Open AccessEffect of other anions on reduction of nitrate in water over Pd–In catalyst loaded on various supports
Author(s) -
Ikkou Mikami,
Takayuki Ishii,
Fusao Kitamura,
A. Masunaga
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/427/1/012004
Subject(s) - nitrate , chemistry , catalysis , adsorption , inorganic chemistry , chloride , decomposition , calcium nitrate , ion exchange , activated charcoal , selectivity , nuclear chemistry , calcium , ion , organic chemistry
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.