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Environmental Engineering Research 2005;10(4): 165-173. DOI: https://doi.org/10.4491/eer.2005.10.4.165
SYNTHESIS OF NANO-SIZED IRON FOR REDUCTIVE DECHLORINATION. 1. Comparison of Aerobic vs. Anaeriobic Synthesis and Characterization of Nanoparticles
Hocheol Song1, Elizabeth R. Carraway1, and Young-Hun Kim2
1Department of Environmental Engineering and Science, Clemson University 342 Computer Court, Anderson, SC 29625
2Department of Environmental Engineering, College of Engineering, Andong National University,Andong, KyungPook 760-749, Korea
Corresponding Author: Young-Hun Kim ,Tel: +82-054-820-5818, Fax: +82-054-820-6187 , Email: youngkim(a)andong.ac.kr
Received: February 14, 2005;  Accepted: July 14, 2005.
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ABSTRACT
Nano-sized iron particles were synthesized by reduction of FeJ* in aqueous solution under two reaction conditions, aerobic and anaerobic, and the reactivity of iron was tested by reaction with trichloroethene (TCE) using a batch system. Results showed that iron produced under anoxic condition for both synthesis and drying steps gave rise to iron with higher reduction reactivity, indicating the presence of oxygen is not favorable for production of nano-sized iron deemed to accomplish reactivity enhancement from particle sized reduction. Nano-sized iron sample obtained from the anoxic synthesis condition was further characterized using various instrumental measurements to identify particle morphology, composition, surface area, and particle size distribution. The scanning electron microscopic (SEM) image showed that synthesized particles were uniform, spherical particles (< 100 nm), and aggregated into various chain structures. The effects of other synthesis conditions such as solution pH, initial Fe3+ concentration, and reductant injection rate on the reactivity of nano-sized iron, along with standardization of the synthesis protocol, are presented in the companion paper.
Keywords: Zero-valent metals | Nano-scale iron | Synthesis condition | Anoxic | Reduction
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