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- Title
Recycling of hydrodehalogenation catalyst used for detoxification of halogenated aromatic contaminants based on circular economy principles.
- Authors
WEIDLICH, Tomas; HEGEDÜS, Michal; KAMENICKA, Barbora
- Abstract
The presentation deals with the application and facile recycling of commercially available Al-Ni alloy highly effective for the destruction of halogenated recalcitrant aromatic compounds from contaminated aqueous streams. The described destruction of non-biodegradable halogenated aromatic contaminants is based on reductive dehalogenation accompanied by formation of completely dehalogenated biodegradable products even at room temperature and ambient pressure. Mentioned Al-Ni alloy is converted to Raney nickel and soluble aluminate salts during dehalogenation process. Inactivated Raney nickel is efficiently recycled using mechanical activation by milling with Al powder with subsequent thermal processing. The Al-Ni based hydrodehalogenation reaction was applied to the samples of real wastewater showing high efficiency for chlorinated benzenes removal. The recyclable Raney Al-Ni alloy provides an alternative to less efficient bimetallic couples or costly precious metal-based hydrodehalogenation catalysts.
- Subjects
BIODEGRADABLE products; MECHANICAL alloying; CIRCULAR economy; POLLUTANTS; AROMATIC compounds; CATALYSTS recycling
- Publication
Waste Forum, 2024, Issue 2, p144
- ISSN
1212-7779
- Publication type
Article