Treatment of contaminated water in the zinc unit in the Trepça complex

Abstract

One of the biggest sources of pollution land and water are industrial waste waters. At section of zinc industry in complex Trepca during the process of zinc production are gained wastewater where their negative impact is wider extent of contamination of land with which it comes in contact and in this case comes to the accumulation ions of heavy metals, surface- water and then mixing with groundwater and pollution. Directly with vulnerable is Sitnica river, in which contaminated water flows from the industrial unit for the production of Zn, which flows into the Iber river, which still flows into the Morava river in Serbia, thus presents a problem internationally. The objective of the paper is concerned with the characteristics of industrial wastewater from the section of zinc in Trepca complex and their impact on water pollution around. Are made quantitative and qualitative analyses of samples of polluted water before and after the production process and is found high content of ions of heavy metals such as: Pb, Zn, Cu, Fe, Cd, Bi, Ni, Co, Sb, Sn, etc., and which exceed the values of MLD, provided by international legislative rules. Neutralization is made of industrial wastewater based on the pH value and concluded that the water is rich belongs to the category of IV water according to legal regulations for water.