As and Pb bioaccesibility in polluted soils from a mining site under semiarid climate in Mexico

Carrizales, Leticia; Castro, Javier Andrés; Monroy, Marcos; D√≠az-Barriga, F; T√©llez, J; Razo, I

doi:10.1201/9780203021637.ch21

Cited by 6 publications

(2 citation statements)

References 10 publications

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“…Naranjo-Pulido et al (2002) determined As contents in an abandoned mining zone of Baja California Sur. Bioaccessibility experiments in soils of the mining district of Santa Maria de la Paz in San Luis Potosí state, developed by Razo et al (2004b), showed more than 4 times As bioaccessibility determined by the PBET method (simulation of the human digestion process) in soils impacted by a smelter with respect to those impacted by mine wastes.…”

Section: Arsenic Discoveries In Groundwater Of Mexicomentioning

confidence: 99%

One century of arsenic exposure in Latin America: A review of history and occurrence from 14 countries

Bundschuh

Litter

Parvez

et al. 2012

Science of The Total Environment

452

231

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Section: Arsenic Discoveries In Groundwater Of Mexicomentioning

confidence: 99%

One century of arsenic exposure in Latin America: A review of history and occurrence from 14 countries

Bundschuh

Litter

Parvez

et al. 2012

Science of The Total Environment

452

231

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“…Upon emission, galena (PbS) comes into contact with environmental elements such as air and water, which accelerate its weathering and facilitate the subsequent development of lead phases, such as PbSO 4 and PbCO 3(Benvenuti et al, 2000;Razo et al, 2004). This weathering process transforms galena into lead phases characterized by higher lead (Pb) contents and enhanced bioaccessibility compared to the original galena.…”

mentioning

confidence: 99%

Physical and chemical characterization of Pb-rich particles from a Pb-Zn smelting and refining factory on the environment and health under semiarid conditions

JIMENEZ,

Roos-Muñoz,

Soto-Morales

et al. 2023

Preprint

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Metal-rich particles originating from non-ferrous metallurgical activities are the primary source of atmospheric metals. These particles vary in size, morphology, and elemental and mineral compositions and become integrated into urban environments alongside aerosols, dust, and soils. Over time, environmental influences cause these particles to weather, leading to alterations in composition, the development of secondary phases, and a significant impact on metal availability and toxicity compared to their initial state. This study focuses on lead (Pb)-rich particles emitted from the Met-Mex Peñoles complex, one of the world's largest Ag-Cd-Pb-Zn smelting and refining facilities, situated in Torreón, North Mexico, operating since 1901. Torreón is characterized by arid conditions, temperature fluctuations, and low humidity. Dry atmospheric particles were collected in 2015 and 2017 from Torreón's urban area within a 3 km radius of the Met-Mex Peñoles complex. Analysis techniques such as scanning electron microscopy (SEM), Energy Dispersive X-Ray Spectroscopy (EDS), and X-ray powder diffraction (XRD) were employed to determine the elemental composition and mineralogy of Pb-rich particles. SEM-EDS analysis revealed diverse Pb-rich particle sizes and morphologies with varying Pb and other element contents. XRD analysis confirmed the presence of Pb and Zn sulfides, Pb carbonates, Pb sulfate, and Pb oxides in urban dust, both as individual particles and agglomerates. Primary Pb minerals were linked to fugitive feed concentrates and smelter flue gas at Met-Mex Peñoles, while secondary Pb minerals resulted from direct emissions and weathering processes. Compared to galena, secondary Pb minerals like Pb carbonates, Pb sulfate, and Pb oxides exhibit higher chemical availability in the environment, posing greater risks to both the environment and human health. In summary, physical and chemical transformations in Pb-rich particles contribute to increased lead bioavailability and toxicity in urban dust, with substantial implications for environmental and human health. These findings underscore the potential consequences of lead-rich particle presence in urban areas.

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Arsenic and lead contamination in urban soils of Villa de la Paz (Mexico) affected by historical mine wastes and its effect on children’s health studied by micronucleated exfoliated cells assay

Gamiño-Gutiérrez

González-Pérez²,

Gonsebatt

et al. 2012

Environ Geochem Health

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Environmental geochemical and health studies were carried out in urban areas of Villa de la Paz, S.L.P. (Mexico), where mining activities have been developed for more of 200 years, leading to the pollution of surface soil by arsenic and heavy metals (Pb, Cd, Cu, Zn). The analysis of urban soils to determine total and bioaccessibility concentrations of As and Pb, demonstrated a combined contribution of the natural and anthropogenic concentrations in the site, at levels higher than the environmental guideline values that provoke a human health risk. Contour soil mapping confirmed that historical mine waste deposits without environmental control measures, are the main source of pollution soil by As and Pb in the site. Exposure (Pb in blood and As in urine) and effect (micronucleated exfoliated cells assay) biological monitoring were then carried out in the childhood population of the site and in a control site. The exposure biological monitoring demonstrated that at least 20-30 % of children presented Pb and As exposure values higher than the national and international maximum intervention values. The effect biomonitoring by MEC assay confirmed that there is a genotoxic damage in local childhood population that could be associated with the arsenic exposure in the site.

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As and Pb bioaccesibility in polluted soils from a mining site under semiarid climate in Mexico

Cited by 6 publications

References 10 publications

One century of arsenic exposure in Latin America: A review of history and occurrence from 14 countries

One century of arsenic exposure in Latin America: A review of history and occurrence from 14 countries

Physical and chemical characterization of Pb-rich particles from a Pb-Zn smelting and refining factory on the environment and health under semiarid conditions

Arsenic and lead contamination in urban soils of Villa de la Paz (Mexico) affected by historical mine wastes and its effect on children’s health studied by micronucleated exfoliated cells assay

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