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http://dx.doi.org/10.5806/AST.2010.23.6.560

Reduction of perchlorate in aqueous solution using zero valence iron stabilized with alginate bead  

Joo, Tae-Kyeong (Dept. of Chemistry, Yonsei University)
Lee, Jong-Chol (Agency For Defence Development)
Paeng, Ki-Jung (Dept. of Chemistry, Yonsei University)
Publication Information
Analytical Science and Technology / v.23, no.6, 2010 , pp. 560-565 More about this Journal
Abstract
Perchlorate ion ($ClO_4^-$) has been widely used as oxidizing agent in military weapon system such as rocket and missile fuel propellant. So it has been challenging to remove the pollutant of perchlorate ion. nanoscale zero valence iron (nZVI) particles are widely employing reduction catalyst for decomposition of perchlorate ion. nZVI particles has increasingly been utilized in groundwater purification and waste water treatment. But it have strong tendency of aggregation, rapid sedimentation and limited mobility. In this study, we focused on reduction of perchlorate ion using nZVI particles immobilized in alginate polymer bead for stabilization. The stabilized nZVI particles displayed much greater surface area, and much faster reaction rates of reduction of perchlorate ion. In this study, an efficient way to immobilize nZVI particles in a support material, alginate bead, was developed by using $Ca^{2+}$ as the cross-linking cations. The efficiency and reusability of the immobilized Fe-alginate beads on the reduction of perchlorate was tested at various temperature conditions.
Keywords
perchlorate ion; zero-valent iron; alginate bead; reduction catalyst;
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