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KMID : 0385520100230060560
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Analytical Science & Technology
2010 Volume.23 No. 6 p.560 ~ p.565
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Reduction of perchlorate in aqueous solution using zero valence iron stabilized with alginate bead
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Joo Tae-Kyeong
Lee Jong-Chol
Paeng Ki-Jung
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Abstract
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Perchlorate ion (ClO₄?) 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 Ca2+ 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.
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KEYWORD
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perchlorate ion, zero-valent iron, alginate bead, reduction catalyst
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