COMPARATIVE CHARACTERISTIC OF THE ELECTROCHEMICAL METHODS EFFICIENCY FOR THE HEAVY METALS CONTENT STUDYING IN WASTE WATER

Abstract

Сompare  the  various  modern  electrochemical  research  methods  effectiveness  used  to determine the heavy metals concentration in waste water, based on the literature data. Methodology.  Analysis  of  literature  data  on  the  possibilities,  advantages  and  disadvantages  of
voltammetric, potentiometric, coulometric and conductometric methods for the heavy metals content studying in waste water.  Findings. The electrochemical methods are the most common methods for analyzing the composition of waste water. Among their advantages, it should be noted high selectivity, low concentration registration limit (up to 10
-10 M for stripping voltammetric methods), simplicity in execution, absence of preliminary long-term samples preparation for analysis, the ability to microvolumes measure without samples destroying and automation  of  the  process  for  continuous  metals  concentrations  determination  in  waste  water  treatment, relatively inexpensive equipment, the ability to determine the concentration of several metal ions in a mixture.
Originality. The studies have shown that most often the concentration of heavy metals in waste water determine with the using of the different modifications of voltammetric research methods (polarography and
varieties of stripping voltammetry) and potentiometric research methods in particular with highly sensitive and specific ion-selective indicator electrodes. Practical value. The theoretical material on modern electrochemical methods for the heavy metal ions content determining in waste water is generalized.