Incorporating oral bioaccessibility into human health risk assessment due to potentially toxic elements in extractive waste and contaminated soils from an abandoned mine site

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dc.contributor.authorMehta, Neha
dc.contributor.authorCipullo, Sabrina
dc.contributor.authorCocerva, Tatiana
dc.contributor.authorCoulon, Frederic
dc.contributor.authorDino, Giovanna Antonella
dc.contributor.authorAjmone-Marsan, Franco
dc.contributor.authorPadoan, Elio
dc.contributor.authorCox, Siobhan Fiona
dc.contributor.authorCave, Mark R.
dc.contributor.authorDe Luca, Domenico Antonio
dc.date.accessioned2020-04-30T14:20:43Z
dc.date.available2020-04-30T14:20:43Z
dc.date.issued2020-04-30
dc.description.abstractThe waste rock, tailings and soil around an abandoned mine site in Gorno (northwest Italy) contain elevated concentrations of potentially toxic elements (PTE) exceeding the permissible limits for residential uses. Specifically, the maximum concentrations of As, Cd, Pb, and Zn were 107 mg/kg, 340 mg/kg, 1064 mg/kg, and 148 433 mg/kg, respectively. A site-specific human health risk assessment (HHRA) was conducted for residential and recreational exposure scenarios, using an approach based on Risk Based Corrective Action (RBCA) method, refined by incorporating oral bioaccessibility data. Oral bioaccessibility analyses were performed by simulating the human digestion process in vitro (Unified BARGE Method). Detailed analysis of oral bioaccessible fraction (BAF i.e. ratio of bioaccessible concentrations to total concentrations on <250 μm fraction) indicated BAF of As (5-33%), Cd (72-98%), Co (24-42%), Cr (3-11%), Cu (25-90%), Ni (17-60%), Pb (16-88%) and Zn (73-94%). The solid phase distribution and mineralogical analyses showed that the variation of BAF is attributed to presence of alkaline calcareous rocks and association of PTE with a variety of minerals. The HHRA for ingestion pathway, suggested that bioaccessibility-corrected cancer risk reached up to 2.7 × 10−5 and 0.55 × 10−5 for residential and recreational senarios respectively (acceptable level is 1 × 10−5). The hazard index (HI) recalculated after incorporation of oral bioaccessible concentrations for a residential scenario ranged from 0.02 to 17.9. This was above the acceptable level (>1) for 50% of the samples, indicating potential human health risks. This study provides information for site-specific risk assessments and planning future research.en_UK
dc.identifier.citationMehta N, Cipullo S, Cocerva T, et al., (2020) Incorporating oral bioaccessibility into human health risk assessment due to potentially toxic elements in extractive waste and contaminated soils from an abandoned mine site. Chemosphere, Volume 255, September 2020, Article number 126927en_UK
dc.identifier.issn0045-6535
dc.identifier.urihttps://doi.org/10.1016/j.chemosphere.2020.126927
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/15421
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectAbandoned mine siteen_UK
dc.subjectBioaccessibilityen_UK
dc.subjectRisk assessmenten_UK
dc.subjectSolid phase distributionen_UK
dc.subjectPotentially toxic elements (PTE)en_UK
dc.subjectTriassic western southern Alps (Italy)en_UK
dc.titleIncorporating oral bioaccessibility into human health risk assessment due to potentially toxic elements in extractive waste and contaminated soils from an abandoned mine siteen_UK
dc.typeArticleen_UK

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