Potentially toxic metals in rivers upstream of Pantanal Norte

Revista Ambiente & Água. 2016;11(4):851-866 DOI 10.4136/ambi-agua.1827

 

Journal Homepage

Journal Title: Revista Ambiente & Água

ISSN: 1980-993X (Online)

Publisher: Instituto de Pesquisas Ambientais em Bacias Hidrográficas (IPABHi)

LCC Subject Category: Geography. Anthropology. Recreation: Environmental sciences

Country of publisher: Brazil

Language of fulltext: Portuguese, Spanish; Castilian, English

Full-text formats available: PDF, XML

 

AUTHORS

Geizibel Campos de Magalhães (Universidade Federal de Mato Grosso (UFMT), Cuiabá, MT, Brasil. Departamento de Programa de Pós-Graduação em Recursos Hídricos.)
Ibraim Fantin-Cruz (Universidade Federal de Mato Grosso (UFMT), Cuiabá, MT, Brasil. Departamento de Engenharia Sanitária e Ambiental. )
Peter Zeilhofer (Universidade Federal de Mato Grosso (UFMT), Cuiabá, MT, Brasil. Departamento de Geografia.)
Eliana Freire Gaspar de Carvalho Dores (Universidade Federal de Mato Grosso (UFMT), Cuiabá, MT, Brasil. Departamento de Química.)

EDITORIAL INFORMATION

Double blind peer review

Editorial Board

Instructions for authors

Time From Submission to Publication: 22 weeks

 

Abstract | Full Text

Cuiabá (CBA) and São Lourenço (SL) rivers are considered strategic once they integrate regions, which are economically, socially and environmentally relevant for Brazil and the world. However, several activities developed in their watersheds may represent sources of metals and be a threat to the environmental quality. Thus, in this study we evaluated the spatial and temporal variability of potentially toxic metals in water and sediment and the relationship of their concentration with water quality parameters. Surface water samples were collected monthly in 15 points and bottom sediment in nine points distributed throughout both rivers from August 2012 to July 2013. Cr, Cu, Fe, Mn, Pb and Zn were determined in water by inducted coupled plasma optical emission spectrometry and in sediment by flame atomic absorption spectrometry. Fe, Mn, Pb and Cr had high concentrations in water and sediment but only Pb and Cr represent environmental risk. Fe and Mn were in higher concentrations in at the upper points of SL River and Cu and Pb in the urban area of both rivers. Temporally, the metal concentrations were associated with precipitation variation. The observed correlations amongst metal concentrations indicate common sources. Thus, the metals occurrence and concentrations in water and sediment of both rivers showed a natural contribution, as a reflex of soil type associated to the region's precipitation regimen as well as the anthropic contribution due to agricultural and cattle breeding activities, and disposal of untreated urban effluents.