Amine promoted, metal enhanced degradation of Mirex under high temperature conditions

• Published in: Journal of hazardous materials 2006-07, Vol.135 (1), p.437-442
• Main Authors: Jallad, Karim N., Lynn, Bert C., Alley, Earl G.
• Format: Article
• Language: English
• Subjects: Amines - chemistry; Applied sciences; Chemical engineering; Degradation; Dehalogenation; Exact sciences and technology; Gas Chromatography-Mass Spectrometry; Halogens - chemistry; Metals - chemistry; Mirex; Mirex - chemistry; Mirex derivatives; Molecular Structure; Pollution; Reactors; Temperature
• ISSN: 0304-3894; 1873-3336
• DOI: 10.1016/j.jhazmat.2005.10.062

In this study, zero-valent metal dehalogenation of mirex was conducted with amine solvents at high temperatures. Mirex was treated with excess amine in sealed glass tube reactors under nitrogen. The amines used were n-butyl amine (l), ethyl amine (l), dimethyl amine (g), diethyl amine (l), triethyl amine (l), trimethyl amine (g) and ammonia (g). The metals used were copper, zinc, magnesium, aluminum and calcium. The most suitable amine solvent and metal were selected by running a series of reactions with different amines and different zero-valent metals, in order to optimize the conditions under which complete degradation of mirex takes place. These dehalogenation reactions illustrated the role of zero-valent metals as reductants, whereas the amine solvents acted as proton donors. In this study, we report that mirex was completely degraded with diethyl amine (l) in the presence of copper at 100 °C and the hydrogenated products accounted for more than 94 of the degraded mirex.