Impact of the lavender rhizosphere on the mercury uptake in field conditions
| Autor: | J. Rodríguez-Alonso, M.J. Sierra, Rocío Millán |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Environmental Engineering
Lavender Health Toxicology and Mutagenesis Bulk soil chemistry.chemical_element Plant Roots Mining Soil Cation-exchange capacity Soil Pollutants Environmental Chemistry Organic matter chemistry.chemical_classification Rhizosphere Public Health Environmental and Occupational Health Edaphic Mercury General Medicine General Chemistry Pollution Mercury (element) Lavandula chemistry Agronomy Environmental chemistry Soil water Environmental Monitoring |
| Zdroj: | Chemosphere. 89:1457-1466 |
| ISSN: | 0045-6535 |
| DOI: | 10.1016/j.chemosphere.2012.06.017 |
| Popis: | Lavender plants as well as their rhizosphere and bulk soil were sampled on a wide range of soils with different land use within the Almaden mercury mining district. The aim of this work is to evaluate the role of the rhizosphere on mercury behavior in soil-lavender plant system including chemometric analysis. The edaphic parameters that significantly differed between lavender rhizosphere and bulk soil were: total Hg; easily available Hg; electrical conductivity; organic matter; cation exchange capacity; soluble ions (Cl−; SO 4 2 - ; PO 4 3 - ; NO 3 - ; Al+; Mn2+; Ca2+ and Mg2+). The most important variable in the differentiation is electrical conductivity. Furthermore, both organic matter and Mn2+ in rhizosphere soil seem to block Hg availability to plant. However, the presence of sulfates seems to favor it. Regarding other relationships, Hg seems to block Pb uptake by lavender plants and, on the other hand, the presence of Mn2+ seems to favor it. Furthermore, Hg root uptake by lavender and its distribution throughout the plant have been studied. The more available Hg in rhizosphere soil, the more Hg is translocated to aerial part and less Hg is retained by root. In all cases, the Hg concentration in the root was higher than in the aerial part. |
| Databáze: | OpenAIRE |
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