Demetska O.V.1, Kozytska T.V.2, Andrusishina I.M.1, Movchan V.O.1, Tkachenko T.Yu.1, Grodzyuk G.Ya.3
1SI «Institute for Occupational Health of NAMS of Ukraine», Kyiv
2Bogomolets National Medical University, Kyiv
3L. V. Pisarzhevsky Institute of Physical Chemistry of NAS of Ukraine, Kyiv
Background. Researchers and workers, which are engaged in nanotechnologies, is a group, which is at most exposed to nanoparticles.
Objective. To assess risk level for workers, engaged in chemical synthesis of cadmium sulphide nanoparticles.
Materials and methods. A synthesis of the cadmium sulphide (CdS) nanoparticles was carried out in various conditions. The chemical analysis of samples was conducted by ICP-AES method on the Optima 2100 DV, Perkin-Elmer, USA. The concen¬tration of nanoparticles in the air of the workplace was measured using DAS-2707, Russia. The risk assessment was made using a “control banding” tool.
Results. The concentration of particles of 1—100 nm in the air fluctuated in the range of 22 000—42 000 particles/cm3. In the air samples nanoparticles of metals, which are usually used in the laboratory, were found: cadmium (Cd), lead (Pb), iron (Fe), copper (Cu), and silver (Ag). As a result of risk assessment the control band CB3 was received. CB3 corresponds to high risk level and requires risk reduction, including restriction of workers’ contacts with cadmium sulphide nanoparticles. Conclusions. It was determined that concentrations of cadmium nanoparticles before and after the synthesis were constant and did not exceed the calculated safe reference levels for nanomaterials. The presence of the background level of nanoparticle in premises, the composition of which depends on production processes, was proved. Also, it is confirmed, that low levels of quan¬titative concentrations of nanoparticles in the working zone air do not always correspond to risk levels for workers.
Key words: nanoparticles, cadmium sulphide, potential risk