Exposure Assessment of Silver Nanomaterials in Workplaces

Abstract

PP-29-167 Background/Aims: Recently, numerous processes for the production of nanomaterials have been developed. With the increasing use of engineered nanomaterials, it is expected to increase the occupational exposures to nanomaterials in the workplace. The exposed nanomaterials may enter and accumulate in our body, potentially causing injury or death to humans. Especially, workers can be directly exposed to nanomaterials for a long time. Methods: However, the researches on the exposure assessment of nanomaterials to human and environment are just beginning step. Therefore, exposure assessment based on the real-time monitoring of exposed nanoparticle is one of the critical issues for EHS (environment, health, and safety). Results: In this study, exposure assessment of silver nanoparticles (AgNPs) in the workplaces was performed. AgNPs was generally synthesized by sol-gel chemistry (colloid AgNPs) or plasma explosion method (powder AgNPs). Sampling of exposed nanomaterials was conducted with SMPS (Scanning Mobility Particle Sizer) and auto-sampler, ESP (Electrostatic Precipitator). The collected samples were analyzed by TEM (Transmission Electron Microscope) for size, morphology, and agglomeration conditions. Conclusion: In the results, the nanoparticle concentrations in the air during the processing step were higher than those of normal conditions.