1 State Institution "Kundiiev Institute of Occupational Health of the National Academy of Medical Sciences of Ukraine", Kyiv
2 Kyiv International University
Introduction. It is known that nanoparticle emission in the air of working zone can be followed by both processes of nanomaterial production and processes that don’t relate to nanotechnologies directly, electric welding in particular.
The purpose of research – to assess nanosized fractions formed in welding with coated electrodes and reduced chromium (VI) content.
Materials and methods of research. In order to assess the emission of nanoparticles in the air of working zone in welding with high-alloy electrodes with rutile coating (two grades) and reduced chromium (VI) content the diffusion aerosol spectrometer DAS-2702, "AeroNanoTech’, Russia, was used. The chemical composition of air samples was determined by atomic-emission spectrometry method with inductively coupled plasma on the device Optima 2100 DV ("Perkin-Elmer", USA). Results. In the air of the working zone, in the first welding with the tested electrode 14–25 there have been detected chromium (VI), manganese, zinc, iron, cobalt, copper, and silicon. The second welding showed nanosized manganese, cobalt, silicon, magnesium, aluminum, cadmium, phosphorus. After welding with the experimental electrode 14–32 in the air of the working zone, nanosized zinc was detected. Manganese, silicon, magnesium, aluminum, cadmium were found in the working zone after repeated welding.
Conclusions. It is established that welding with the tested electrodes with improved sanitary and hygienic characteristics is accompanied by emission of particles in the range of 1–100 nm in the air of the working zone and it differs by the content of nanoscale metals in different time periods. The tested electrodes show a tendency to reduce the emission of nanoscale metals in the air of the working zone, in particular chromium and is corresponding to the decrease in the content of this element in their composition.
Key words: nanoscale fraction, welding aerosols, welding electrodes, working zone air, chromium (VI)
ORCID ID of co-authors and their contribution to the preparation and writing of the article:
Ryazanov AV (ORCID ID 0000-0002-4134-346X) - analysis of research results, conclusions;
Andrushishina I. M. (ORCID ID 0000-0001-5827-3384) - studying the chemical composition of air samples by atomic emission spectrometry with inductively coupled plasma (NPP-IRP) using the device "Ortima 2100 DV" ("Perkin-Elmer" , USA);
Demetskaya O.V. (ORCID ID 0000-0002-8174-7813) - estimation of the emission of nanoparticles into the air of the working zone during welding with high-alloyed brands of experimental electrodes with a rutile type of coating and different types of binding with a reduced content of chromium (VI) by diffusion aerosol spectrometer DAS 2702, "AeroNanoTech", Russia.