Stabilized nanoscale zerovalent iron (NZVI) has been studied to treat pollutants recently. In order to prevent aggregation of nanoparticles, particle stabilization has been practiced by attaching a stabilizer onto the NZVI. However, the reactivity of NZVI was reduced due to surface coating. This study presents the treatment of pentachlorophenol (PCP) using NZVI with the assistance of ultrasonication. Removal efficiency of PCP was 56 % in 2 hours by ultrasound-dispersed NZVI while only 8 % and 11 % were found by sole sonication and NZVI process in 4 hours, respectively. With the assistance of ultrasonication, the removal rate of PCP with NZVI was accelerated due to the well dispersion of NZVI by ultrasonication, and enhanced the chloride release. The reaction mechanism and kinetics under different environmental conditions were performed. The combination of ultrasonication to NZVI could be a direct system to investigate the degradation reaction of halogenated compounds with fine-sized NZVI.

Degradation of pentachlorophenol by well-suspended zerovalent iron nanoparticles

244th National Meeting (2012)

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