Determination of the complexing properties of natural organic impurities in drinking waters with respect to copper (II) ions
Introduction of the index total organic carbon to the List of centralized water supply standardized for drinking water is hindered by an ambiguous correlation with the properties of organic impurities in drinking water. In the work, it was proposed to use the index characterizing complex-forming properties of organic impurities in water with respect to copper (II) cations to substantiate the normative values. It has been established that in organic drinking bottled waters the concentration of organic impurities is from 0.76 to 6.48 mg / L by TOC, and their activity with respect to copper (II) ions is very different: the complexation coefficient varies from 0.28 to 1.55. High complexing activity of potable water of centralized water supply can be significantly reduced with a slight decrease in TOC content. It is advisable to take into account the change in the content of TOC and the complexing properties of organic impurities with respect to biometals when improving domestic water treatment technologies, as well as post-treatment of drinking water from organic impurities.