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Microstructure and antioxidative capacity of the microalgae mutant Chlorella PY-ZU1 during tilmicosin removal from wastewater under 15% CO 2 .
- Source :
-
Journal of hazardous materials [J Hazard Mater] 2017 Feb 15; Vol. 324 (Pt B), pp. 414-419. Date of Electronic Publication: 2016 Nov 03. - Publication Year :
- 2017
-
Abstract
- The response mechanisms of microalgal mutant Chlorella PY-ZU1 cells were investigated in their removal of antibiotic tilmicosin from wastewater under 15% CO <subscript>2</subscript> . Low concentrations (0.01-2mgL <superscript>-1</superscript> ) of tilmicosin in wastewater stimulated the growth of microalgal cells, whereas high concentrations (5-50mgL <superscript>-1</superscript> ) of tilmicosin significantly inhibited cell growth. When initial tilmicosin concentration increased from 0 to 50mgL <superscript>-1</superscript> , fractal dimension of microalgal cells monotonically increased from 1.36 to 1.62 and cell size monotonically decreased from 4.86 to 3.75μm. In parallel, malondialdehyde content, which represented the degree of cellular oxidative damage, monotonically increased from 1.92×10 <superscript>-7</superscript> to 7.07×10 <superscript>-7</superscript> nmol cell <superscript>-1</superscript> . Superoxide dismutase activity that represented cellular antioxidant capacity first increased from 2.59×10 <superscript>-4</superscript> to the peak of 6.60×10 <superscript>-4</superscript> U cell <superscript>-1</superscript> , then gradually decreased to 2.39×10 <superscript>-4</superscript> U cell <superscript>-1</superscript> . The maximum tilmicosin removal efficiency of 99.8% by Chlorella PY-ZU1 was obtained at the initial tilmicosin concentration of 50mgL <superscript>-1</superscript> .<br /> (Copyright © 2016 Elsevier B.V. All rights reserved.)
- Subjects :
- Biodegradation, Environmental
Carbon Dioxide pharmacology
Chlorella genetics
Chlorella growth & development
Malondialdehyde metabolism
Microalgae genetics
Microalgae growth & development
Mutation
Plant Proteins metabolism
Superoxide Dismutase metabolism
Tylosin metabolism
Waste Disposal, Fluid methods
Wastewater
Anti-Bacterial Agents metabolism
Chlorella metabolism
Microalgae metabolism
Tylosin analogs & derivatives
Water Pollutants, Chemical metabolism
Subjects
Details
- Language :
- English
- ISSN :
- 1873-3336
- Volume :
- 324
- Issue :
- Pt B
- Database :
- MEDLINE
- Journal :
- Journal of hazardous materials
- Publication Type :
- Academic Journal
- Accession number :
- 27829514
- Full Text :
- https://doi.org/10.1016/j.jhazmat.2016.11.006