Lead bioaccessibility in topsoils from lead mineralisation and urban domains, UK.
Environ Pollut
; 178: 278-87, 2013 Jul.
Article
en En
| MEDLINE
| ID: mdl-23587858
ABSTRACT
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.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Suelo
/
Contaminantes del Suelo
/
Fenómenos Geológicos
/
Plomo
Tipo de estudio:
Prognostic_studies
País/Región como asunto:
Europa
Idioma:
En
Año:
2013
Tipo del documento:
Article