Catalytic reduction of high concentration nitrate-bearing industrial wastewater for ammonium recovery
The concept of NH4+/NH3 production from wastewater treatment for subsequent recovery and reuse has gained much attention in the past few years. The conversion of NO3− present in wastewater into NH4+/NH3 through catalytic reduction is a sustainable approach for resource utilization from wastewater. I...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universidad Autónoma de Madrid |
| Repositorio: | Biblos-e Archivo. Repositorio Institucional de la UAM |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.uam.es:10486/720124 |
| Acceso en línea: | http://hdl.handle.net/10486/720124 https://dx.doi.org/10.1021/acsestwater.4c00897 |
| Access Level: | acceso abierto |
| Palabra clave: | NO3− reduction ammonia Pd−Cu catalysts wastewater treatment pH control Química |
| Sumario: | The concept of NH4+/NH3 production from wastewater treatment for subsequent recovery and reuse has gained much attention in the past few years. The conversion of NO3− present in wastewater into NH4+/NH3 through catalytic reduction is a sustainable approach for resource utilization from wastewater. In the present work, the application of this technique to industrial wastewater with a high NO3−concentration is proposed. A good activity of Pd−Cu catalysts supported on carbon black was observed at high NO3− concentrations. Complete NO3− conversion was achieved in water with an initial concentration of1000 mg/L and a catalyst concentration of 0.93 g/L in a stirred reactor. Furthermore, an improvement in catalytic activity was obtained when the reactor was operated without pH control, resulting in an increase inNH4+ formation to 184 mg/L. Additionally, in successive 8-h reaction cycles with a reaction medium equivalent to that of industrial wastewater, a progressive decrease in catalytic activity was observed, which may be associated with a noticeable decrease in the Pd0/Pdn+ species ratio |
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