The present work is part of the project conducted in the ENVIREN section, aiming to the validation of techniques for the clean up of PCB contaminated soils and sediments by means of integrated approaches. The purpose of this work was to optimize physical-chemical treatment of watery effluents obtained from the washing of a contaminated soil. In the washing treatment a nontoxic natural surfactant (soy-lecitin) was employied according to the procedure obtained in the frame of LITCAR OR6, and the resulting effluent was treated in a photocatalytic reactor having a different configuration as compared to the one used in the previous work. In addition, an innovative technique involving Fe0 nanoparticles has been tested for its effectiveness on PCBs. In particular, the work described below aimed on one hand at studying the effect of different configurations of the photocatalytic reactor on the overall yield of the process (glass beads coated with TiO2 were added instead of TiO2 powder), on the other hand at investigating the applicability of Zero Valent Iron (ZVI) nanoparticles, a strategy which turned successful in the degradation of chloro-phenols. When the photocatalytic strategy was applied PCB removal was encouraging and it was not dependent on the way through which the catalysts were supplied; on the contrary no detectable PCB degradation was observed by using Fe0 nanoparticles.
Improved and innovative approaches for the decontamination of effluents resulting from the washing of soils and sediments contaminated by PCBs
NEGRONI, ANDREA;PICINI, ALESSANDRA;ZANAROLI, GIULIO;CAMERA RODA, GIOVANNI;MARCHETTI, LEONARDO;FAVA, FABIO;
2009
Abstract
The present work is part of the project conducted in the ENVIREN section, aiming to the validation of techniques for the clean up of PCB contaminated soils and sediments by means of integrated approaches. The purpose of this work was to optimize physical-chemical treatment of watery effluents obtained from the washing of a contaminated soil. In the washing treatment a nontoxic natural surfactant (soy-lecitin) was employied according to the procedure obtained in the frame of LITCAR OR6, and the resulting effluent was treated in a photocatalytic reactor having a different configuration as compared to the one used in the previous work. In addition, an innovative technique involving Fe0 nanoparticles has been tested for its effectiveness on PCBs. In particular, the work described below aimed on one hand at studying the effect of different configurations of the photocatalytic reactor on the overall yield of the process (glass beads coated with TiO2 were added instead of TiO2 powder), on the other hand at investigating the applicability of Zero Valent Iron (ZVI) nanoparticles, a strategy which turned successful in the degradation of chloro-phenols. When the photocatalytic strategy was applied PCB removal was encouraging and it was not dependent on the way through which the catalysts were supplied; on the contrary no detectable PCB degradation was observed by using Fe0 nanoparticles.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
