Anodic Stripping Voltammetric Determination of Some Trace Elements in Portland Cement and the Electrostatic Precipitator Dust

Voltammetric methods have been successfully used for the simultaneous determination of minor and trace elements in cement industry. This is based on the analysis of water leach of the cement and the electrostatic precipitator dust samples using the mercury drop electrode in the anodic direction. This analytical procedure has both good selectivity and very high sensitivity. The ions detected and determined in Portland cement and electrostatic precipitator dust using these techniques are Pb(II), Zn(II), T1(I), and Sn(II). It is mainly observed that the concentrations of these ions under investigation differ greatly in Portland cement from the electrostatic precipitator dust. The main component in clinker structure is the impure tricalcium silicate (C3S, alite) which is responsible mainly for the strength of the cement after hardening. The impure dicalcium silicate (B-C2S, belite) is established with respect to other phases by foreign ions in solid solution.