DECA: A new model for assessing the foliar uptake of atmospheric lead by vegetation, using Lactuca sativa as an example

JOURNAL OF ENVIRONMENTAL MANAGEMENT

卷:112

Article

Schreck, E.^1,2  Bonnard, R.³  Laplanche, C.^1,2  Leveque, T.^1,2,4  Foucault, Y.^1,2,4  Dumat, C.^1,2 

[1] Univ Toulouse, EcoLab Lab Ecol Fonct & Environm, INP, UPS,ENSAT, F-31326 Castanet Tolosan, France

[2] CNRS, EcoLab, F-31326 Castanet Tolosan, France

[3] INERIS, F-60550 Verneuil En Halatte, France

[4] STCM, F-31200 Toulouse, France

关键词: Lead;    Foliar uptake;    Modelling;    Atmospheric particulate matter;    Lettuce;    Health risk assessment;   

DOI  :  10.1016/j.jenvman.2012.07.006

来源: Elsevier

【 摘 要 】

In the context of pen-urban atmospheric pollution by industrial lead recycling emissions, metal can transfer to plant shoots. Home gardeners consuming their produce can therefore be exposed to metal pollution. The Human Health Risk Assessment Protocol (HHRAP) model from the United States Environmental Protection Agency (US EPA) classically used in risk assessment provides foliar metal uptake predictions for large farms but is not adapted to cultures in kitchen gardens. Thus, this study developed a new model, entitled DECA, which includes individually measured parameters and the washing of vegetables before human consumption. Results given by DECA and HHRAP models were compared with experimental measurements of lettuce. The data calculated by the DECA model were highly correlated with the measured values: the HHRAP model overestimates foliar lead uptake. Moreover, strong influences of factor of washing and time-dependent variations of loss coefficient were highlighted. Finally, the DECA model provided important risk assessment data regarding consumption of vegetables from kitchen gardens. (C) 2012 Elsevier Ltd. All rights reserved.

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