Lead bioaccessibility in topsoils from lead mineralisation and urban domains, UK

Appleton, J.D.; Cave, M.R.; Palumbo-Roe, B.; Wragg, J.. 2013 Lead bioaccessibility in topsoils from lead mineralisation and urban domains, UK. Environmental Pollution, 178. 278-287. 10.1016/j.envpol.2013.03.028

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Predictive linear regression (LR) modelling indicates that total Pb is the only highly significant independent variable for estimating Pb bioaccessibility in “mineralisation domains” located in limestone (high pH) and partly peat covered (low pH) shale-sandstone terrains in England. Manganese is a significant minor predictor in the limestone terrain, whilst organic matter and sulphur explain 0.5% and 2% of the variance of bioaccessible Pb in the peat-shale-sandstone terrain, compared with 93% explained by total Pb. Bootstrap resampling shows that LR confidence limits overlap for the two mineralised terrains but the limestone terrain has a significantly lower bioaccessible Pb to total Pb slope than the urban domain. A comparison of the absolute values of stomach and combined stomach-intestine bioaccessibility provides some insight into the geochemical controls on bioaccessibility in the contrasting soil types.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1016/j.envpol.2013.03.028
ISSN: 02697491
Date made live: 18 Oct 2013 14:31 +0 (UTC)

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