Chemical reduction of pentachlorophenol by nanoscale zero-valent iron

ENVR 141

Meng-yi Chen, Department of Soil and Environmental Sciences, National Chung Hsing University, 250 Kuo-Kuang Rd., Taichung 402, Taiwan and Yang-hsin Shih, yhs@nchu.edu.tw, Department of Soil and Environmental Sciences and Center of Nanoscience and Nanotechnology, National Chung Hsing University, 250 Kuo-Kuang Rd., Taichung 402, Taiwan.
Nanoscale nano-valent iron (NZVI) is a new generation of environmental remediation material that can perform a high reduction reactivity to halogenated compounds. Pentachlorophenol (PCP), a carcinogenic compound, could be a significant threat to humans and aquatic ecosystems in the contaminated area. Removal of pentachlorophenol by NZVI in batch systems was performed to evaluate the potential to use NZVI to remediate the contaminated sites. The reaction rate follows pseudo-first-order reaction kinetics. Rapid dechlorination was observed during the experiment time followed by a gradual decrease. Increasing the dose of iron greatly increased the dehalogenation rate. The degradation pathways of PCP by the NZVI were proposed in this study. The results suggested the stepwise dechlorination processes occurred on the NZVI particles. The high reactivity of NZVI suggests it can be a potential remediation agent for PCP in the environment.
 

General Papers
6:00 PM-8:00 PM, Wednesday, August 22, 2007 BCEC -- Exhibit Hall - B2, Poster

Division of Environmental Chemistry

The 234th ACS National Meeting, Boston, MA, August 19-23, 2007