Determination of the bioaccessibility of chromium in Glasgow soil and the implications for human health risk assessment

Broadway, A.; Cave, Mark; Wragg, Joanna; Fordyce, F.M.; Bewley, R. J. F.; Graham, Margaret C.; Ngwenya, Bryne T.; Farmer, John G.

doi:10.1016/j.scitotenv.2010.09.007

Cited by 129 publications

(80 citation statements)

References 41 publications

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“…The average Cr data returned for the current study (n=10) was within the consensus values of 41 ± 1 and 5.8 ± 3.8 mg kg -1 for the 'gastric' and the 'gastro-intestinal' phase, respectively as reported by Broadway et al (2010). The average quality control data for BGS 102 for Ni and Zn were compared with the in-house BGS dataset generated by BGS research projects (Northampton, Swansea and T/Humber) which has not yet been published, but is monitored as part of a larger BGS database.…”

Section: Quality Controlsupporting

confidence: 79%

“…At present there are no certified values for the bioaccessibility of PTEs in reference materials however, the quality control material used in this study has been the subject of an international inter-laboratory trial and other studies (Broadway et al 2010;Wragg et al 2003;2009;, which have generated the consensus values against which the data from this study have been assessed. Within every batch of a maximum of ten soil samples from the study subset, one duplicate soil sample, one quality control soil and one blank were extracted.…”

Section: Quality Controlmentioning

confidence: 99%

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Bioaccessibility of trace elements in soils in Northern Ireland

Barsby

McKinley

Ofterdinger

et al. 2012

Science of The Total Environment

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Section: Quality Controlsupporting

confidence: 79%

Section: Quality Controlmentioning

confidence: 99%

Bioaccessibility of trace elements in soils in Northern Ireland

Barsby

McKinley

Ofterdinger

et al. 2012

Science of The Total Environment

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“…Drexler and Brattin (2007) 13. Broadway et al (2010) 14. Roussel et al (2010) that raising the pH in the intestinal phase should cause: (a) partial precipitation and enhanced adsorption on mineral colloids and higher absorption in organic matter of cations (i.e.…”

Section: Resultsmentioning

confidence: 99%

The relationship between soil geochemistry and the bioaccessibility of trace elements in playground soil

Miguel

Mingot

Chacón

et al. 2012

Environ Geochem Health

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A total of 32 samples of surficial soil were collected from 16 playground areas in Madrid (Spain), in order to investigate the importance of the geochemistry of the soil on subsequent bioaccessibility of trace elements. The in vitro bioaccessibility of As, Co, Cr, Cu, Ni, Pb and Zn was evaluated by means of two extraction processes that simulate the gastric environment and one that reproduces a gastric + intestinal digestion sequence. The results of the in vitro bioaccessibility were compared against aqua regia extractions ("total" concentration), and it was found that total concentrations of As, Cu, Pb and Zn were double those of bioaccessible values, whilst that of Cr was ten times higher. Whereas the results of the gastric + intestinal extraction were affected by a high uncertainty, both gastric methods offered very similar and consistent results, with bioaccessibilities following the order:As -Cu -Pb -Zn > Co > Ni > Cr, and ranging from 63 to 7 %. Selected soil properties including pH, organic matter, Fe and CaCC>3 content were determined to assess their influence on trace element bioaccessibility, and it was found that Cu, Pb and Zn were predominantly bound to organic matter and, to a lesser extent, Fe oxides. The former fraction was readily accessible in the gastric solution, whereas Fe oxides seemed to recapture negatively charged chloride complexes of these elements in the gastric solution, lowering their bioaccessibility. The homogeneous pH of the playground soils included in the study does not influence trace element bioaccessibility to any significant extent except for Cr, where the very low gastric accessibility seems to be related to the strongly pH-dependent formation of complexes with organic matter. The results for As, which have been previously described and discussed in detail in Mingot et al. (Chemosphere 84: 1386-1391, indicate a high gastric bioaccessibility for this element as a consequence of its strong association with calcium carbonate and the ease with which these bonds are broken in the gastric solution. The calculation of risk assessments are therefore dependant on the methodology used and the specific environment they address. This has impacts on management strategies formulated to ensure that the most vulnerable of society, children, can live and play without adverse consequences to their health.

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“…The samples from London were selected primarily to cover the wide range of total Pb concentrations, whilst those from Swansea and Northampton were selected to represent a range of Pb and As concentrations; the results of the As bioaccessibility in UK urban soils will be published in a separate paper. Data for regression modelling in the Glasgow area is for the G-BASE samples reported in Broadway et al (2010) and page 7 of 35 Farmer et al, (2011) which were originally selected to provide a range of total Cr, Pb or As concentrations. Summary statistics for all the samples from the four urban areas are reported in Flight and Scheib (2011).…”

Section: Sample Selectionmentioning

confidence: 99%

“…A significant proportion of the urban landscape in Great Britain has elevated topsoil concentrations of lead (Pb; Rawlins et al, 2005;Thums et al, 2008;Broadway et al, 2010;Farmer et al, 2011;Flight and Scheib, 2011). In a study of the background concentrations of potentially harmful elements (PHEs) in soils in England, Cave et al (2012) and Ander et al (2012) used a classification based on the ratio of built to open space to show that 4% of the land area could be classified as Urban and that systematically surveyed soil samples in this category (n=7529) had median and 95 th percentile lead concentrations of 170 mg kg -1 and 790 mg kg -1 respectively.…”

Section: Introductionmentioning

confidence: 99%

Modelling lead bioaccessibility in urban topsoils based on data from Glasgow, London, Northampton and Swansea, UK

Appleton

Cave

Wragg

2012

Environmental Pollution

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Predictive linear regression (LR) modelling between bioaccessible Pb and a range of total elemental compositions and soil properties was executed for the Glasgow, London, Northampton and Swansea urban areas in order to assess the potential for developing a national urban bioaccessible Pb dataset for the UK. LR indicates that total Pb is the only highly significant independent variable for estimating the bioaccessibility of Pb.Bootstrap resampling shows that the relationship between total Pb and bioaccessible Pb is broadly the same in the four urban areas. The median bioaccessible fraction ranges from 38% in Northampton to 68% in London and Swansea. Results of this study can be used as part of a lines of evidence approach to localised risk assessment but should not be used to replace bioaccessibility testing at individual sites where local conditions may vary considerably from the broad overview presented in this study. Capsule AbstractTotal Pb is the only significant predictor for bioaccessible Pb in topsoils from four urban areas in the UK.

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Determination of the bioaccessibility of chromium in Glasgow soil and the implications for human health risk assessment

Cited by 129 publications

References 41 publications

Bioaccessibility of trace elements in soils in Northern Ireland

Bioaccessibility of trace elements in soils in Northern Ireland

The relationship between soil geochemistry and the bioaccessibility of trace elements in playground soil

Modelling lead bioaccessibility in urban topsoils based on data from Glasgow, London, Northampton and Swansea, UK

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