| Texto completo | |
| Autor(es): |
Biamont-Rojas, Ivan Edward
;
Cardoso-Silva, Sheila
;
Lopes Figueira, Rubens Cesar
;
Mi Kim, Bianca Sung
;
Alfaro-Tapia, Rene
;
Pompeo, Marcelo
Número total de Autores: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Science of The Total Environment; v. 871, p. 12-pg., 2023-05-01. |
| Resumo | |
Spatial distribution and interpolation methods provide a summarized overview about the pollution dispersion, concerning the environment's quality. A high-altitude lake was taken as a model to assess the metalloid As and metals Cr, Cu, Ni, Pb, Zn distribution in superficial sediment and classify them according to their ecotoxicological potential in the aquatic environment. Surface sediments were collected from 11 sites along Puno Bay located at the western area of Lake Titicaca, Peru, and analyzed for pseudo total-metals. Sediment concentration data and quality were plotted using the Inverse Distance Weighting (IDW) as an interpolation method. High concentrations of As were found especially in the outer bay (81.73 mg.kg-1). Spatial heterogeneity was evidenced for metal by the coefficient of variation, although no significative differences were observed between the two bays applying a Kruskall Wallis test (p < 0.05, df = 1). Sediment quality classification showed that most metal values were below TEL and toxicity was unlikely to occur, only As exceeded threefold PEL values, which categorized sediment as "Very Bad", indicating a rather high ecotoxicological potential to the aquatic environment. In conclusion, spatial analysis connected to interpolation methods demonstrated the superficial sediment heterogeneity in Puno Bay. (AU) | |
| Processo FAPESP: | 16/24528-2 - Metais em sedimentos de reservatórios paulistas: subsídio à tomada de decisões através de abordagens geoestatística e ecotoxicológica |
| Beneficiário: | Marcelo Luiz Martins Pompêo |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 19/10845-4 - Qualidade da água de reservatórios paulistas: o peso das evidências |
| Beneficiário: | Marcelo Luiz Martins Pompêo |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |