Nitrate reduction with bimetallic catalysts. A stability-addressed overview
Entity
UAM. Departamento de Ingeniería QuímicaPublisher
ElsevierDate
2022-03-09Citation
10.1016/j.seppur.2022.120750
Separation and Purification Technology 290 (2022): 120750
ISSN
1383-5866 (print)DOI
10.1016/j.seppur.2022.120750Funded by
The authors wish to thank for the financial support the Spanish MINECO (PID2019-108445RB-I00) and Comunidad de Madrid (BIOTRES-CM, S2018/EMT-4344). I. Sanchis also thanks Comunidad de Madrid for award of a research grant (PEJD-265 2017-PRE/AMB-4616)Project
Gobierno de España. PID2019-108445RB-I00Editor's Version
https://doi.org/10.1016/j.seppur.2022.120750Subjects
Catalyst deactivation; Catalytic reduction; Nitrate; Regeneration; QuímicaRights
© 2022 The Author(s)Abstract
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.
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Google Scholar:Sanchis Pérez, Inés
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Díaz Nieto, Elena
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Pizarro, A. H.
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Rodríguez Jiménez, Juan José
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Fernández Mohedano, Ángel
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