Physico-chemical and toxicological behaviour of al2o3 nanoparticles in fine particulate matter

Asli Baysal1, Hasan Saygin2

1 T.C. Istanbul Aydin University, Health Services Vocational School of Higher Education, Sefakoy Kucukcekmece, 34295 Istanbul, Turkey
2 T.C. Istanbul Aydin University, Application and Research Center for Advanced Studies, Sefakoy Kucukcekmece, 34295 Istanbul, Turkey

Abstract


The booming production and application of nanoparticles have raised great concern over its effect on environment, due to their increasing release in the environmental systems via intentional or unintentional activities, where their possible physicochemical and toxicological behavior remain unknown. The nanoparticles are released into the different environmental systems like air, soils and waters. However, their interaction with air matrices has been rarely investigated. For this reason, the changes of main physicochemical properties of Al2O3 nanoparticles in the presence of fine particulate matter were examined, as well as their toxicity towards gram-negative bacteria (Escherichia coli and Pseudomonas aeruginosa) and gram-positive bacteria (Bacillus subtilis and Staphylococcus aureus) using colony counting method was assessed in the presence of fine particulate matter. E. coli and B. subtilis were the most strongly affected species by the Al2O3 nanoparticles under the influence of fine particulate media. Furthermore, the main physicochemical properties (particle size, zeta potential, and surface chemistry) were changed with the exposure of the fine particulate matter. Sulfone groups were detached and nitro groups were attached on nanoparticles surface according to FTIR analysis. Particle size of Al2O3 was decreased with the correlation of zeta potentials. This is one of the rare study to evaluate the effect of fine particulate media on Al2O3 nanoparticles with the respect of the physicochemical properties and toxicity of Al2O3.

Keywords


Al2O3; bacterial inhibition; nanoparticle toxicity; PM2.5; physicochemical transformation

Full Text:

 Subscribers Only