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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Use of a chemometric tool to establish the regional background and assess trace metal enrichment at Baixada Santista - southeastern Brazil

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Author(s):
Mi Kim, Bianca Sung ; Friedmann Angeli, Jose Lourenco ; de Lima Ferreira, Paulo Alves ; Sartoretto, Julie Rosemberg ; Miyoshi, Carolina ; de Mahiques, Michel Michaelovich ; Lopes Figueira, Rubens Cesar
Total Authors: 7
Document type: Journal article
Source: Chemosphere; v. 166, p. 372-379, JAN 2017.
Web of Science Citations: 7
Abstract

The trace metals in sediments consist of two components, anthropogenic and lithogenic or natural, which can cause misinterpretations for what actually exists in sediments. Normally, to investigate trace metal background levels, indices are applied in order to normalize the values and reduce natural variability, but it is well known that using the average shale or crust content is not the best choice and vertical sediment profiles are not always available. The purpose of this study is to use a prediction interval to assess metal enrichment without a reference level and to assess a regional background level using the same tool. The levels of eight elements were submitted to a partial digestion technique and analyzed by ICP-OES. The enrichment factor results suggested that using background values from the prediction interval and using values from vertical sediment profiles yield statistically similar results. Furthermore, the background equations present more realistic data than other methods because they consider the mud content of the samples. Thus, a prediction interval can be a useful tool to establish a regional background and assess trace metal enrichment. (C) 2016 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 09/01211-0 - Historical of anthropic activity in Bertioga Channel, Sao Paulo, Brazil: levels of metals, semi-metals and recent sedimentation in sedimentary columns
Grantee:Rubens Cesar Lopes Figueira
Support Opportunities: Regular Research Grants
FAPESP's process: 11/50581-4 - Susceptibility and resilience of urban estuarine systems to global changes: hydro-sedimentologic budget; sea-level rise; response to extreme events
Grantee:Rubens Cesar Lopes Figueira
Support Opportunities: Regular Research Grants