In vitro bioaccessibility, phase partitioning, and health risk of potentially toxic elements in dust of an iron mining and industrial complex

Soltani, Naghmeh; Keshavarzi, Behnam; Moore, Farid; Cave, Mark; Sorooshian, Armin; Mahmoudi, Mohammad Reza; Ahmadi, Mohammad; Golshani, Reza

doi:10.1016/j.ecoenv.2021.111972

Cited by 26 publications

(11 citation statements)

References 46 publications

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“…It should be noted that median content of Fe (29.6%) in the living area dust sampled near stevedoring of iron ore (<1 km) was only 2 times lower than respective content in the characteristic dust of stevedored iron ore (B'Fe is 65%). Only Soltani et al [73] reported a 20% Fe content in the outdoor TSP in the environment of Gol-E-Gohar mining and industrial complex.…”

Section: Main Geochemical Characteristics Of Dustmentioning

confidence: 99%

Geochemistry of the Dust Collected by Passive Samplers as a Tool for Search of Pollution Sources: The Case of Klaipėda Port, Lithuania

et al. 2021

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Geochemical investigations of total suspended particulates (TSP) help detect hotspots and emission sources in port cities with stevedoring operations. The aim was to reveal these sources via geochemical indices (gI). TSP were collected in Klaipėda using original passive samplers in ten sites during four periods, during one of them, in ten additional sites near iron ore stevedoring (IOS). The contents of 22 elements (PHEs, crustal, Br, Cl) were determined by EDXRF in TSP and characteristic dust (CD) of stevedored iron ore, apatite, phosphorite, potassium fertilizers, and in waste incineration ash. Median Fe content in TSP near IOS was ~29%. The significant anthropogenic origin of clusters Fe–Cr, Sr–P, V–Ni–Zn–Cu, Pb–As, and Mg–Ca, Br–S–Cl was confirmed by gI mapping and analysis of CD. Significant temporal variability of Cl, S, Sr, Ni, Br, V, and Zn due to weather changes was revealed. Near IOS, significantly higher values of gI were found for Fe and Cr, while far from IOS, for K, Sr, Ti, Rb, Cu, Al, Si, Zr, Ca, Mg. Significantly higher values of normalized enrichment factor near IOS were not only for Fe and Cr, but also for As, Pb, S, Mn, Br, and Cl.

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Section: Main Geochemical Characteristics Of Dustmentioning

confidence: 99%

Geochemistry of the Dust Collected by Passive Samplers as a Tool for Search of Pollution Sources: The Case of Klaipėda Port, Lithuania

et al. 2021

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“…In vitro oral bioaccessibility: The oral bioaccessibility of As, Cd, Co, Cr, Cu, Fe, and Pb was assessed using the widely employed and validated in vitro extraction method, the unified bioaccessible assay (UBM) [15]. The UBM assay was applied in the <250 µm granulometric road dust fraction.…”

Section: Sample Collection and Preparationmentioning

confidence: 99%

Metal(Loids) Bioaccessibility in Road Dust from the Surrounding Villages of an Active Mine

et al. 2021

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Human activities, in general, cause a significant impact on the environment and human health. The present study aims to characterize the road dust of villages located near an active mine and to assess metal(loids) bioaccessible fractions. From the collected road dust samples (<250 µm fraction), the pseudo total, gastric (G) and gastrointestinal (GI) phase (UBM assay) concentrations, mineralogical composition, enrichment factor (EF), and risk for humans were determined. The obtained results revealed that arsenic represents the highest risk to humans, with mean pseudototal values higher than the maximum reference value range. The enrichment factor pointed to As as having significant to very high enrichment in all of the villages. In addition, Cd presented the maximum EF values in all of the villages, and was thus classified as having a very high enrichment. Particles enriched in As, Ca, Fe, Cu, Al, and Ti were identified by SEM-EDS in weathered agglomerates, and were linked to mine wastes and long-distance transport through both wind and/or traffic. The arsenic bioaccessibility fraction (%BAF) presented low values in the studied samples, possibly because of the low complex solubility of Fe with adsorbed As, limiting the release of arsenic and reducing its bioaccessibility. The concentrations of bioaccessible Cd for the G and GI phases were within the reference range, while for Cu, they were above and for Pb they were lower than the reference value range. The results show that the pseudototal fraction risk is overestimated when compared with BAF%; nevertheless, the total G and GI risks were above the carcinogenic target risk (1 × 10−6) in most of the samples. The carcinogenic risk of the bioaccessible contaminants showed that As represented the higher risk for developing cancer over a lifetime, with ingestion being the main risk route.

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“…In vitro oral bioaccessibility: Oral bioaccessibility of As, Cd, Co, Cr, Cu, Fe and Pb was assessed using the widely employed and validated in vitro extraction method, the unified bioaccessible assay (UBM) [15]. The UBM assay was applied in the < 250 µm granulometric road dust fraction.…”

Section: Samples Collection and Preparationmentioning

confidence: 99%

Metal(loids) Bioaccessibility in Road Dusts from the Surrounding Villages of an Active Mine

Candeias¹,

Ávila²,

Silva³

et al. 2021

Preprint

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Aiming the characterization of road dusts on the surrounding villages of an active mine and to assess metal(loids) bioaccessible fractions, a dust samples survey was undertaken. To achieve these objectives, pseudototal element concentration, mineralogical composition, Enrichment factor and in vitro extraction UBM assay for both gastric (G) and gastrointestinal (GI) phases, were determined. Results obtained revealed that arsenic represents the higher risk to humans, with mean pseudototal values higher than the maximum reference value range. Enrichment factor points to As significant to very high enrichment in all villages. Particles enriched in As, Ca, Fe, Cu, Al, Ti were identified by SEM-EDS in weathered agglomerates, linked to mine wastes and long-distance transport, both by wind and/or traffic. Arsenic bioaccessibility fraction (%BAF) presents low values in the studied samples, possibly due to low Fe complexes solubility with adsorbed As, limiting arsenic release and reducing its bioaccessibility. Concentrations of Cd bioaccessible G and GI phases are within the reference values range, while for Cu are above and for Pb are lower, than reference value range. Results show that the pseudototal fraction risk is overestimated when comparing to BAF (bioaccessible fraction), nevertheless, total G and GI risk are above the carcinogenic target risk (1.00E-06) in most samples. Carcinogenic risk of the bioaccessible contaminants shows that As is the element that represents higher risk for developing cancer over a lifetime, being ingestion the main risk route.

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In vitro bioaccessibility, phase partitioning, and health risk of potentially toxic elements in dust of an iron mining and industrial complex

Cited by 26 publications

References 46 publications

Geochemistry of the Dust Collected by Passive Samplers as a Tool for Search of Pollution Sources: The Case of Klaipėda Port, Lithuania

Geochemistry of the Dust Collected by Passive Samplers as a Tool for Search of Pollution Sources: The Case of Klaipėda Port, Lithuania

Metal(Loids) Bioaccessibility in Road Dust from the Surrounding Villages of an Active Mine

Metal(loids) Bioaccessibility in Road Dusts from the Surrounding Villages of an Active Mine

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