This paper emphasizes a groundwater quality assessment using thirty-seven hydro-geological drillings, located in vulnerable and non-vulnerable areas in Botosani County as regarding nitrate and nitrites based pollutants and also phosphates and ammonium, during 2001-2008. The groundwater quality from vulnerable areas is within allowed limits. It was observed a decrease of nitrates and nitrites concentration in four locations designated as vulnerable zones regarding nitrates. In non-vulnerable areas, the groundwater quality deteriorated between 2006-2008, in terms of ammonium, nitrites and nitrates content. In some hydrogeological drillings, like Sadoveni and Stefanesti, the nitrites concentration (1.54 mg/L, 1.37 mg/L respectively) exceeded the legal accepted limit. The ammonium concentration in non-vulnerable areas also exceeded the limit of 0.5 mg/L. By token of the results of this monitoring activity the risk of groundwater pollution with nitrates was reassessed. MMDD Order 1552/743/2008 approved a new list of localities where sources of nitrates exist from agricultural activities; in Botosani County seventy-seven new localities were designated as vulnerable areas regarding nitrates pollutants.

Crystallized titania layers were prepared by vacuum sputtering in a DC magnetron. Photocatalytic properties of the crystals were analyzed using degradation of formaldehyde in a self-conception reactor. All data were analyzed using classical curve dependence and statistical. This study used Anova to find correlations between photocatalytic properties of the crystals and deposition parameters. The considered parameters were pressure, temperature of substrate, argon concentration and time of sputtering, all of this measured during the active process.