Patterning total mercury distribution in coastal podzolic soils from an Atlantic area: Influence of pedogenetic processes and soil components
| العنوان: | Patterning total mercury distribution in coastal podzolic soils from an Atlantic area: Influence of pedogenetic processes and soil components |
|---|---|
| المؤلفون: | Antía Gómez-Armesto, Juan Carlos Nóvoa-Muñoz, P. Marques, Manuel Madeira, Xabier Pontevedra-Pombal, Melissa Méndez-López, Manuel Arias-Estévez, F. Monteiro |
| المساهمون: | Universidade de Santiago de Compostela. Departamento de Edafoloxía e Química Agrícola |
| المصدر: | Minerva. Repositorio Institucional de la Universidad de Santiago de Compostela instname Investigo. Repositorio Institucional de la Universidade de Vigo Universidade de Vigo (UVigo) Minerva: Repositorio Institucional de la Universidad de Santiago de Compostela Universidad de Santiago de Compostela (USC) Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP |
| بيانات النشر: | Elsevier, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | 010504 meteorology & atmospheric sciences, Distribution (economics), 01 natural sciences, 2417 Biología Vegetal (Botánica), Strategic partnership, 2511.06 Conservación de Suelos, Al and Fe compounds, 0105 earth and related environmental sciences, Earth-Surface Processes, PCA, Portugal, business.industry, Forestry, 04 agricultural and veterinary sciences, 15. Life on land, Regression, 2511 Ciencias del Suelo (Edafología), Geography, 13. Climate action, Research centre, Soil water, 040103 agronomy & agriculture, 0401 agriculture, forestry, and fisheries, Organic matter, business, Prediction |
| الوصف: | Soils are the main Hg reservoir in the terrestrial ecosystems where it is deposited via wet or dry deposition and litterfall. Once on the soil surface, different biogeochemical routes will determine the fate of Hg and the role of terrestrial ecosystems as a Hg source or sink. The specific chemical and physical characteristics of Podzols and podzolic soils contribute to the accumulation of Hg in their illuvial horizons, avoiding its leaching to groundwater. The geographical location, state of pedogenesis, soil age, abundance of carrier phases and physical properties can affect the presence and distribution of Hg in soils. Therefore, understand and relate these factors with the behavior of Hg in Podzols and podzolic soils is key to define the role of this type of soil in the terrestrial Hg cycle. In this work, ten podzolic soil profiles were collected in an Atlantic coastal forest area of Portugal and analyzed for the main physico-chemical properties and Hg content to assess the influence of the intensity of podzolization in the Hg depth distribution. Three different patterns of Hg distribution in the studied Podzols, depending on the predominance of atmospheric deposition or the intensity of podzolization, have been defined. The pattern I showed the maximum Hg contents in the surface A horizons (12.9–23.5 µg kg−1), pattern II exhibited the highest peaks in the subsurface illuvial horizons (2.3–17.3 µg kg−1) and pattern III presented an even distribution of Hg through the soil profile. We found that dissolved organic matter (DOM) is the main carrier of Hg in the A and E horizons, whereas metal(Al, Fe)-humus complexes and/or oxyhydroxides contribute to immobilizing Hg in the illuvial horizons (Bh, Bs and Bhs). The principal component regression (PCR) analysis predicted satisfactorily the Hg distribution through soil organic matter and Al and Fe oxyhydroxides. The Hg immobilized in the subsurface layers of Podzols is retained in the long term, avoiding its migration to other components of terrestrial ecosystems where it could cause serious environmental damage such as groundwater and superficial waters The research was partially developed within the Forest Research Centre activities (UID/AGR/00239/2013). A. Gómez-Armesto acknowledges to the Xunta de Galicia a predoctoral grant (ED481A-2016/220). M. Méndez-López acknowledges the predoctoral grant FPU of Ministerio de Educación y Formación Profesional (FPU17/05484). It is also recognized the financial support of the Consellería de Cultura, Educación e Ordenación Universitaria (Xunta de Galicia) through the contract ED431C 2017/62-GRC granted to the research group BV1 of the University of Vigo, the research project ED431F2018/06-EXCELENCIA and CITACA Strategic Partnership (ED431E 2018/07) SI |
| وصف الملف: | application/pdf |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::995b5646295a496ba4ff10874a8c3d33 http://hdl.handle.net/10347/26729 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....995b5646295a496ba4ff10874a8c3d33 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |