Journal article
Influence of river water diversion on hydrogeochemistry and ree distribition, Rio de Janeiro, Brazil
CARPATHIAN JOURNAL OF EARTH AND ENVIRONMENTAL SCIENCES, Vol.13(2), pp.453-464
08/2018
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Source: InCites
Abstract
A previous study made by our group indicated that the changes in the rare earth element (REE) distribution pattern, within the upper 30cm of sediment column from Sepetiba bay, are related to Paraiba do Sul River (PSR) diversion. Here we show that REE fractionations in the water column are directly related with the construction of PSR and Guandu river watershed diversion system. Surface water samples were collected during the dry and wet season in specific sites along the transposition system. A tangential ultrafiltration system was used to obtain specific fractions: particulate (SPM load < 63 mu m to > 0.1 mu m) colloidal (colloidal load >10 kDa) and dissolved (dissolved load >1 kDa) fractions. The nutrients (H4SiO4, PO43-, F-, Cl-, SO42-, Na+, K+, Ca2+, and Mg2+) and REE were analyzed in each of fractions. The relatively large total REE concentrations found in the PSR diminished substantially when reaching the downstream section of the tributary, showing lower concentrations when compared to a nearby river unaffected by the diversion. Some of the factors that may control the self-purification of REE, include the trapping of the particulate fractions associated with suspended matter in dams along the basin, uptake of the dissolved fraction by aquatic plants in nutrient rich waters of the tributaries, and co-precipitation with oxides/hydroxides as the redox potential increased downstream from the water diversion.
Details
- Title
- Influence of river water diversion on hydrogeochemistry and ree distribition, Rio de Janeiro, Brazil
- Creators
- Joanna Maria Santos-Neves - Universidade Federal FluminenseEduardo Duarte Marques - Serviço Geológico do Brasil - CPRMVinicius Tavares Kutter - Universidade Federal FluminenseLuiz Drude Lacerda - Universidade Federal do CearáChristian Joshua Sanders - Southern Cross UniversitySilvia Maria Sella - Universidade Federal FluminenseEmmanoel Vieira Silva-Filho - Universidade Federal Fluminense
- Publication Details
- CARPATHIAN JOURNAL OF EARTH AND ENVIRONMENTAL SCIENCES, Vol.13(2), pp.453-464
- Publisher
- Carpathian Assoc Environment and Earth Sciences
- Number of pages
- 12
- Grant note
- E-26/101.952/2009 / FAPERJ (Foundation Carlos Chagas Filho Research Support of the State of Rio de Janeiro) 420050/2005-1 / Instituto do Milenio 573-601/2008-9 / INCT-TMCOcean / CNPq (National Counsel of Technological and Scientific Development); Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPQ)
- Identifiers
- 991013099079702368
- Copyright
- (c) 2006 - 2023 , Publisher - Carpathian Association of Environment and Earth Sciences
- Academic Unit
- Faculty of Science and Engineering
- Language
- English
- Resource Type
- Journal article