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Title of Journal: Water Air Soil Pollut

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Abbravation: Water, Air, & Soil Pollution

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Springer International Publishing

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DOI

10.1016/0360-3016(89)90031-x

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ISSN

1573-2932

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Influence of pH on the Toxicity of Silver Nanopart

Authors: Abdallah Oukarroum Mahshid Samadani David Dewez
Publish Date: 2014/07/02
Volume: 225, Issue: 8, Pages: 2038-
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Abstract

The aim of this study was to investigate the effect of pH 4 and 7 on the cellular toxicity impact of silver nanoparticles AgNPs on the green alga Chlamydomonas acidophila Changes in chlorophyll content cellular viability and reactive oxygen species ROS formation were determined permitting the characterization of the toxicity of AgNPs Chemical characterization of AgNPs in suspension showed that nanoparticle size distribution was dependent to the pH of the culture medium and a higher solubility was observed at pH 4 compared to that at pH 7 After 24 h of exposure results indicated that the chlorophyll content and cellular viability decreased significantly while the intracellular ROS production increased significantly in relation to the increasing concentration of AgNPs 01–100 mg/L Therefore our results demonstrated that AgNPinduced toxicity was pH dependent as indicated by the cytotoxicity mediated through the induction of oxidative stress In conclusion the characterization of the physicochemical properties of AgNPs in aqueous solution having different pH is essential for the understanding of their toxicity impact on algal cells

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