Regression models to predict water-soil heavy metals partition coefficients in risk assessment studies |
| |
Authors: | Carlon C Dalla Valle M Marcomini A |
| |
Institution: | Department of Environmental Sciences, University of Venice, Calle Larga Sta Marta, 2137, I-30123, Venice, Italy. |
| |
Abstract: | Risk assessment studies apply fate and transport models to predict the behaviour of chemicals in the environment. The definition of physico-chemical properties is crucial to predict the mobility of pollutants and heavy metals in particular within the environmental compartments. The conservative approach normally adopted at a screening level in attributing a value to the K(d) value, results in an extremely variable mobility in soil. In this paper a regression model to estimate rapidly the K(d) for heavy metals is proposed and applied to Pb, allowing a considerable reduction (3-4 orders of magnitude) of the estimation uncertainty. The application of a stepwise forward multiple regression to literature data provided a pH-dependent regression equation of the soil-water distribution coefficient (K(d)) for Pb: log K(d)=1.99+0.42 pH. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|