Mercurio en cabello de diferentes grupos ocupacionales en una zona de minería aurifera en el Norte de Colombia

Olivero, Jesús; Mendonza, Claudia; Mestre, Judith

doi:10.1590/s0034-89101995000500006

Cited by 33 publications

(18 citation statements)

References 6 publications

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“…The mercury concentration found on Canteiro island was 5.5 times that found by D'Ilio et al 28 although their value was similar to that for the residents of Altamira. Another study, by Olivero et al, 50 in an auriferous area of Colombia, presented results similar to this work. The average mercury content found in the hair samples of 157 miners was of 2.83 mg g -1 with a maximum of 28.3 mg g -1 , while, in the control area an average of 1.33 mg g -1 was verified with a maximum content of 3.00 mg g -1 , close to values found in our work.…”

Section: Leadsupporting

confidence: 91%

“…However, the coefficient of variation is high when compared with values from the literature, such as in the work of Elivero et al 50 However, in the study of Foo and Tan, 45 carried out in Singapure and in Indonesia, mean values as high as our values were encountered. In the study of D'Ilio et al, 28 the level of Hg for an auriferous area was around 2.3 ± 1.2 mg g -1…”

Section: Leadcontrasting

confidence: 74%

See 1 more Smart Citation

Levels of As, Cd, Pb and Hg found in the hair from people living in Altamira, Pará, Brazil: environmental implications in the Belo Monte area

Carvalho¹,

Santos²,

Pereira³

et al. 2009

J. Braz. Chem. Soc.

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Amostras de cabelo foram utilizadas como bioindicador para avaliar os níveis de As, Cd, Pb e Hg na população residente na área "Volta Grande" do rio Xingu, no Norte do Brasil. As concentrações de As e Cd estão de acordo com os valores encontrados na literatura, no entanto, foram encontrados valores anômalos de Pb e Hg , o que pode sugerir uma variação inter-regional. Os elevados valores encontrados de Pb e Hg, em cabelos de moradores da Ilha do Canteiro, podem ser atribuídos à exposição ambiental das famílias, por estarem em uma área ambiental impactada pela mineração de ouro. A aplicação dos métodos de estatística multivariada mostrou que a concentração dos metais, estudados neste trabalho, pode ser classificatória entre pessoas de localidades diferentes do município de Altamira. Os resultados neste trabalho refletem o impacto ambiental destes elementos sobre a saúde dos habitantes desta área de garimpagem de ouro.Human hair was used as a bioindicator to evaluate the levels of As, Cd, Pb and Hg in the resident population of the "Volta Grande" area of the Xingu river, in the North of Brazil. The concentrations of As and Cd are in agreement with the values found in the literature, however, the Pb and Hg concentration is very different, which can suggest an inter-regional variation. Moreover, the high values found for these elements in the residents of the Canteiro Island can be attributed to environmental exposure of this population in an area with environmental impact from activities of gold mining. The application of these methods showed that the concentrations of the metals studied in this work can correctly classify two different localities in the Altamira district. The results reflect the impact of these elements on the health of the inhabitants of this auriferous area.Keywords: arsenic, cadmium, lead, mercury, hair, Altamira, environmental, chemometric methods, multivariate statistics IntroductionThe Amazon region possesses one of the biggest hydrographic basins of our planet. The construction of a hydroelectric dam in Monte Belo, Pará state, will help to resolve some of Brazil´s energy demand. However, its construction points to conflicts with respect to the socialeconomics of the environment and of the population living in Altamira and in other localities near the "Volta grande" area of the Xingu river, in the North of Brazil.The exploitation of hydroeletric energy implies a significant environmental impact that can not be neglected. The formation of the accumulation basin behind the dam will provoke flooding of the forests, the disappearance of important fauna from the submersed area as well as land used for agriculture, and villages and towns with traditional and cultural knowledge. The dam will also provoke displacement of the population, changes in the quality of the water, increases in production of gaseous carbon compounds (CO 2 , CH 4 ) and, nitrogen compounds) and other disruptions. 1,2All these environmental factors modify the biodisponibility of the metals in the aquatic environment and modifies...

