Removal of nerve agent sarin simulant from aqueous solution using the ZSM-5/CoFe2O4 NPs adsorbent

The zeolite ZSM-5 (MFI-5) was synthesized by the hydrothermal method. The cobalt ferrite spinel nanoparticles (29.4 wt% of CoFe 2 O 4 NPs) were immobilized over it via the ultrasound assisted dispersion route to acquire the novel zeolite ZSM-5/CoFe 2 O 4 NPs adsorbent. The synthesized samples were c...

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Bibliographic Details
Published in:Journal of the Iranian Chemical Society 2019-02, Vol.16 (2), p.269-282
Main Authors: Yekta, Sina, Sadeghi, Meysam, Mirzaei, Daryoush, Zabardasti, Abedin, Farhadi, Saeid
Format: Article
Language:English
Subjects:
Adsorbents
Analytical Chemistry
Aqueous solutions
Biochemistry
Biological & chemical weapons
Chemistry
Chemistry and Materials Science
Cobalt ferrites
Degradation
Inorganic Chemistry
Mapping
Nanoparticles
Organic Chemistry
Original Paper
Phosphoric acid
Physical Chemistry
Sarin
Synthesis
Zeolites
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Summary:The zeolite ZSM-5 (MFI-5) was synthesized by the hydrothermal method. The cobalt ferrite spinel nanoparticles (29.4 wt% of CoFe 2 O 4 NPs) were immobilized over it via the ultrasound assisted dispersion route to acquire the novel zeolite ZSM-5/CoFe 2 O 4 NPs adsorbent. The synthesized samples were characterized by XRD, FTIR, VSM, AFM, FESEM, TEM, EDAX, and X-ray dot-mapping. The ZSM-5/CoFe 2 O 4 has been proposed for the effective removal of DMMP (dimethyl methyl phosphonate) a simulant of nerve agent sarin from aqueous solution. The analysis results from both GC-FID and GC–MS clearly proved the substantial adsorption–degradation phenomenon. Further, the effect of several factors including contact time, initial concentration, adsorbent dose, and adsorbent type on the removal of DMMP were surveyed. The GC-FID analysis data confirmed the maximum removal of 94.3% for DMMP. The parameters namely: contact time (50 min), adsorbent dose (0.1 g), and initial concentration (50 mg/L) were considered as optimized values for the reaction. Moreover, the reaction kinetic was studied applying first order model. The half-life ( t 1/2 ) and rate constant ( k ) were calculated as 13.27 min and 0.0522 min −1 , respectively. Ultimately, the less toxic methyl phosphoric acid as the degradation and hydrolysis product of the DMMP by the ZSM-5/CoFe 2 O 4 NPs was emerged and identified.
ISSN:1735-207X
1735-2428
DOI:10.1007/s13738-018-1504-y