Meysam Sadeghi - Department of Chemistry, Lorestan University, Khorramabad, Iran
Pourya Zarshenas - Faculty of Chemistry & Petroleum Sciences, Shahid Beheshti University (SBU), Iran
Maryam Gholami - Department of Chemistry, Lorestan University, Khorramabad, Iran
Sina Yekta - Department of chemistry, Faculty of Basic Sciences, Islamic Azad University, Qaemshahr Branch, Qaemshahr, Iran

In the present study, the practicality of catalytic surfaces of nano-structured Co۳O۴ and MnCo۲O۴ for the adsorption and neutralization reactions of organo-phosphorous pollutants has been investigated. Co۳O۴ and MnCo۲O۴ nanoparticles have been successfully prepared by precipitation method using cadmium nitrate and manganese nitrate as the precursors and then characterized by scanning electron microscopy-energy dispersive micro-analysis (SEM-EDX) and X-ray diffraction (XRD) techniques. The application of the synthesized nanoparticles as solid catalysts for the adsorption and neutralization of (methoxy methyl phosphoryl) oxymethane (MMPOM) as an agricultural organo-phosphorous pesticide was assayed in different solvents and monitored by phosphorous-۳۱ nuclear magnetic resonance spectroscopy (۳۱PNMR), gas chromatography-mass spectroscopy (GC-MS) and IR analyses. The experimental results have shown that ۳۹%, ۴۷% and ۶۲% of MMPOM have been removed on the surface of Co۳O۴NPs in isopropanol, chloroform and decane solvents after ۱۲ h, respectively. While, higher amounts (۸۰%, ۹۲% and ۱۰۰%) were removed in the same solvents, when MnCo۲O۴NPs were chosen as the catalytic surface. This demonstrates that the choice of nanoparticle and solvent (MnCo۲O۴NPs and decane) have a great impact on the detoxification of MMPOM.

Co۳O۴ nanoparticles; MnCo۲O۴ nanoparticles; precipitation; (methoxy methyl phosphoryl) oxymethane (MMPOM); adsorption; neutralization