Effective catalytic removal of nitrates from drinking water: An unresolved problem?
| Autor: | Maria J. Fernandez-Torres, Francisco Ruiz-Beviá |
|---|---|
| Přispěvatelé: | Universidad de Alicante. Departamento de Ingeniería Química, Computer Optimization of Chemical Engineering Processes and Technologies (CONCEPT), Estudios de Transferencia de Materia y Control de Calidad de Aguas (ETMyCCA) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Difficult problem
020209 energy Strategy and Management 02 engineering and technology Catalytic reduction Residence time (fluid dynamics) Nitrate Industrial and Manufacturing Engineering Catalysis chemistry.chemical_compound 0202 electrical engineering electronic engineering information engineering Drinking water 0505 law General Environmental Science Waste management Renewable Energy Sustainability and the Environment 05 social sciences Industrial scale Treatment process Selective catalytic reduction Ingeniería Química chemistry 050501 criminology Ammonia byproduct Environmental science |
| Zdroj: | RUA. Repositorio Institucional de la Universidad de Alicante Universidad de Alicante (UA) |
| Popis: | Over the past 29 years there have been myriad research efforts into the catalytic removal of nitrates from drinking water. In this work, 147 papers published during that period have been examined from the point of view of the ability of catalysis to produce water that is suitable for human consumption as well as amenable to industrial scale-up at reasonable working conditions of temperature and residence time. After close examination of the aforementioned articles, it is evident that this methodology has fulfilled only half its aims: it is able to reduce the nitrate concentration to guideline levels for human consumption, but it inevitably produces concentrations of ammonia and nitrites that are beyond the accepted limits for safe consumption of water. It is sometimes recommended that catalysis be combined with an ancillary technique, such as adsorption, in order to eliminate the undesirable byproducts mentioned above. However, this implies resorting to extra treatment units at the industrial scale, thus making the whole treatment process more complex and expensive. Our conclusion is that the effective catalytic removal of nitrates from drinking water is a very difficult problem. |
| Databáze: | OpenAIRE |
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