Removal of diisopropyl methyl phosphonate (DIMP) from heated metal oxide surfaces.

Autor: Vasudevan A; Department of Chemical and Materials Engineering, New Jersey Institute of Technology, University Heights, Newark, NJ 07102, USA., Senyurt EI; Department of Chemical and Materials Engineering, New Jersey Institute of Technology, University Heights, Newark, NJ 07102, USA., Schoenitz M; Department of Chemical and Materials Engineering, New Jersey Institute of Technology, University Heights, Newark, NJ 07102, USA., Dreizin EL; Department of Chemical and Materials Engineering, New Jersey Institute of Technology, University Heights, Newark, NJ 07102, USA. Electronic address: dreizin@njit.edu.
Jazyk: angličtina
Zdroj: Journal of hazardous materials [J Hazard Mater] 2023 Feb 05; Vol. 443 (Pt A), pp. 130154. Date of Electronic Publication: 2022 Oct 11.
DOI: 10.1016/j.jhazmat.2022.130154
Abstrakt: Diisopropyl methyl phosphonate (DIMP) is an organophosphorus compound used as a surrogate of sarin, a chemical weapon agent. Thermal decomposition of DIMP and similar liquids may be affected by added inorganic solids. Understanding such effects is needed to guide decontamination and environmental mitigation work. Here, liquid DIMP mixed with powders of γ-Al 2 O 3 or SiO 2 , was heated to 350 °C in a thermogravimetric analyzer while observing effluent gas using a mass spectrometer. For both powders, evaporation of DIMP occurred between 50 and 200 °C, followed by a second mass loss step up to 350 °C. The amount of DIMP evaporated in the first step varied; however, the size of the second, mass loss step was consistent between experiments for each solid used. For γ-alumina, 2-propanol and propene were released below the DIMP boiling point and mostly propene at higher temperatures. Calcining alumina prior to exposure to DIMP reduced the release of 2-propanol. For silica, the second mass loss step was smaller and only propene was released. Powders exposed to DIMP and recovered at different temperatures showed FTIR peaks corresponding to the individual bond vibrations of DIMP. At higher temperatures, only the P-CH 3 stretching vibration was observed.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2022 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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