Arsenic Occurrence In Brazil And Human Exposure.

dc.creatorde Figueiredo, Bernardino Ribeiro
dc.creatorBorba, Ricardo Perobelli
dc.creatorAngélica, Rômulo Simões
dc.date2007-Apr
dc.date2015-11-27T13:09:52Z
dc.date2015-11-27T13:09:52Z
dc.date.accessioned2018-03-29T01:04:28Z
dc.date.available2018-03-29T01:04:28Z
dc.identifierEnvironmental Geochemistry And Health. v. 29, n. 2, p. 109-18, 2007-Apr.
dc.identifier0269-4042
dc.identifier10.1007/s10653-006-9074-9
dc.identifierhttp://www.ncbi.nlm.nih.gov/pubmed/17351814
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/197200
dc.identifier17351814
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1297433
dc.descriptionEnvironmental exposure to arsenic (As) in terms of public health is receiving increasing attention worldwide following cases of mass contamination in different parts of the world. However, there is a scarcity of data available on As geochemistry in Brazilian territory, despite the known occurrence of As in some of the more severely polluted areas of Brazil. The purpose of this paper is to discuss existing data on As distribution in Brazil based on recent investigations in three contaminated areas as well as results from the literature. To date, integrated studies on environmental and anthropogenic sources of As contamination have been carried out only in three areas in Brazil: (1) the Southeastern region, known as the Iron Quadrangle, where As was released into the drainage systems, soils and atmosphere as a result of gold mining; (2) the Ribeira Valley, where As occurs in Pb-Zn mine wastes and naturally in As-rich rocks and soils; (3) the Amazon region, including the Santana area, where As is associated with manganese ores mined over the last 50 years. Toxicological studies revealed that the populations were not exposed to elevated levels of As, with the As concentrations in surface water in these areas rarely exceeding 10 microg/L. Deep weathering of bedrocks along with formation of Fe/Al-enriched soils and sediments function as a chemical barrier that prevents the release of As into the water. In addition, the tropical climate results in high rates of precipitation in the northern and southeastern regions and, hence, the As contents of drinking water is diluted. Severe cases of human As exposure related to non-point pollution sources have not been reported in Brazil. However, increasing awareness of the adverse health effects of As will eventually lead to a more complete picture of the distribution of As in Brazil.
dc.description29
dc.description109-18
dc.languageeng
dc.relationEnvironmental Geochemistry And Health
dc.relationEnviron Geochem Health
dc.rightsfechado
dc.rights
dc.sourcePubMed
dc.subjectArsenic
dc.subjectArsenic Poisoning
dc.subjectBrazil
dc.subjectDemography
dc.subjectEnvironmental Exposure
dc.subjectEnvironmental Monitoring
dc.subjectEpidemiological Monitoring
dc.subjectHumans
dc.subjectIndustrial Waste
dc.subjectMining
dc.subjectWater Pollutants, Chemical
dc.subjectWater Purification
dc.subjectWater Supply
dc.titleArsenic Occurrence In Brazil And Human Exposure.
dc.typeArtículos de revistas


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