期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 541, 期 -, 页码 1504-1515出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2015.09.146
关键词
Trace elements; Sediment archive; Contamination; Temporal evolution; Loire basin; Fingerprinting
资金
- Agence de l'eau Loire-Bretagne (program MetOrg 1)
- CNRS Cytrix-EC2CO
- Etablissement Public Loire - FEDER
Fromthe 19th century, the Loire basin (France) presents potentially pollutant activities such as mining and heavy industries. This paper shows spatio-temporal distribution of trace elements in sediments at a basin-scale, based on a comparison of archived temporal signals recorded in four sedimentary cores. Anthropogenic sources contributing to sediment contamination are also characterized, using geochemical signatures recorded in river bank sediments of the most industrialized tributaries. This study highlights upstream-downstream differences concerning recorded contamination phases in terms of spatial influence and temporality of archiving processes. Such differences were related to (i) various spatial influences of contamination sources and (ii) polluted sediments dispersion controlled by transport capacity of metal-carrier phases and hydrosedimentary dynamics. (C) 2015 Elsevier B.V. All rights reserved.
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