Spent sulfuric acid plant catalyst: valuable resource of vanadium or risky residue? Process comparison for environmental implications
| Autor: | Agnieszka Gruszecka-Kosowska, Anna Tomczyk, Anna Potysz, Ewa Kmiecik, Bartosz Mikoda |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Health
Toxicology and Mutagenesis Vanadium chemistry.chemical_element 02 engineering and technology 010501 environmental sciences 01 natural sciences Biohydrometallurgy Catalysis chemistry.chemical_compound Acidithiobacillus thiooxidans Bioleaching Sustainable development Environmental Chemistry Recent Developments and Innovative Strategies in Environmental Sciences in Europe Waste management 0105 earth and related environmental sciences biology Sulfuric acid General Medicine Secondary resources Sulfuric Acids 021001 nanoscience & nanotechnology biology.organism_classification Pulp and paper industry Silicon Dioxide Pollution Environmental risk Flue-gas desulfurization chemistry Leaching (metallurgy) 0210 nano-technology Citric acid Metal recovery |
| Zdroj: | Environmental Science and Pollution Research International |
| ISSN: | 1614-7499 0944-1344 |
| Popis: | The enormous amount of spent catalysts generated worldwide may pose a risk to the environment because of their high load of metals, including vanadium. The latter may be mobilized and released to the environment if managed improperly. Moreover, the catalysts could be considered as secondary resources rather than waste. This study aimed at the efficient extraction of vanadium from spent desulfurization catalyst (SDC) from a sulfuric acid production plant. The raw SDC and the post-extraction residues were characterized in terms of their chemical and phase composition. The metal mobility from the materials was examined with both single-step and multi-step extractions. The environmental risk assessment was performed using sequential extraction. The study revealed that both tested methods (citric acid leaching and bioleaching with Acidithiobacillus thiooxidans) enable the extraction of nearly 96% of V from SDC with a simultaneous reduction of metal mobility. However, the bacterial treatment was found more suitable. The leached residue was mostly (> 90%) composed of SiO2, which makes it a potential candidate for application in construction (e.g., concrete mixtures) after additional examinations. The study highlights the need to develop a metal extraction process for SDC in a way that metal-free residue could be a final product. |
| Databáze: | OpenAIRE |
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