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Section: Leadsupporting

confidence: 91%

Section: Leadcontrasting

confidence: 74%

Levels of As, Cd, Pb and Hg found in the hair from people living in Altamira, Pará, Brazil: environmental implications in the Belo Monte area

Carvalho¹,

Santos²,

Pereira³

et al. 2009

J. Braz. Chem. Soc.

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“…Generally, the authors found that garimpeiros had lower hair mercury levels than the ribeirinhos [58,94], concluding that because of their better economical situation, they were able to diversify their food, consuming less fish than the rest of the population[13]. However, in a few studies the garimpeiros or gold miners had higher total mercury levels in hair than the general population, without apparent relation with fish consumption frequency [45,57,95,96]. Consistently, in those three studies the hair mercury means in the general population were lower than those found in most central Amazonian studies.…”

Section: Resultsmentioning

confidence: 99%

“…Consistently, in those three studies the hair mercury means in the general population were lower than those found in most central Amazonian studies. In both the Bolivian study and the Colombian study, hair mercury means remained below 6 μg/g, even in the most exposed groups [57,95]. It would be possible to assume that metallic mercury exposure can acquire significance in hair mercury levels in some specific situations of low methylmercury exposure.…”

Section: Resultsmentioning

confidence: 99%

Hair mercury levels in Amazonian populations: spatial distribution and trends

Barbieri

Gardon

2009

International Journal of Health Geographics

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BackgroundMercury is present in the Amazonian aquatic environments from both natural and anthropogenic sources. As a consequence, many riverside populations are exposed to methylmercury, a highly toxic organic form of mercury, because of their intense fish consumption. Many studies have analysed this exposure from different approaches since the early nineties. This review aims to systematize the information in spatial distribution, comparing hair mercury levels by studied population and Amazonian river basin, looking for exposure trends.MethodsThe reviewed papers were selected from scientific databases and online libraries. We included studies with a direct measure of hair mercury concentrations in a sample size larger than 10 people, without considering the objectives, approach of the study or mercury speciation. The results are presented in tables and maps by river basin, displaying hair mercury levels and specifying the studied population and health impact, if any.ResultsThe majority of the studies have been carried out in communities from the central Amazonian regions, particularly on the Tapajós River basin. The results seem quite variable; hair mercury means range from 1.1 to 34.2 μg/g. Most studies did not show any significant difference in hair mercury levels by gender or age. Overall, authors emphasized fish consumption frequency as the main risk factor of exposure. The most studied adverse health effect is by far the neurological performance, especially motricity. However, it is not possible to conclude on the relation between hair mercury levels and health impact in the Amazonian situation because of the relatively small number of studies.ConclusionsHair mercury levels in the Amazonian regions seem to be very heterogenic, depending on several factors. There is no obvious spatial trend and there are many areas that have never been studied. Taking into account the low mercury levels currently handled as acceptable, the majority of the Amazonian populations can be considered exposed to methylmercury contamination. The situation for many of these traditional communities is very complex because of their high dependence on fish nutrients. It remains difficult to conclude on the Public Health implication of mercury exposure in this context.

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“…Exposure to mercury vapors during extractive work primarily affects the central nervous system and renal and thyroid functions [17]. Exposure to the organic form generates problems that mainly involve the neurodevelopment of the population living in areas surrounding the gold mines, which explains why the effects are more evident in children of mothers who are exposed to methylmercury in their diet [18,19,20,21,22,23,24]. …”

Section: Introductionmentioning

confidence: 99%

Exposure to Mercury in Workers and the Population Surrounding Gold Mining Areas in the Mojana Region, Colombia

Díaz¹,

Muñoz-Guerrero²,

Palma-Parra³

et al. 2018

IJERPH

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In Colombia, the inhabitants of the Mojana region have historically been subjected to high levels of environmental and occupational exposure to mercury; however, there are few robust data on the magnitude of this exposure and associated factors. This study aimed to describe the levels of mercury in the workers and inhabitants in this region, and to identify the main sociodemographic and occupational factors that are associated with this exposure. A cross-sectional study was conducted, in which mercury levels were determined in biological samples (blood, urine, hair) from 1119 people in the Mojana region. A questionnaire was also administered, which was adapted from the Global Mercury Assessment. Linear regression models were adjusted for the natural logarithm of mercury levels in blood, urine, and hair, using the factors that were explored as independent variables. The study reports high mercury levels in 35.0% of blood samples (95% CI 31.9–38.1%), 28.8% (95% CI 24.9–32.8%) of urine samples, and 56.3% (95% CI 53.1–59.5%) of hair samples. The reported source of water for consumption was associated with high levels of mercury (p-value < 0.05). We provide evidence of high levels of mercury exposure for the population in the Mojana region.

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Mercurio en cabello de diferentes grupos ocupacionales en una zona de minería aurifera en el Norte de Colombia

Cited by 33 publications

References 6 publications

Levels of As, Cd, Pb and Hg found in the hair from people living in Altamira, Pará, Brazil: environmental implications in the Belo Monte area

Levels of As, Cd, Pb and Hg found in the hair from people living in Altamira, Pará, Brazil: environmental implications in the Belo Monte area

Hair mercury levels in Amazonian populations: spatial distribution and trends

Exposure to Mercury in Workers and the Population Surrounding Gold Mining Areas in the Mojana Region, Colombia

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