Physicochemical properties (pH, Electrical conductivity, Total dissolved salt, Cl -, F -, NO3 -, SO4 -2 , NH4 + and Chemical oxygen demand) of Sixteen brands bottled water in Kurdistan region-Iraq were analyzed using standard methods. The physicochemical properties of the bottled water measured in this work compared with manufacturer's labeling reported on the bottles and were compared with the guideline value of World Health Organization (WHO) and International Bottled Water Association (IBWA) standards. The change of physicochemical properties investigated when the bottled water exposed to sunlight or storage at different temperature for 30 days. IR-spectroscopy was carried out in order to deduce the nature of polymer material and its purity. Results indicated that the quality of bottled water samples was within the permissible limit, while it is changed with the time of sunlight exposed or temperature changes. The results indicate, the physicochemical properties of all bottled water samples are within the international guidelines of bottled water and not the same that reported on the bottle label. The results show each of sun light exposure and temperature of storing cause changes in all physicochemical properties of water in the plastic bottle. @JASEM

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Adsorption characteristics and catalytic photodegradation of carbendazim (methyl benzimidazol-2-ylcarbamate) have been investigated in Kurdistan natural soil and different natural waters (drinking, river, lake and ground water). Physico-chemical properties of the natural soil and water were determined. The equilibrium adsorption of carbendazim onto studied soil samples described by Freundlich adsorption model. The catalytic photodegradation processes were studied in aqueous Titanium dioxide (TiO 2 ) suspensions under UV radiation. The kinetic study was done by monitoring the concentration during the degradation process, using High performance Liquid Chromatography (HPLC), coupled with UV-visible spectrophotometer. It was found that the photocatalytic degradation process in this work exhibited pseudo first-order kinetics. The rates of catalytic photodegradation of carbendazim in natural water were lower than that in distilled water.

The first photolysis of synthesized Schiff base [Bis-(2-chlorobenzalidene) benzidine] in the presence of various solvents (methanol, acetonitrile and n-hexane) was carried out under UV-light radiation. The data obtained by UV-Visible spectroscopy was used to determine the kinetic parameters of the Schiff base photolysis. It was found that the degradation of Schiff base in all solvents followed a first order reaction. The results show the rate of photolysis depends on the polarity of solvents. The effect of temperature on the photolysis process in methanol has been studies at different temperature ranging from 10ºC to 50ºC. The activation energy has been determined. The intermediates formed in the Schiff base photolysis processes were detected and identified, using High Performance Liquid Chromatography analytical technique coupled with UV-visible spectrophotometer.