Cadmium behavior in a karst environment hydrological cycle

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dc.creatorThiago Nogueiralucon
dc.creatorAdivane Terezinha Costa
dc.creatorPaulo Henrique Ferreira Galvão
dc.creatorMariangela Garcia Praça Leite
dc.date.accessioned2023-04-18T21:29:08Z
dc.date.accessioned2025-09-09T00:20:20Z
dc.date.available2023-04-18T21:29:08Z
dc.date.issued2020
dc.identifier.doihttps://doi.org/10.1007/s11356-020-07894-2
dc.identifier.issn1614-7499
dc.identifier.urihttps://hdl.handle.net/1843/52201
dc.languagepor
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofEnvironmental Science and Pollution Research
dc.rightsAcesso Restrito
dc.subjectÁgua subterrânea
dc.subject.otherNatural back groundlevel
dc.subject.otherCadmium contamination
dc.subject.otherSão Miguel watershed
dc.titleCadmium behavior in a karst environment hydrological cycle
dc.typeArtigo de periódico
local.citation.epage15
local.citation.issue4
local.citation.spage1
local.citation.volume27
local.description.resumoKarst regions are important water providers, supplying approximately 25% of the world population. These areas present higher vulnerability to contamination due to hydrodynamics, which hampers the natural depuration of these waters until reaching the underground environment. High concentrations of cadmium (Cd) are observed in the São Miguel watershed, state of Minas Gerais, Brazil. This toxic element is generally and predominantly released into the atmosphere by burning materials that have Cd in their composition, potentially contaminating surface and groundwater. Therefore, the objective of the study is to map Cd concentrations in the hydrological cycle of the São Miguel karst watershed and, through natural background level values (NBL 90%) of rainwater, surface water and groundwater, to understand the seasonal behavior of this element, and to identify the most vulnerable areas to contamination. To achieve this goal, rainwater, surface, and ground water seasonal monitoring were conducted in 87 sampling stations. A total of 335 samples were collected, distributed over a watershed area of 520 km2. Concentrations of cadmium above 1 μg/L were found in 21.49% of samples during the rainy season. The origin and distribution of Cd were related to rainfall. For rain water samples, 90% presented Cd concentration of 3.06 μg/L. When these waters precipitate, they contaminate surface waters (NBL 90%= 1.50 μg/L) and groundwater (NBL 90%=2.81 μg/L). This study presented a hydrochemical cycle map and proposed NBL values of Cd for surface water and groundwater, helping to understand how the environment is contaminated by this element.
local.identifier.orcidhttps://orcid.org/0000-0001-9744-2435
local.identifier.orcidhttps://orcid.org/0000-0002-0440-7970
local.identifier.orcidhttps://orcid.org/0000-0001-7183-0368
local.publisher.countryBrasil
local.publisher.departmentIGC - DEPARTAMENTO DE GEOLOGIA
local.publisher.initialsUFMG
local.url.externahttps://link.springer.com/article/10.1007/s11356-020-07894-2

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