PRELIMINARY ANALYSIS AND EVALUATION OF THE CONCENTRATION OF Pb(II), Zn(II), Cu(II) IN THE WASTEWATER FROM SOME FLOTATION MINERAL FACTORIES IN CHO DON DISTRICT, BAC KAN PROVINCE

Abstract

     This paper focus on the concentration of Pb(II), Zn(II), Cu(II) in the wastewater from some flotation mineral factories in Cho Don district, Bac Kan province. The results showed that the concentration of Pb(II) in the majority of the samples exceeded the allowed limits while the concentration of Zn(II) and Cu(II) are within the limits permitted by National Technical Regulation on Industrial Wastewater. The concentration of each metal ion in the samples was determined as 0.071 ÷ 0.663ppm for Pb(II); 0.454 ÷ 1.619ppm for Zn(II); 0.308 ÷ 0,932ppm for Cu(II), respectively. The concentration of the ions in the samples taken on the dry season are higher than the rainy season.