Phenanthrene degradation using Fe(III)-EDDS photoactivation under simulated solar light: A model for soil washing effluent treatment

Yufang Tao (1) , Marcello Brigante (2) , Hui Zhang (1) , Gilles Mailhot (2)

1 School of Resources and Environmental Science, Wuhan University
2 ICCF - Institut de Chimie de Clermont-Ferrand

In this work, for the first time, the nonionic surfactant polyoxyethylene-(20)-sorbitan monooleate (Tween 80, C 64 H 124 O 26) aided soil washing effluent was treated by enhanced activation of persulfate (PS) using Fe(III)-EDDS (EDDS: ethylenediamine-N, N-disuccinic acid) complexes under simulated solar light irradiation. The performance of this system was followed via the production and reactivity of radical species (SO 4 •-, HO • , Cl 2 •-) and degradation of phenanthrene (PHE) used as a model pollutant in soils. Different physico-chemical parameters such as the concentration of reactive species and pH were investigated through the PHE degradation efficiency. The second-order rate constants of the reactions for generated radicals with PHE and Tween 80 in solution were identified through competitive reaction experiments under steady-state conditions and application of nanosecond laser flash photolysis (LFP) as well. A kinetic approach was applied to assess the selectivity

Domaines: Chimie

Yufang Tao, Marcello Brigante, Hui Zhang, Gilles Mailhot. Phenanthrene degradation using Fe(III)-EDDS photoactivation under simulated solar light: A model for soil washing effluent treatment. Chemosphere, 2019, 236, pp.124366. ⟨10.1016/j.chemosphere.2019.124366⟩. ⟨hal-02470626⟩