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1.
Mar Pollut Bull ; 186: 114419, 2023 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-36525757

RESUMO

Multivariate analyses have been applied to the REE contents of three cores collected in the Tinto estuary, SW Spain, an extremely polluted area. Results indicate an extremely correlation between all REE, which behave as a single variable. A slight natural pollution peak and three anthropogenic pollution peaks are identified, related with the first mining activities, the Roman period and a recent intensive mining accompanied by a heavy industrial pollution. In all these peaks, the increase of Cu is parallel to that of MREE, which are configured as the best indicators of pollution among REE. Statistical analyses clearly differentiate four groups, each consisting of samples from different environments. Although grain size and this strong pollution alter the study of REE as environmental indicators, it is possible to recognise groups of samples with a common origin or to identify the surface extent of a given pollution peak.


Assuntos
Metais Terras Raras , Poluentes Químicos da Água , Espanha , Estuários , Poluentes Químicos da Água/análise , Metais Terras Raras/análise , Poluição Ambiental/análise , Monitoramento Ambiental/métodos
2.
Mar Pollut Bull ; 150: 110704, 2020 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-31740180

RESUMO

Estuaries are very sensitive ecosystems to human activities and the natural evolution of their drainage basins located upstream. Pollution derived from human activities, such as historical mining or recent industrial wastes, can significantly affect their environmental quality. This paper analyzes the silver and copper contents of four cores extracted in two estuaries of SW Spain. Its chronology and vertical evolution allow to differentiate the effects of several pollution episodes (natural, Roman, 19th-20th centuries) on its different sedimentary environments in the last 6 million years. Possible future applications are included in the fields of environmental management or even education.


Assuntos
Cobre/análise , Monitoramento Ambiental/métodos , Sedimentos Geológicos , Prata/análise , Poluentes Químicos da Água/análise , Poluição Química da Água/estatística & dados numéricos , Ecossistema , Estuários , Humanos , Espanha
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