title: Adsorption of organophosphates into microporous and mesoporous NaX zeolites and subsequent chemistry.
abstract: Due to the neurotoxicity of organophosphate (OP) pesticides and nerve agents synthesized as military or terror agents, their safe destruction and disposal is of considerable current importance. A representative OP, trimethyl phosphate (TMP), was adsorbed onto NaX zeolite, two mesoporous modifications, and a low-silica X zeolite. The nucleophilic chemical reactions of TMP with the zeolites were investigated by solid-state 13C and 31P nuclear magnetic resonance (NMR) and the solvent extracts by 1H, 13C, and 31P NMR. Nucleophilic substitution and subsequent hydrolysis reaction schemes are proposed. All of the zeolites have similar TMP decomposition yields, supporting the hypothesis that slow or incomplete diffusion of TMP in the microporous zeolite regions limits TMP decomposition.
authors.affiliation: Department of Chemistry, Binghamton University, State University of New York, Vestal Parkway East, Binghamton, New York 13902-6000, United States. qmeng@binghamton.edu
authors.forename: Qingguo
authors.initials: Q
authors.lastname: Meng
authors.forename: David C
authors.initials: DC
authors.lastname: Doetschman
authors.forename: Apostolos K
authors.initials: AK
authors.lastname: Rizos
authors.forename: Min-Hong
authors.initials: MH
authors.lastname: Lee
authors.forename: Jürgen T
authors.initials: JT
authors.lastname: Schulte
authors.forename: Apostolos
authors.initials: A
authors.lastname: Spyros
authors.forename: Charles W
authors.initials: CW
authors.lastname: Kanyi
mesh_terms: D000327:Adsorption; D052918:Environmental Restoration and Remediation / Q000379:methods*; D009682:Magnetic Resonance Spectroscopy; D010755:Organophosphates / Q000737:chemistry*; D016062:Porosity; D014867:Water / Q000737:chemistry; D017641:Zeolites / Q000737:chemistry*
chemical_list: D010755:Organophosphates; D014867:Water; D017641:Zeolites; C003715:trimethyl phosphate