Physicochemical transformation of ZnO and TiO2 nanoparticles in sea water and its impact on bacterial toxicity
Journal Title: Environmental Health Engineering and Management Journal - Year 2019, Vol 6, Issue 1
Abstract
Background: The enormous properties of metal oxide nanoparticles make it possible to use these nanoparticles in a wide range of products. As their usage and application continue to expand, environmental health concerns have been raised. In order to understand the behavior and effect of metal oxide nanoparticles in the environment, comprehensive and comparable physicochemical and toxicological data on the environmental matrix are required. However, the behavior and effect of nanoparticles in the real environmental matrix, e.g. sea water, are still unknown. Methods: In this study, the effects of zinc oxide (ZnO) and titanium dioxide (TiO2) nanoparticles on the bacteria (gram positive-Bacillus subtilis, Staphylococcus aureus/gram-negative Escherichia coli, and Pseudomonas aeruginosa) in sea water were investigated. Furthermore, to better understand the behavior of the toxicity, surface chemistry, sedimentation, dissolution, particle size, and zeta potential of the nanoparticles dispersed in the sea water matrices were investigated using Fourier-transform infrared spectrometry (FTIR), ultraviolet–visible (UV-VIS) spectrophotometry, graphite furnace atomic absorption spectrometer (GFAAS), and dynamic light scattering (DLS), respectively. Results: The environmental matrix had a significant influence on physicochemical behavior of the tested nanoparticles. Besides, the inhibition of tested bacteria was observed against ZnO and TiO2 nanoparticles in the presence of sea water, while there was no inhibition in the controlled condition. Conclusion: The results demonstrate that surface chemistry with exposure to the sea water can have a significant role on the physicochemical properties of nanoparticles and their toxicity.
Authors and Affiliations
Asli Baysal , Hasan Saygin , Gul Sirin Ustabasi
Keywords
Related Articles
- EP ID EP45327
- DOI 10.15171/EHEM.2019.08
- Views 530
- Downloads 0
Photocatalytic removal of xylene as a pollutant in the air using ZnO-activated carbon, TiO2-activated carbon, and TiO2/ZnOactivated carbon nanocomposites
Background: Today, advances in different areas of science and technology along with their application in industries have led to an increase in dangerous pollutants which can resist biodegradation. Volatile organic comp...
MGMT methylation alterations in brain cancer following organochlorine pesticides exposure
Background: Alterations in the methylation levels of tumor suppressor genes are considered as one of the essential aspects of malignancies. The present study explored the association of O6-methylguanineDNA methyltransfer...
Factors associated with appropriate household water treatment method in Thailand
Background: Household water treatment is a vital public health measure, particularly in regions with limited access to clean drinking water. While several studies have explored water treatment practices globally, there...
Occupational exposure to metals among blacksmiths in Kano Metropolis, Nigeria
Background: Occupational workers especially those working in industries associated with metal and mining activities are excessively exposed to many toxic metals, which affect them. This study was conducted to determine...
A new treatment design for water contaminated with phenol
Background: Several important designs have been applied to remove toxic and hazardous organic substances like phenol and phenol compounds from wastewater, but there is a need to seek an alternative design to effectively...