Investigation into heavy metals in storm wastewater from Vilnius Zirmunai district and pollutantits spread model in Neris river

Abstract

The paper discusses investigation into uncleaned storm wastewater pollution with heavy metals in Vilnius Zirmunai district. The goal is to determine the dependency of storm wastewater pollution with heavy metals on transport intensity. After determining this dependency, sweeps from street points is experimentally studied with the most intensive transport flows. As the street sweeps together with storm wastewater are both outflow from streets and through outflow pipes directly to the Neris, heavy metals in the outflow pipe sludge are also studied for each pool. The following heavy metals have been experimentally studied: Pb, Mn, Cr, Zn, Cu, Ni. The flame atomic absorption spectrometry method was used. The process of analysis is explained in short and its results are provided. A mathematical model by Phoenics 3.5 version program showing the distribution of heavy metals in the Neris river stream is made on the basis of the results received.

Nagrinėjama nevalomų lietaus nuotekų tarša sunkiaisiais metalais Vilniaus Žirmūnų rajone. Siekiant nustatyti ryšį tarp lietaus nuotekų užterštumo sunkiaisiais metalais nuo transporto eksperimentiškai tiriamos sąšlavos nuo gatvių, kuriuos su lietumi išplaunamos į upę. Taip pat tiriami sunkieji metalai iš lietaus ištekamųjų vamzdžių į Nerį. Eksperimentiškai nagrinėjami šie sunkieji metalai: Pb, Mn, Cr, Zn, Cu, Ni. Tam panaudotas liepsnos absorbcijos spektrometrinis metodas. Trumpai aptariamas analizės procesas ir pateikiami tyrimų rezultatai. Remiantis gautais rezultatais sudaromas matematinis teršalų sklaidos modelis Neries upės tėkmėje taikant Phoenics 3.5 programą.