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Effect of other anions on reduction of nitrate in water over Pd-In catalyst loaded on various supports

The effect of the presence of other anions on nitrate reduction was investigated using catalysts supported by TiO2 and nitrate adsorbents (calcium-chloride-treated charcoal and an anion exchange resin). When the TiO2-supported catalyst was used, the nitrate decomposition rate was greatly reduced in...

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Bibliographic Details
Published in:IOP conference series. Earth and environmental science 2020-01, Vol.427 (1), p.12004
Main Authors: Mikami, I, Ishii, T, Kitamura, F, Masunaga, A
Format: Article
Language:English
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Summary:The effect of the presence of other anions on nitrate reduction was investigated using catalysts supported by TiO2 and nitrate adsorbents (calcium-chloride-treated charcoal and an anion exchange resin). When the TiO2-supported catalyst was used, the nitrate decomposition rate was greatly reduced in the presence of Cl−, SO42−, and PO43−, and the decrease was large for Cl− and PO43−. The activity of the nitrate-adsorbent-supported catalysts in the presence of SO42− and PO43− showed a smaller decrease than that of the TiO2-supported catalyst. In the presence of SO42−, the amount of nitrate adsorbed on the supports was correlated with the decrease in activity, and calcium-chloride-treated charcoal, which has high nitrate adsorption selectivity, showed the smallest decrease in activity in the presence of SO42−. By contrast, in the presence of PO43−, no clear correlation was found between the decrease in the amount of nitrate adsorption on the supports and the decrease in activity.
ISSN:1755-1307
1755-1315
DOI:10.1088/1755-1315/427/1/012004