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Effect of Chlamydomonas reinhardtii on the fate of CuO nanoparticles in aquatic environment
- Source :
- Chemosphere. 247
- Publication Year :
- 2019
-
Abstract
- In this study, the effect of Chlamydomonas reinhardtii on the fate of CuO nanoparticles (CuO-NPs) in aquatic environment were investigated in terms of the colloidal stability, the free Cu2+ releasing, extracellular adsorption Cu (Cuex) and intracellular assimilation Cu (Cuin). The results showed that, with the increasing microalgal density, the absolute value of zeta potential of CuO-NPs decreased and the mean hydrodynamic diameter (MHD) became larger, leading to a better aggregation and settling behavior of CuO-NPs. The microalgae also promoted the free Cu2+ releasing, however, inhibited adsorption and assimilation of metal nanoparticles (MNPs) into microalgal cells, resulting in the reduction of the Cuex and Cuin per microalgal cell. The phenomenon was probably due to the reduced chance of contact between microalgae and MNPs. The internalization of CuO-NPs was also observed in microalgal cells by high resolution transmission electron microscope (HRTEM). Furthermore, the results of fast fourier transform (FFT)/inversed FFT (IFFT) analysis indicated that the CuO-NPs was reduced to Cu2O-NPs in the microalgae cells. The above results suggested that the microalgae can significantly affect the fate of MNPs, and subsequently, influencing the bioavailability and toxicity of MNPs in the aquatic environment.
- Subjects :
- inorganic chemicals
Environmental Engineering
Health, Toxicology and Mutagenesis
0208 environmental biotechnology
Chlamydomonas reinhardtii
Biological Availability
Metal Nanoparticles
02 engineering and technology
010501 environmental sciences
01 natural sciences
Colloid
Adsorption
Microscopy, Electron, Transmission
Zeta potential
Microalgae
Environmental Chemistry
High-resolution transmission electron microscopy
0105 earth and related environmental sciences
biology
Chemistry
technology, industry, and agriculture
Public Health, Environmental and Occupational Health
Assimilation (biology)
General Medicine
General Chemistry
biology.organism_classification
Pollution
020801 environmental engineering
Bioavailability
Chemical engineering
Transmission electron microscopy
Nanoparticles
Copper
Water Pollutants, Chemical
Subjects
Details
- ISSN :
- 18791298
- Volume :
- 247
- Database :
- OpenAIRE
- Journal :
- Chemosphere
- Accession number :
- edsair.doi.dedup.....091029b1621f17fd9af4d2ab84c91f60