4.1 Review

Evaluation of TiO2 Nanoparticles Physicochemical Parameters Associated with their Antimicrobial Applications

Journal

INDIAN JOURNAL OF MICROBIOLOGY
Volume 62, Issue 3, Pages 338-350

Publisher

SPRINGER
DOI: 10.1007/s12088-022-01018-9

Keywords

Bacteria; Environment; Physicochemical parameters; TiO2 Nanoparticles; Toxicity

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This review evaluates the impact of different physicochemical parameters and experimental conditions of titanium dioxide nanoparticles (TiO(2)NPs) on their toxicity towards bacteria. The study highlights the lack of standardization and the importance of considering differences between in vivo and in vitro systems in toxicological assessments.
Titanium dioxide nanoparticles (TiO(2)NPs) usage is increasing in everyday consumer products, hence, assessing their toxic impacts on living organisms and environment is essential. Various studies have revealed the significant role of TiO(2)NPs physicochemical properties on their toxicity. However, TiO(2)NPs are still poorly characterized with respect to their physicochemical properties, and environmental factors influencing their toxicity are either ignored or are too complex to be assessed under laboratory conditions. The outcomes of these studies are diverse and inconsistent due to lack of standard protocols. TiO(2)NPs toxicity also differs for in vivo and in vitro systems, which must also be considered during standardization of protocols to maintain uniformity and reproducibility of results. This review critically evaluates impact of different physicochemical parameters of TiO(2)NPs and other experimental conditions, employed in different laboratories in determining their toxicity towards bacteria. These important observations may be helpful in evaluation of environmental risks posed by these nanoparticles and this can further assist regulatory bodies in policymaking.

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