Kinetic Monte Carlo modeling was employed to investigate the kinetics and photodecomposition mechanism of sulfamethazine, ciprofloxacin, sulfathiazole, amoxicillin antibiotics by photo-Fenton process (iron(III) citrate/hydrogen peroxide in presence UV irradiation). The reaction kinetic mechanisms each degradation mentioned above have been achieved. rate constants values for step (including anti...

We report photocatalytic decolorization of direct red 81 (5-Solamine) in water at acidic pH and in presence of external UV light irradiation of zinc oxide (ZnO) nanparticle catalysts on granule glass as a semiconductor photocatalysts. In our study the weight of photocatalyst was constant. The photodecomposition rates have been found to be different by applying the different atmospheres through ...

We demonstrate the first colloidal synthesis of single-crystalline BiOCl ultrathin nanosheets (UTNSs) that feature a well-defined square morphology. Unlike BiOCl nanomaterials prepared by hydrothermal routes, our colloidal BiOCl UTNSs exhibit hydrophobic surface properties and high activity and selectivity toward the photocatalytic aerobic oxidation of secondary amines to corresponding imines a...

Gaseous monochlorobenzene was irradiated with KrF excimer laser (248 nm) under reduced pressure. The photodecomposition was an apparent first order reaction. When the system contained no additive gas, the photolysis was found to give benzene (conversion yield: 49%) in the gas phase and many unidentified products in the solid phase. On the other hand, in the presence of oxygen, carbon dioxide (1...

Abstract-The photodegradation of two phenylurea herbicides monuron 3-(4-chloropylphenyl)-1,1 dimethylurea) and isoproturon (3-(4isopropylphenyl)-1,1 dimethylurea) in an aqueous solutions containing nitrates (10 M) and nitrites (10 M), using irradiation at 310 nm and at 365 nm respectively is investigated. In both cases MN (10 M) and IP (10 M) photodegradation followed pseudo-first order kinetic...

The photodecomposition of ketones by the Norrish Type I reaction, leading to the efficient release of reducing ketyl or alpha-amino alkyl radicals, provides a facile route for the synthesis of copper nanoparticles (CuNP) in both aqueous and organic solvents. The role of different counterions (especially halides) and surfactants has been used to 'tune' the morphology and size of the nanostructur...

Use of chlorinated hydrocarbon pesticides for more than 30 years and polychlorinated biphenyls (PCB) for more than 40 years has resulted in the accumulation of these compounds in various ecosystems. Their accumulation in different ecosystems both near and well removed from their source of application is enhanced principally by their persistence and subsequent magnification between trophic level...

Research on the behavior and fate of pesticides in the environment has provided a number of valuable techniques for assessing the impact of any organic substance intentionally or unintentionally released in the environment. These techniques can be applied to the 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) to determine its behavior under comparable conditions. Important parameters affecting the e...