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Article

Ecotoxicological Studies of ZnO and CdS Nanoparticles on Chlorella vulgaris Photosynthetic Microorganism in Seine River Water

1
Université de Paris, ITODYS, UMR 7086, CNRS, 15 rue Jean-Antoine de Baïf, F-75205 Paris CEDEX 13, France
2
Sorbonne Université, Institut de Minéralogie et de Physique des Milieux Condensés UMR CNRS 7590, Institut de Recherche pour le Développement 4, place Jussieu, 75005 Paris, France
3
Muséum National d’Histoire Naturelle, UMR 7245 CNRS, USM 505, Département Régulations, Développement, et Diversité Moléculaire (RDDM), 12 rue Buffon, F-75005 Paris, France
*
Author to whom correspondence should be addressed.
Nanomaterials 2020, 10(2), 227; https://doi.org/10.3390/nano10020227
Received: 28 October 2019 / Revised: 9 December 2019 / Accepted: 10 December 2019 / Published: 28 January 2020
Seine river water was used as natural environmental medium to study the ecotoxicological impact of ZnO and CdS nanoparticles and Zn2+ and Cd2+ free ions using Chlorella vulgaris as a biological target. It was demonstrated by viability tests and photosynthetic activity measurements that free Zn2+ (IC50 = 2.7 × 10−4 M) is less toxic than free Cd2+ and ZnO nanoparticles (IC50 = 1.4 × 10−4 M). In the case of cadmium species, free Cd2+ (IC50 = 3.5 × 10−5 M) was similar to CdS nanoparticles (CdS-1: IC50 = 1.9 × 10−5 M and CdS-2: IC50 = 1.9 × 10−5 M), as follows: CdS > Cd2+ > ZnO > Zn2+. Adenosine-5’-triphosphate (ATP) assay and superoxide dismutase (SOD) enzymatic activity confirmed these results. Transmission electron microscopy (TEM), coupled with energy-dispersive X-ray spectroscopy (EDS), confirmed the internalization of CdS-1 nanoparticles after 48 h of contact with Chlorella vulgaris at 10−3 M. With a higher concentration of nanoparticles (10−2 M), ZnO and CdS-2 were also localized inside cells. View Full-Text
Keywords: polyol process; CdS; ZnO; ecotoxicology; Chlorella vulgaris polyol process; CdS; ZnO; ecotoxicology; Chlorella vulgaris
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MDPI and ACS Style

da Rocha, A.; Menguy, N.; Yéprémian, C.; Couté, A.; Brayner, R. Ecotoxicological Studies of ZnO and CdS Nanoparticles on Chlorella vulgaris Photosynthetic Microorganism in Seine River Water. Nanomaterials 2020, 10, 227. https://doi.org/10.3390/nano10020227

AMA Style

da Rocha A, Menguy N, Yéprémian C, Couté A, Brayner R. Ecotoxicological Studies of ZnO and CdS Nanoparticles on Chlorella vulgaris Photosynthetic Microorganism in Seine River Water. Nanomaterials. 2020; 10(2):227. https://doi.org/10.3390/nano10020227

Chicago/Turabian Style

da Rocha, Alice, Nicolas Menguy, Claude Yéprémian, Alain Couté, and Roberta Brayner. 2020. "Ecotoxicological Studies of ZnO and CdS Nanoparticles on Chlorella vulgaris Photosynthetic Microorganism in Seine River Water" Nanomaterials 10, no. 2: 227. https://doi.org/10.3390/nano10020227

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