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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
Safe Degradation of the Pesticide Hexachlorcyclohexane by Molten Salt Oxidation
Author(s)
Paulo Ernesto de Oliveira Lainetti
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DOI:10.17265/2162-5298/2017.06.002
Affiliation(s)
Chemistry and Environmental CenterIPEN/CNEN-SP (Nuclear and Energetic Research Institute/Brazilian Nuclear Energy Commission), São Paulo 05508-000, Brazil
ABSTRACT
This study was motivated by the world interest in the development of
advanced processes of waste decomposition, due to the need of safer
decomposition processes, particularly for the POPs (Persistent Organic Pollutants) and the
organochlorines. A tendency observed at several countries is the adoption of
progressively more demanding legislation for the atmospheric emissions from the waste
decomposition processes. The suitable final disposal of hazardous organic
wastes such as PCBs (Polychlorinated Biphenyls),
pesticides, herbicides and hospital residues constitutes a serious problem. In
some point of their lifecycles, these wastes should be destroyed, in reason of
the risk that they represent for the human being, animals and plants. The
process involves a chemical reactor containing molten salts, such as sodium
carbonate or some alkaline carbonates mixtures to decompose the organic waste.
The decomposition is performed by submerged oxidation. Waste is injected below
the surface of a turbulent salt bath along with the oxidizing agent.
Decomposition of halogenated compounds, among which some pesticides, is
particularly effective in molten salts. The process presents properties such as
intrinsically safe control of organochlorine emissions. This work describes the
process developed at IPEN/CNEN-SP (Nuclear and Energetic Research
Institute/Brazilian Nuclear Energy Commission) for complete thermal decomposition of hazardous wastes through oxidation
submerged in molten salts.
KEYWORDS
Pesticides, organochlorine, decomposition, molten, salt, oxidation.
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