首页|Nitrate reduction with bimetallic catalysts. A stability-addressed overview
Nitrate reduction with bimetallic catalysts. A stability-addressed overview
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NSTL
Nitrate (NO3~-) pollution of water bodies is a serious environmental problem worldwide. One of the major concerns about NO3~- contamination is the lack of cost-effective solutions for its removal from potential drinking water resources. Current technologies, such as ion exchange, reverse osmosis and electrodialysis, produce a reject with high NO3~- concentration. Catalytic reduction is an emerging technology, capable of transforming NO3" into harmless N2. A critical issue is to achieve almost complete selectivity to this last species so that the final concentrations of NO2~- and NH4~+ can fit the stringent allowed limits. Numerous studies have been carried out evaluating the activity and N2 selectivity of bimetallic catalysts. Catalyst deactivation by surface fouling, irreversible oxidation of the metal promoter, metal leaching and aggregation of metallic particles remain a major challenge for full-scale implementation of catalytic nitrate reduction. Therefore, it is necessary to develop highly stable catalyst and/or effective solutions for catalyst regeneration. The existing literature on this respect is reviewed hereby.
NSTL
