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N. Zamani,H.R. Rajabi,M. Taghdiri,A. Sohyl Fakhaei,V. Vatanpour 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.1
This work reports adsorption and catalytic oxidation process for degradation of hexamine (HMT)-containing industrial wastewater based on the reduction in total organic carbon. The studied systemsinclude hydrogen peroxide, MCM-41, phosphotungstic acid (PTA)/MCM-41 embedded via impregnationmethod, PTA/H2O2 and PTA/MCM-41 embedded via impregnation or direct synthesis methods in thepresence of hydrogen peroxide. The TOC results indicated that the system including PTA embeddedwithin MCM-41 via direct synthetic method in the presence of H2O2 has a higher performance fordegradation of HMT-containing wastewater. The total organic carbon for the mineralization of HMT wasobtained to be 57%, under optimum conditions.
S. Zinadini,A.A.L. Zinatizadeh,M. Rahimi,V. Vatanpour 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.46 No.-
Nanocomposite polyethersulfone (PES) nanofiltrationmembranes were prepared using self-synthesizedmagnetic ZnFe2O4/SiO2 nanofiller by the phase inversion method. The main aim of this paper was toinvestigate effect of magnetic field in coagulation step on characteristics of the prepared membranes. The performance of the fabricated mixed matrixmembranes was studied by measuring pure water flux,salt retention and fouling parameters. As a result, coagulation bath under magnetic field significantlyenhanced pure water flux of the membranes from about 12 kg/m2 h (without magnetic field) to 38 kg/m2 h in the presence of 1 wt.% ZnFe2O4/SiO2 nanoparticles. This described by amount of magneticnanofillers on the membrane morphology coagulated under the magnetic field of 0.1 T, which changedthe skin-layer structure. EDX mapping showed that the magnetic nanoparticles migrated to themembrane surface, when the membrane coagulated under magnetic field. The water contact anglemeasurement showed the excellent hydrophilicity of 0.5 wt.% ZnFe2O4/SiO2 embedded membranesunder magnetic field, which resulted in the superior antifouling properties against powdermilk solution. The salt retention sequence for 0.5 wt.% nanoparticle under magnetic field was in sequence of R(Na2SO4) > R (MgSO4) > R (NaCl).