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ArticleName Separation of copper from electroplating waste
DOI 10.17580/tsm.2021.06.02
ArticleAuthor Nester A. A., Nikitin A. A., Gusev A. N., Pridoloba A. V.

Khmelnytskyi National University, Khmelnytskyi, Ukraine:

A. A. Nester, Associate Professor at the Department of Construction and Civil Security, Doctor of Technical Sciences, e-mail:
A. A. Nikitin, Associate Professor at the Department of Construction and Civil Security, Candidate of Technical Sciences
A. V. Pridoloba, Master’s Student at the Department of Foreign Language Practice and Teaching Methods

National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Kyiv, Ukraine:

A. N. Husiev, Associate Professor at the Department of Safety and Industrial and Civil Security, Candidate of Technical Sciences


Dumping and saving waste pickling solutions on the territory of enterprises leads to environmental pollution and requires significant costs at the plant and in wastewater treatment plants at the production sites when neutralizing them. The aim of the article is to present the results of research and tests in order to create environmentally friendly equipment. In this work, we studied the individual processes of regeneration of copperammonia pickling solutions with the production of dense copper deposits, the release of which drastically reduces the formation and storage of waste in the form of sludges in the territory of enterprises. It is pointed out that the chemical correction of etching solutions leads to the formation of a significant amount of wastewater, which contains heavy metals that adversely affect soils, groundwater, the plant world and humans, as the top of the food chain. The creation of equipment for the regeneration of used solutions with the release of metal in a form suitable for melting becomes an important element of environmental conservation and a cost-effective element of the process. The PCB etching line, created on the basis of research, allows for reusage in the technological process of wastewater after its recovery (regeneration) and use for the etching of the substrate of the printed circuit boards. For the regeneration of a copper-alkaline solution, a continuous installation using a cathode made of stainless steel or titanium with a thickness of 3 mm and a graphite anode with a thickness of 30 mm was proposed. The results of individual tests that indicate the possibility of using separated copper for metallization of substrates in the corresponding technological processes or after remelting for electrical purposesare presented. The use of a process with the precipitation of copper by dense precipitation makes it easier to remove metal by simple mechanical operations and to avoid a complex structure for the extraction of copper in the form of metal powders.

keywords Regeneration, sludge, etching solution, titanium, cathode, washing water

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