Henares (Madrid). E-mail: anaj.hernández@uah.es 2 Departamento de Biología Ambiental. Centro de Ciencias Medioambientales, CSIC, Madrid. E-mail: jpastor@ccma.csic.es Abstract Comunicação: Painel The most heavily metal polluted soils in central Spain are found in areas occupied by abandoned mine lands and old urban and industrial waste landfills. Zn is the most extensively dispersed pollutant and can reach phytotoxic concentrations. Although several plant species are known to take up metals from the soil, the different ability of these species to do so has not yet been established, and because of their particular ecologic characteristics, many are unable to grow in the conditions of the area examined in the present study. Unfortunately, there is a lack of relevant data on the phytoremediation and revegetation potential of native plant species able to grow in polluted and degraded soils in xeric environments. One such species is Bromus rubens L., a native plant that grows in xeric grass and shrub lands. The area under study was previously screened to establish which species grew best by stratified sampling and performing plant inventories. Soil samples were obtained from degraded and polluted environments in xeric areas and from reference, neighbouring herbaceous ecosystems. Bromus rubens L. was found in 44 sites. Their ecological profile indicated a preference for the soils of highest Zn levels. When Zn was determined in plants collected from these soils, Zn levels in the red brome were found to increase as the Zn concentration of the soil rose. In a pot experiment on a calcaric luvisol, increasing soil Zn content was observed to mostly affect the root levels of this metal, but raised contents were also detected in the aerial part of the plant. Root Mn and Mg were also seen to rise with increasing Zn levels. In the aerial part of the red brome, soil Zn was associated with increased Cu and Ca, and lower Mg levels. Collectively, the results suggest that this species is able to accumulate significant Zn concentrations. The relatively good size and soil cover achieved by the red brome in polluted soils, means it could be a suitable candidate for use in studies directed towards the revegetation and phytoremediation of xeric degraded soils as those examined here. Acknowledgements: This study was funded by the REN2002-02501/ TECNO project. – 96 –
I Congresso Ibérico da Ciência do Solo – 15 a 18 de Junho de 2004, Bragança, Portugal Estudio de la variabilidad mineralógica de suelos generados en la restauración de una escombrera de una cantera de yeso. Clara Galarza, Carmen Vizcayno & Ricardo Castelló Centro de Ciencias Medioambientales CSIC Serrano 115 dup, 28006-MadridTel: 34 917452500 – FAX: 34 915640800 – E-mail: cvizcayno@ccma.csic.es Resumen Comunicação: Painel En la restauración de la cantera de yeso de IBERPLACO S.A. se ha realizado un estudio sobre suelos, en parcelas experimentales, en las que se intenta reproducir los niveles edáficos naturales del entorno. Para ello se emplearon los estériles de la escombrera enmendados con diferentes cantidades de RU recubiertos de suelo natural procedente del frente de explotación. El objetivo de este trabajo es evaluar los cambios que se producen en el tiempo considerando la alteración de la materia orgánica y la movilidad de las fracciones finas. Para conseguir este objetivo se ha realizado el estudio mineralógico mediante difracción de rayos X (DRX), métodos térmicos (ATG, ATD) y espectroscopía de absorción infrarroja (FTIR) de las fracciones
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Programa e Resumos - I Congresso IbÃ©rico de CiÃªncia do Solo 2004

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