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.

1. Skolubovich Yu.L., Voitov E.L., Tsyba A.A. Treatment and Disposal of Surface Wastewater. Moscow: ACB Publishing House, 2021. 108 p. (In Russ.). EDN: JUUYYB.

2. Popov V.G., Tyagunova V.G., Dinmukhametova L.S. Comparison of Chemical and Galvanochemical Techniques for the Industrial Complex Wastewater Treatment. Fundamental Research. 2017;1:101-105. (In Russ.). EDN: XVLQUN.

3. Kurilina T.A., Pazenko T.Ya., Matyushenko A.I., Zhuravlev A.S. On Effective Clearing Technology of Copper-Bearing Water with Non-Solvent-Reagent. International Research Journal. 2022;5-1:55-61. (In Russ.). https://doi.org/10.23670/IRJ.2022.119.5.051. EDN: SNGMLU.

4. Lobanova A.А. Reagent Water Treatment in the System of Recycling Water Supply. Environmental Engineering. 2011;1:87-88. (In Russ.). EDN: NUDBWP.

5. Movchan S.I. The Use of Reagents in The Technology of Galvanic Production’s Wastewater Treatment. The Builder of Donbass. 2024;1:22-29. (In Russ.). EDN: AGXTCN.

6. Pavlov D.V., Varaksin S.O. Development and Implementation of Modern Technologies for Wastewater Treatment in Galvanic Production. Voda: tekhnologiya i ekologiya. 2010;2:16-26. (In Russ.).

7. Khalturina T.I., Churbakova O.V., Kurilina T.A. Conditioning of Wastewater Sludge from Metalworking Plants. News of Higher Educational Institutions. Construction. 2010;9:69-74. (In Russ.). EDN: OZICOB.

8. Joshi M.D., Anderson J.L. Recent Advances of Ionic Liquids in Separation Science and Mass Spectrometry. Royal Society of Chemistry. 2012;2:5470-5484. https://doi.org/10.1039/C2RA20142A.

9. Weissberger A., Proskauer E.S., Riddick J.A., Toops E.E. Organic Solvents: Physical Properties and Methods of Purification. Wiley:New York, 1955. 212 p.

10. Ternova D., Boltoeva M., Cointeaux L., Gaillard C., Kalchenko V., Mazan V. et al. Dramatic Changes in the Solubilities of Ions Induced by Ligand Addition in Biphasic System D2O/DNO3//[C1C4im][Tf2N]: A Phenomenological Study. The Journal of Physical Chemistry B. 2016;120(30):7502-7510. https://doi.org/10.1021/acs.jpcb.6b05424.

11. M.A. Tursunov, B.B. Umarov, Synthesis and crystal structure of nickel (II) complex based on benzoylhydrazone of 4-phenyl-2,4-dioxobutanoic acid methyl ester // UNIVERSUM Chemistry and Biology. 2018. No. 12 (54). P. 50-52.

12. Chebotarev V.K. Prediction in Titrimetric Analysis Methods Using Complexation and Precipitation Reactions: Monograph. Barnaul: Publishing House of the Altai State University, 1999. 114 p. (In Russ).

13. Smirnova N.N., Smirnov M.E. Cellulose Sorbent Modification as the Regulation Instrument of Its Kinetic Characteristics and Sorption Capacity With Regard To Copper (Ii) Ions. Sorption and Chromatography Processes. 2018;18(1):26-34. (In Russ.). EDN: YRTIBJ.

14. Fenglian Fu, Liping Xie, Bing Tang, Qi Wang, Shuxian Jiang Application of a Novel Strategy—Advanced Fenton-Chemical Precipitation to the Treatment of Strong Stability Chelated Heavy Metal Containing Wastewater. Chemical Engineering Journal. 2012;189-190:283-287. https://doi.org/10.1016/j.cej.2012.02.073.

15. Dashevskii V.G., Baranov A.P., Kabachnik M.I. Spatial Aspects of the Formation of Metal Chelate Complexes. Russian Chemical Reviews. 1983;52(2):268-293. (In Russ.). https://doi.org/10.1070/RC1983v052n02ABEH002804.