Changing of Cations Concentrations in Waters of Polluted Urban River
Peter The Great Saint-Petersburg Polytechnic University, 195251, St.Petersburg, Russian Federation
a Corresponding author: firstname.lastname@example.org
Water from urban river Okhta polluted with domestic and industrial wastewaters was investigated. Specific electric conductivity (k), molar concentrations of ions Na+, K+, Mg++ and Ca++, concentration of total nitrogen (TN) were measured in water samples. Increasing of k happened together with increasing of molar fraction of sodium-ion (RNa) among all studied cations (and correspondingly decreasing of molar fractions of other cations). Good correlations were found between RNa and TN (r = 0.67), k and TN (r = 0.84). The results support the idea of the leading role of wastewaters in changing of k and cations concentrations. Electric conductivity and RNa could be used to distinguish between polluted and not polluted waters in the Okhta.
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