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Within an area heavily concerned by mining activities, chemical analyses have been performed in order to estimate the quality of the surface water and of the groundwater, by assessing also the concentrations of Ba, Mn, Fe, Cu, Zn, Ni, Cr, Cd, Al, Pb, Sb, As adsorbed on the surface of the suspended particulate matter (SPM). The investigations have addressed a 108 km long section of Arieş stream. The analyzed nutrients, namely NH4, NO2 and NO3, are liable to accumulate within the phreaticdoaj:fbce44dca385456c8c5e1dc5a32b470c fatcat:ghds3r6vifftbpvbthf243ymzu