NDLI: Comparative study on toxicity of ZnO and TiO$_{2}$ nanoparticles on Artemia salina: effect of pre-UV-A and visible light irradiation

Content Provider	Springer Nature Link
Author	Bhuvaneshwari, M. Sagar, Bhawana Doshi, Siddharth Chandrasekaran, N. Mukherjee, Amitava
Copyright Year	2016
Abstract	This study evaluated the toxicity potential of ZnO and TiO$_{2}$ nanoparticles under pre-UV-A irradiation and visible light condition on Artemia salina. The nanoparticle suspension was prepared in seawater medium and exposed under pre-UV-A (0.23 mW/cm$^{2}$) and visible light (0.18 mW/cm$^{2}$) conditions. The aggregation profiles of both nanoparticles (NPs) and dissolution of ZnO NPs under both irradiation conditions at various kinetic intervals (1, 24, 48 h) were studied. The 48-h LC$_{50}$ values were found to be 27.62 and 71.63 mg/L for ZnO NPs and 117 and 120.9 mg/L for TiO$_{2}$ NPs under pre-UV-A and visible light conditions. ZnO NPs were found to be more toxic to A. salina as compared to TiO$_{2}$ NPs. The enhanced toxicity was observed under pre-UV-A-irradiated ZnO NPs, signifying its phototoxicity. Accumulation of ZnO and TiO$_{2}$ NPs into A. salina depends on the concentration of particles and type irradiations. Elimination of accumulated nanoparticles was also evident under both irradiation conditions. Other than ZnO NPs, the dissolved Zn$^{2+}$ also had a significant effect on toxicity and accumulation in A. salina. Increased catalase (CAT) activity in A. salina indicates the generation of oxidative stress due to NP interaction. Thus, this study provides an understanding of the toxicity of photoreactive ZnO and TiO$_{2}$ NPs as related to the effects of pre-UV-A and visible light irradiation.
Starting Page	5633
Ending Page	5646
Page Count	14
File Format	PDF
ISSN	09441344
Journal	Environmental Science and Pollution Research
Volume Number	24
Issue Number	6
e-ISSN	16147499
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-12-30
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	ZnO nanoparticles TiO$_{2}$ nanoparticles Pre-UV-A Artemia salina Seawater Environment Environmental Chemistry Ecotoxicology Environmental Health Atmospheric Protection/Air Quality Control/Air Pollution Waste Water Technology Water Pollution Control Water Management Aquatic Pollution
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Health, Toxicology and Mutagenesis Pollution Medicine

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