Heavy metals in the water of the river Zletovska and the vicinity

Abstract

The paper presents the results and conclusions from the investigations carried out on the water contamination with heavy metals in the River Zletovska and its vicinity. The examinations are an attempt to determine the real and the physical state of heavy metals in the river water and its tributaries. Seventeen samples were collected from the Zletovska and several smaller rivers in the surrounding. Samples were analyzes with AES - ICP method. Earlier experiences indicated that the following elements should be expected: Mn, Fe, Zn, As, Cd, Cu, Ni, Co, Ag, Ti with possible occuarrence of increased concentrations of maximum allowable amounts. Analysis and data interperation yielded increased concentrations of Mn, Fe, Al, Pb, Zn, As, Cd and Cu. The entire drainage system in the Zletovska in the Municipality of Probistip has been polluted. The drainage system in the area consist of the Rivers Kiselica and Koritnica, Casticki Dol and Lojzanski Dol. It was found that the major pollutants are the Zletovo, Mine and the discharge of waste waters containing heavy metals. The increased concentrations of some metals are often higher than maximum allowable.