A carregar...
Publicação
Local versus regional soil screening levels to identify potentially polluted areas
| Nome: | Descrição: | Tamanho: | Formato: | |
|---|---|---|---|---|
| 2.71 MB | Adobe PDF |
Orientador(es)
Resumo(s)
Soil screening levels (SSLs) are reference threshold values required by
environmental laws, established based on soil geochemical background data from
often-extensive sampling areas. Such areas are often inappropriate for interpreting the
true risk of pollution in small areas, since they overlook local factors (e.g., geology,
industry, and traffic), which are unfeasible to encompass in large-scale samplings. To
solve this issue, the calculation of local SSLs is proposed herein, performed on amajor
scale closer to the area of interest. To exemplify this proposal, a soil sampling campaign
was performed in the Municipality of Langreo, one of the most industrialized
areas in the Principality of Asturias (northwestern Spain). Sampling allowed the measurement
of local soil screening levels for several inorganic contaminants. Afterwards,
a soil pollution index was calculated, referred to both regional and local thresholds,
to assess the degree of contamination. Both pollution indicators were subjected to a
methodology based on a Bayesian network analysis, followed by a stochastic sequential
Gaussian simulation approach. The methodologies used showed differences in
the identification of potentially polluted areas depending on the soil screening levels
(regional or local) used. It was concluded that, in urban/industrial cores, local
soil screening levels facilitate the identification of polluted areas and also reduce the
uncertainty associated with sampling density and diffuse contamination. Thus, the use of local levels circumvents false-positive areas that would be classified as polluted were
regional soil screening levels to be used.
Descrição
Palavras-chave
Soil pollution Potentially toxic elements Soil screening levels Geostatistics Machine learning
Contexto Educativo
Citação
BOENTE, C. [et al.] (2019) - Local versus regional soil screening levels to identify potentially polluted areas. Mathematical Geosciences. ISSN 1874-8953. https://doi.org/10.1007/s11004-019-09792-x
Editora
Springer