ABSTRACT
The efficiency of wetlands in the control and attenuation of the environmental impact of some organic pollutants depends on the pollutant and environmental factors. The effect of redox conditions on the behavior of three chemically different organic pollutants (atrazine, 2,4-dichlorophenoxyacetic acid, and pentachlorophenol) was investigated during laboratory incubation under controlled condition in a loamy clay soil sampled in a wetland located at Grignon (Yvelines, France). The three molecules were l4C-labelled which allowed to follow the behaviour of the pollutants including their mineralization (measurement of l4C-CO2) and their residue evolution. The soil microflora degraded the three pollutant (atrazine, 2,4-dichlorophenoxyacetic acid, and pentachlorophenol) without complete mineralization and the major degradation products identified were respectively hydroxyatrazine, 4-chlorophenol and 2,4,5 trichlorophenol.
