Inverse modeling of the biodegradation of emerging organic contaminants in the soil-plant system

被引:25
|
作者
Hurtado, Carlos [1 ]
Trapp, Stefan [2 ]
Bayona, Josep M. [1 ]
机构
[1] IDAEA CSIC, Dept Environm Chem, Jordi Girona 18-26, E-08034 Barcelona, Spain
[2] Tech Univ Denmark, Bygningstorvet Bd 115, DK-2800 Lyngby, Denmark
关键词
Dissipation; Kinetics; Plants; Model; Emerging organic contaminants; PERSONAL CARE PRODUCTS; HEALTH-RISK ASSESSMENT; WASTE-WATER; ENVIRONMENTAL FATE; PESTICIDE DISSIPATION; HALF-LIVES; MANURE AMENDMENTS; FIELD DISSIPATION; PHARMACEUTICALS; BIOSOLIDS;
D O I
10.1016/j.chemosphere.2016.04.134
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Understanding the processes involved in the uptake and accumulation of organic contaminants into plants is very important to assess the possible human risk associated with. Biodegradation of emerging contaminants in plants has been observed, but kinetical studies are rare. In this study, we analyse experimental data on the uptake of emerging organic contaminants into lettuce derived in a greenhouse experiment. Measured soil, root and leaf concentrations from four contaminants were selected within the applicability domain of a steady-state two-compartment standard plant uptake model: bisphenol A (BPA), carbamazepine (CBZ), triclosan (TCS) and caffeine (CAF). The model overestimated concentrations in most cases, when no degradation rates in plants were entered. Subsequently, biodegradation rates were fitted so that the measured concentrations were met. Obtained degradation kinetics are in the order, BPA < CAF approximate to TCS < CBZ in roots, and BPA approximate to TCS < CBZ << CAF in leaves. Kinetics determined by inverse modeling are, despite the inherent uncertainty, indicative of the dissipation rates. The advantage of the procedure that is additional knowledge can be gained from existing experimental data. Dissipation kinetics found via inverse modeling is not a conclusive proof for biodegradation and confirmation by experimental studies is needed. (C) 2016 Published by Elsevier Ltd.
引用
收藏
页码:236 / 244
页数:9
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