Photochemical mineralization of amoxicillin medicinal product by means of UV, hydrogen peroxide, titanium dioxide and iron.

In the present study, the photochemical degradation of amoxicillin and total organic carbon (TOC) removal in pharmaceutical aqueous solutions was studied using UV irradiation, titanium dioxide, hydrogen peroxide and iron in a batch photoreactor operated for 120-150 min. The effect of the initial concentrations of the target compound, hydrogen peroxide and ferric ions and of their combination was examined. It was found that under direct UV photolysis, considerable TOC removals were obtained only when the initial concentration of amoxicillin (AM) was below 100 mg/L.

Catalytic destruction of gaseous ethanol and product formation over CuO/CeO2/Al2O3 catalysts.

In the present work, the catalytic decomposition or oxidation of ethanol over CuO/CeO(2)/γ-alumina catalysts is presented. Ethanol was oxidized in a tubular flow reactor under both oxygen excess and deficit conditions. Various amounts of ceria (0-14 % w/w) were added by wet impregnation to catalysts containing 1 % and 10 % w/w CuO on γ-Al(2)O(3).

Photocatalytic degradation of methyl tert-butyl ether in the gas-phase: a kinetic study.

Methyl tert-butyl ether (MTBE) is the basic oxygenated motor fuel additive in Europe and is included in volatile organic compounds (VOCs), which can produce photochemical oxidants. In the present study the gas-phase photocatalytic oxidation (PCO) of MTBE over illuminated titanium dioxide was carried out at ambient temperature in a plug flow reactor. The intermediates detected are mainly tert-butyl formate and acetone, while the final products are CO(2) and water.

Photochemical treatment of 2-chlorophenol aqueous solutions using ultraviolet radiation, hydrogen peroxide and photo-Fenton reaction.

In the present work, the photochemical oxidation of 2-chlorophenol aqueous solutions in a batch recycle photochemical reactor using ultraviolet irradiation and hydrogen peroxide was studied. Specifically, the effect of hydrogen peroxide initial concentration (0-10316 mg L(-1)) and 2-chlorophenol initial concentration (150-3000 mg L(-1)) was examined. The process was attended via total organic carbon (TOC), 2-chlorophenol, chloride ion, acetic acid, formic acid and pH measurements.

Photochemical degradation of 1,3-dichloro-2-propanol aqueous solutions.

The photochemical oxidation of 1,3-dichloro-2-propanol (1,3-DCP) was studied by following the target compound degradation, the total carbon removal rate by a total organic carbon (TOC) analyzer and by identifying the oxidation products by gas chromatography-mass spectrometry (GC-MS). The reaction was performed in a batch recycle reactor, at room temperature, using UV radiation provided by a low pressure 12W Hg lamp and H(2)O(2) as oxidant. Chloride ions, formic, acetic and chloroacetic acid were measured by ion chromatography.