Cobalt distribution in the soils of São Miguel Island (Azores): From volcanoes to health effects

Linhares, Diana; Pimentel, Adriano; Borges, Cristina; Cruz, J. Virgílio; Garcia, Patrícia; Rodrigues, Armindo

doi:10.1016/j.scitotenv.2019.05.359

Cited by 18 publications

(11 citation statements)

References 25 publications

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“…Cobalt deficiency (or vitamin B-12 deficiency) in humans can lead to pernicious anemia and nerve damage. 6 On the other hand, excess cobalt can provoke numerous negative effects on central metabolism. 7,8 That is why its content in various samples should be monitored.…”

Section: Introductionmentioning

confidence: 99%

Extraction-Chromogenic System for Cobalt Based on 5-Methyl-4-(2-thiazolylazo) Resorcinol and Benzalkonium Chloride

Hristov

Racheva

Toncheva

et al. 2021

ACSi

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The interaction between CoII and 5-methyl-4-(2-thiazolylazo)-resorcinol (MTAR) was studied in a water-chloroform system, in the presence or absence of benzalkonium chloride (BZC) as a cationic ion-association reagent. The optimum pH, concentration of the reagents and extraction time for the extraction of Co were found. In the presence of BZC, the extracted ion-associate could be represented by the formula (BZ+)[CoIII(MTAR2–)2], where MTAR is in its deprotonated form. The following extraction-spectrophotometric characteristics were determined: absorption maximum, molar absorptivity, Sandell’s sensitivity, limit of detection, limit of quantification, constant of extraction, distribution ratio and fraction extracted. In the absence of BZC, the extraction is incomplete and occurs in a narrow pH range. The extracted chelate contains one deprotonated and one monoprotonated ligand: [CoIII(MTAR2–)(HMTAR–)].

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Section: Introductionmentioning

confidence: 99%

Extraction-Chromogenic System for Cobalt Based on 5-Methyl-4-(2-thiazolylazo) Resorcinol and Benzalkonium Chloride

Hristov

Racheva

Toncheva

et al. 2021

ACSi

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“…The volatile metals, released from active degassing areas, contribute to the continuous input of trace metals into the atmosphere (Bagnato et al 2011(Bagnato et al , 2014Hinkley et al 1999;Aiuppa et al 2003;Mather et al 2003;Pyle and Mather 2003). These metal inputs, with a high impact on water, soil and vegetation, and even on human health, reach high environmental concentrations in volcanic areas (Watt et al 2007;Allard et al 2000;Amaral et al 2006a;Parelho et al 2014;Linhares et al 2019). According to Amaral and coauthors (2008), the concentration of several trace metals in the hair of men from Furnas (a site with volcanic activity) was significantly higher compared to that of men from Santa Maria (a site without volcanic activity); nevertheless, in this study, the authors did not analyze mercury.…”

Section: Introductionmentioning

confidence: 99%

First record on mercury accumulation in mice brain living in active volcanic environments: a cytochemical approach

Navarro‐Sempere

Segovia

Rodrigues

et al. 2020

Environ Geochem Health

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The health effects of mercury vapor exposure on the brain in volcanic areas have not been previously addressed in the literature. However, 10% of the worldwide population inhabits in the vicinity of an active volcano, which are natural sources of elemental mercury emission. To evaluate the presence of mercury compounds in the brain after chronic exposure to volcanogenic mercury vapor, a histochemical study, using autometallographic silver, was carried out to compare the brain of mice chronically exposed to an active volcanic environment (Furnas village, Azores, Portugal) with those not exposed (Rabo de Peixe village, Azores, Portugal). Results demonstrated several mercury deposits in blood vessels, white matter and some cells of the hippocampus in the brain of chronically exposed mice. Our results highlight that chronic exposure to an active volcanic environment results in brain mercury accumulation, raising an alert regarding potential human health risks. These findings support the hypothesis that mercury exposure can be a risk factor in causing neurodegenerative diseases in the inhabitants of volcanically active areas.

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“…Although the coefficient of variation of Co was small, the I geo of Co reached the level of slightly polluted. It could be interrelated with human activities, such as combustion of fossil fuels and phosphate fertilizers application [76,77]. Based on Figure 3, Co is closer to the Cr-Ni-V-Mn group, indicating that Co originated partly from a natural source [78,79].…”

Section: Source Identification Of Heavy Metal(loid)smentioning

confidence: 98%

Environmental Risk Evaluation and Source Identification of Heavy Metal(loid)s in Agricultural Soil of Shangdan Valley, Northwest China

Zhuang

2020

Sustainability

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To understand the environmental quality and heavy metal(loid) pollution of farmlands in Shangdan Valley, the contents of macroelements (Na, K, Si, Mg, Ca, Al, Fe, Ti, P, S, Cl, Br) and heavy metal(loid)s (Cu, Pb, Zn, Mn, Ni, V, Co, Cr, As) were surveyed by the X-ray fluorescence method. The pollution degree and ecological risk of the heavy metal(loid)s were judged by the Nemerow synthetic pollution index, geo-accumulation index, and potential ecological risk index, and their sources were identified by the multivariate statistic method. The mean contents of nine heavy metal(loid)s in Shangdan Valley farmland soil exceeded their corresponding reference values. Soils were not contaminated with As, Cr, Mn, and Ni but were slightly contaminated with Co, Cu, Pb, V, and Zn. Their comprehensive pollution levels were moderate to serious. The ecological risk index of single heavy metal(loid) decreased in the sequence As > Pb > Co > Cu > Ni > V > Zn > Cr > Mn. The source analysis results indicated that Cu, Pb, Zn, and As were highly affected by anthropogenic inputs, e.g., metal smelting and agricultural activities, while Mn, Ni, Cr, and V were principally derived from a natural source. As for Co, it was affected by a mixture source of nature, fossil fuel combustion, and fertilizer.

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Cobalt distribution in the soils of São Miguel Island (Azores): From volcanoes to health effects

Cited by 18 publications

References 25 publications

Extraction-Chromogenic System for Cobalt Based on 5-Methyl-4-(2-thiazolylazo) Resorcinol and Benzalkonium Chloride

Extraction-Chromogenic System for Cobalt Based on 5-Methyl-4-(2-thiazolylazo) Resorcinol and Benzalkonium Chloride

First record on mercury accumulation in mice brain living in active volcanic environments: a cytochemical approach

Environmental Risk Evaluation and Source Identification of Heavy Metal(loid)s in Agricultural Soil of Shangdan Valley, Northwest China

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