Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 433309
Title Risk assessment for Cd, Cu, Pb, and Zn in urban soils: chemical availability as the central concept
Author(s) Rodrigues, S.R.; Cruz, N.; Coelho, C.; Henriques, B.; Carvalho, L.; Duarte, A.C.; Pereira, E.; Römkens, P.F.A.M.
Source Environmental Pollution 183 (2013). - ISSN 0269-7491 - p. 234 - 242.
DOI https://doi.org/10.1016/j.envpol.2012.10.006
Department(s) Soil Science Centre
Alterra - Sustainable soil management
Publication type Refereed Article in a scientific journal
Publication year 2013
Keyword(s) potentially toxic elements - 5 european cities - heavy-metals - contaminated soils - trace-elements - extraction - bioaccessibility - pools - bioavailability - extractability
Abstract To assess the geochemical reactivity and oral bioaccessibility of Cd, Cu, Pb and Zn in urban soils from the Porto area, four extractions were performed including Aqua Regia (AR; pseudototal), 0.43 M HNO(3) (reactive), 0.01 M CaCl(2) (available), and 0.4 M glycine at pH = 1.5, SBET method (oral bioaccessible pool). Oral bioaccessibility in urban soils was higher than in samples from rural, industrial and mining areas which is most likely related to sources of metals and parent materials of corresponding soils. The availability and reactivity were described well by non-linear Freundlich-type equations when considering differences in soil properties. The resulting empirical models are able to predict availability and reactivity and can be used to improve the accuracy of risk assessment. Furthermore, a close 1:1 relationship exists between results from the 0.43 M HNO(3) method and the SBET method which substantially facilitates risk assessment procedures and reduces analytical costs.
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