Contenido y distribución de mercurio en profundidad en suelos podzólicos del NW de España

  1. Antía Gómez-Armesto 1
  2. Lucía Bibián-Nuñez 1
  3. Xabier Pontevedra-Pombal 2
  4. Eduardo García-Rodeja Gayoso 2
  5. Manuel Arias-Estévez 1
  6. Juan Carlos Nóvoa-Muñoz 1
  1. 1 Universidade de Vigo
    info

    Universidade de Vigo

    Vigo, España

    ROR https://ror.org/05rdf8595

  2. 2 Universidade de Santiago de Compostela
    info

    Universidade de Santiago de Compostela

    Santiago de Compostela, España

    ROR https://ror.org/030eybx10

Libro:
Solos e Água, fontes (esgotáveis) de vida e de desenvolvimento Livro de atas: VII Congresso Ibérico das Ciências do Solo (CICS 2016) VI Congresso Nacional de Rega e Drenagem, 13-15 de Setembro de 2016, Instituto Politécnico de Beja, Beja

Editorial: Sociedade Portuguesa da Ciência do Solo (SPCS)

ISBN: 978-989-99665-0-5

Ano de publicación: 2016

Páxinas: 375-378

Tipo: Capítulo de libro

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Resumo

Mercury content and distribution, as well as the relationships between Hg and soil components were studied in 10 podzolic soils from Lugo province (NW Spain). Total Hg concentrations in the studied soils ranged from 7 to 116 ng g-1, being somewhat lower than the reference level established for Galician soils. In spite of this, podzols and podzolic soils play a key role in the accumulation of Hg and other potentially hazardous elements in the subsur- face soil layers as a consequence of the pedogenetic processes that take place in them. The main soil compo- nents involved in Hg retention and accumulation are soil organic matter and Al and Fe compounds, to which Hg shows a great geochemical affinity. Thus, highly significant correlations (p< 0.01) were obtained between Hg and soil organic matter and between Hg and Al and Fe compounds extracted with different extractant solutions. Re- garding Hg distribution in the soil profile, a strong decrease of Hg concentrations in the eluvial horizons (E) was observed whereas a subsurface peak of total Hg was detected in the illuvial horizons (Bh and Bs).

Fonte de datos: Dialnet