The photodegradation of bisphenol A (BPA) in pure water, surface water and wastewater effluents was studied. The effect of different hydrogen peroxide concentrations on degradation was investigated. The rate of BPA photolysis in the presence of hydrogen peroxide was lower in waste water effluent than in purified water. Phenol, 1,4-dihydroxylbenzene and 1,4-benzoquinone were identified by means of HPLC as intermediate products of the photodegradation

With the water framework directive the EC-Commission is requested to define environmental quality standards for priority substances to protect aquatic biota in surface waters. Quality standards have to be derived by a scientific risk assessment and should not be exceeded according to article 16 of the water framework directive. In this work funded by the German Länder Working Party on Water (Länderarbeitsgemeinschaft Wasser - LAWA) data sheets

The photolysis of nonylphenol (NP) was investigated using a solar simulator in the absence/presence of dissolved organic matter (DOM), carbonate, nitrate and Fe(III) ions. The effects of different parameters such as initial pH, initial concentration of substrate, temperature, and the effect of hydrogen peroxide concentration on photodegradation of nonylphenol in aqueous solution have been assessed. The results indicate that the oxidation rate increases

This paper evaluates the catalytic effectiveness of three iron exchanged ultra-stable Y zeolites (USY) for the degradation of a reactive azo dye, C.I. Reactive Yellow 84 (RY84) using hydrogen peroxide, as an oxidant, under very mild conditions (atmospheric pressure and t = 50C). The catalysts were prepared by ion exchange, starting from a commercially available ultra-stable Y zeolite. All experiments were performed on a laboratory scale set-up. Important

This paper evaluates the degradation of a reactive azo dye, Procion Marine H-EXL, by catalytic wet hydrogen peroxide oxidation (CWHPO). The catalyst was prepared by ion-exchange, starting from a commercially available ultrastable Y zeolite. All experiments were performed on a laboratory scale set-up. The effects of different reaction parameters such as initial pH, catalyst and hydrogen peroxide concentrations on the oxidation of the dye aqueous solution

This paper evaluates the degradation of two azo reactive dyes, C.I. Reactive Yellow 84 (RY84) and C.I. Reactive Red 120 (RR120) by photo-Fenton and Fenton-like oxidation. All experiments were performed on a laboratory scale set-up. The effects of different reaction parameters such as initial pH, contact time, effect of light and hydrogen peroxide concentrations on the oxidation of the dye aqueous solutions have been assessed. Effective system conditions

This paper evaluates the degradation of two reactive azo dyes, C. I. Reactive Yellow 84 (RY84) and C. I. Reactive Red 120 (RR120) by photo-Fenton oxidation. All experiments were performed on a laboratory scale set-up. The effects of different reaction parameters such as initial pH, contact time, effect of light and hydrogen peroxide concentrations on the oxidation of the dye aqueous solutions have been assessed. Effective system conditions were found

The degradation of the Disperse Red 354 azo dye in water was investigated in laboratory- scale experiments, using four advanced oxidation processes (AOPs): ozonation, Fenton, UV/ H2O2, and photo-Fenton. The photodegradation experiments were carried out in a stirred batch photoreactor equipped with an immersed low-pressure mercury lamp as UV source. Besides the conventional parameters acute toxicity test with LUMIStox 300 instrument was conducted

This paper evaluates the degradation of a reactive azo dye, Reactive Yellow 84, on three iron exchanged ultrastable Y zeolites by catalytic wet hydrogen peroxide oxidation (CWHPO). The catalysts were prepared by ion-exchange, starting from a commercially available ultrastable Y zeolite. All experiments were performed on a laboratory scale set-up. The results show that it is possible to remove 96.90% of color, 70.70% of COD and 34.52% of TOC using

Two photochemical processes (H2O2/UV and photo- Fenton) have been experimentally investigated, in comparison with ozonation, for the degradation of the Disperse Red 354 azo dye in water. The effectiveness has been evaluated through three conversions: decolorization degree (X1), COD reduction (X2), and TOC reduction (X3). The decolorization degree at a given time in the three processes decreased in the order : photo- Fenton > ozonation > UV / H2O2.