Zero-waste process for the transformation of a hazardous aluminum waste into a raw material to obtain zeolites
| Autor: | J. I. Robla, Sol López-Andrés, Aurora López-Delgado, Isabel Padilla, Maximina Romero |
|---|---|
| Přispěvatelé: | Ministerio de Economía y Competitividad (España) |
| Rok vydání: | 2020 |
| Předmět: |
Waste management
Renewable Energy Sustainability and the Environment Pilot-scaleZeolite A 020209 energy Strategy and Management Circular economy 05 social sciences Zero-waste process Zero waste 02 engineering and technology Raw material Industrial and Manufacturing Engineering Autoclave Hazardous waste 050501 criminology 0202 electrical engineering electronic engineering information engineering Environmental science Environmental impact assessment Zeolite Hazardous aluminum waste Effluent 0505 law General Environmental Science |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| ISSN: | 0959-6526 |
| DOI: | 10.1016/j.jclepro.2020.120178 |
| Popis: | A potential route to minimize the environmental impact of industrial activities is, among other approaches, the use of hazardous wastes as less-common raw materials for the preparation of other materials. Realistic technologies for waste management should include simple and low-cost processes as well as the nonproduction of new wastes. Thus, the total conversion of a type of hazardous aluminum waste into zeolite was achieved at the pilot-scale (200 l autoclave reactor) under mild hydrothermal operating conditions. In a one-step process, 3.2 tons of zeolite, 76.4 Nm of ammonia and 105.9 Nm of hydrogen can be produced per ton of aluminum waste. The process does not generate other wastes. The recycling of process effluents (mother liquor and rinse water), along with the process gases capture and its subsequent commercialization, would increase the environmental impact and the economic yield. The obtained Linde type-A zeolite, exhibited structural, textural and morphological characteristics similar to those of zeolites prepared from commercial reagents. A conceptual design for zero-waste process is proposed. The sustainable process developed can contribute to reduce the high environmental impact of aluminum industry waste, and contribute to the circular economy by converting a hazardous waste into a raw material. The authors thank Recuperaciones y Reciclajes Roman S.L. (Madrid, Spain) for supplying the aluminum waste, Clemente Roman S.L. (Segovia, Spain) for the use of its facilities and Dr. Sánchez-Hernández for her invaluable help in the characterization of samples. The authors also thank MINECO for its financial support (Project CTM2012-34449) |
| Databáze: | OpenAIRE |
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