On the possibility of using modern sedimentation reagents to extract heavy metal ions from wastewater from electroplating

Currently, any technological process is determined not only by production indicators, but also by environmental safety, which can be achieved with the use of new technologies, methods, modern reagents, etc. The article analyzes the aspects of the possible use of heavy metal ion precipitating reagents from Plexon: Plexon 3315, Plexon 2210 and Plexon 5020, as well as the organic precipitating reagent Plexon 9015 (a mixture of polyethyleneimine and dithiocarbamate). The use of these reagents makes it possible to implement a safe technology that meets all modern standards and requirements. Plexon reagents are capable of creating complexes with heavy metal ions in a short reaction time, which leads to a significant reduction in the amount of contaminated wastewater and a reduction in the volume of facilities. Laboratory studies were carried out on a developed semi-productive wastewater treatment plant containing metal ions using a universal professional dosing system Diversey. To understand the mechanism of complexation of heavy metal ions with the proposed reagents, diffractograms of reagent samples were obtained using the method of X-ray phase analysis. As a rule, the dosage of reagents depends on the type of metal being deposited, its concentration, and the complexing reagents used, which is confirmed in the obtained regression equations. During the experiment, there is a good comparability of the results of the experiments with the data from literary sources.