Nitrate reduction by iron supported bimetallic catalyst in low and high nitrogen regimes

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In this study, the effect of initial nitrate loading on nitrate removal and byproduct selectivity was evaluated in a continuous system. Nitrate removal decreased from 100% to 25% with the increase in nitrate loading from 10 to 300 mg/L NO3-N. Ammonium selectivity decreased and nitrite selectivity increased, while nitrogen selectivity showed a peak shape in the same range of nitrate loading. The nitrate removal was enhanced at low catalyst to nitrate ratios and 100% nitrate removal was achieved at catalyst to nitrate ratio of ≥ 33 mg catalyst / mg NO3-N. Maximum nitrogen selectivity (47%) was observed at 66 mg catalyst / mg NO3-N, showing that continuous Cu-Pd-NZVI system has a maximum removal capacity of 37 mg NO3 - -N/gcatalyst /h. The results from this study emphasize that nitrate reduction in a bimetallic catalytic system could be sensitive to changes in optimized regimes.
Publisher
TECHNO-PRESS
Issue Date
2015-12
Language
English
Article Type
Article
Citation

ADVANCES IN ENVIRONMENTAL RESEARCH, v.4, no.4, pp.263 - 271

ISSN
2234-1722
DOI
10.12989/aer.2015.4.4.263
URI
http://hdl.handle.net/10203/205513
Appears in Collection
CE-Journal Papers(저널논문)
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