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Abstract:In the present investigation, synthesis of Cd, Sr doped ZnO semiconducting material was carried out by ecofriendly simple mechanochemical method. The grinding of Oxalic acid, Zinc acetate, Cadmium acetate and Strontium acetate in mortar and pestle at non-stoichiometric proportion allowed these reactant to react and to form Cd, Sr doped ZnO Photocatalyst, after thermal treatment to intermediate metal oxalate. SEM reveals the rod shape of material and EDX confirmed the incorporation of Cd and Sr in the crystal lattice of ZnO. The reduction of photocatalytic activity of Cd, Sr doped ZnO semiconducting microsize material was observed for Rhodamine 6G dye in UV light with pure ZnO.

Volatile organic compounds (VOCs) analysis was carried out for the surface water of the Savitri river during the period of June 2005 to June 2007. BTEX compounds (Benzene, Toluene, Xylene & Ethyl benzene) were analyzed by using micro extraction technique (Purge & Trap). Concentrations of these BTEX compounds were ranging from 0.1 to 1.5 ppm during sampling period. Higher concentrations of BTEX were found at sampling location VI. Concentration of ethyl benzene was very low as compare to other compounds. However, the concentration of benzene was very high. Seasonal variations in conc. of BTEX compounds were observed and higher concentration was detected during the summer season. Salting-out effect had given higher quantification values. In PCA and PFA, the component loading for all the variables are positively correlated. Death of fishes was observed in the river that is indication of severe pollution problem.