title: Kinetics of adsorption of 2-chloroethylethylsulphide on Al2O3 nanoparticles with and without impregnants.
abstract: Alumina nanoparticles in the size range of 2-30 nm and surface area 375 m(2)/g were synthesized using aerogel route and then characterized using N(2)-BET, SEM, TEM, XRD, FTIR and TGA techniques. Thereafter, these were impregnated with reactive chemicals and tested for their potential by conducting studies on kinetics of adsorption of 2-chloroethylethylsulphide (2-CEES) under static conditions. Kinetics was studied using linear driving force and Fickian diffusion model. The kinetics parameters such as equilibration constant, equilibration capacity, diffusional exponent and adsorbate-adsorbent interaction constant were also determined. AP-Al(2)O(3) with 10% impregnation of MoVPA (V(3)) and NaOH showed the maximum (574 mg/g) and minimum (88 mg/g) uptake of 2-CEES among impregnated systems respectively. All impregnated systems except NaOH impregnation showed the values of diffusional exponent to be <0.5, indicated the diffusion mechanism to be Fickian, whereas AP-Al(2)O(3) with and without NaOH impregnation showed the diffusional mechanism to be anomalous. Hydrolysis and dehydrohalogenation reactions (identified using GC/MS technique) were found to be the route of degradation of 2-CEES.
authors.affiliation: P D Division, Defence R & D Establishment, Gwalior 474002, MP, India. amsa888@rediffmail.com
authors.forename: Amit
authors.initials: A
authors.lastname: Saxena
authors.forename: Avanish Kumar
authors.initials: AK
authors.lastname: Srivastava
authors.forename: Abha
authors.initials: A
authors.lastname: Sharma
authors.forename: Beer
authors.initials: B
authors.lastname: Singh
mesh_terms: D000327:Adsorption; D000537:Aluminum Oxide / Q000737:chemistry*; D002619:Chemical Warfare Agents / Q000302:isolation & purification; D003666:Decontamination / Q000379:methods*; D054879:Halogenation; D006868:Hydrolysis; D007700:Kinetics; D009151:Mustard Gas / Q000031:analogs & derivatives* / Q000302:isolation & purification; D053758:Nanoparticles / Q000737:chemistry*
chemical_list: D002619:Chemical Warfare Agents; C031278:2-chloroethyl ethyl sulfide; D000537:Aluminum Oxide; D009151:Mustard Gas