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NanoFe3O4 accelerates anoxic biodegradation of 3, 5, 6-trichloro-2-pyridinol
- Source :
- Chemosphere. 235:185-193
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- 3, 5, 6-trichloro-2-pyridinol (TCP) is a widespread organic pollutant with persistent, mobile and high antimicrobial effects. Here, nanoFe3O4 was firstly introduced into the anoxic biodegradation of TCP. It was found that nanoFe3O4 significantly accelerated TCP biodegradation. The removal rate of TCP (100 mg L−1) increased from 83.03% to 98.74% within 12 h in the presence of nanoFe3O4, and the addition of nanoFe3O4 also promoted the accumulation of CO2. Reductive dechlorination mechanism was involved in anoxic biodegradation of TCP. Molecular approaches further revealed that nanoFe3O4 distinctly induced the shifts of bacterial community. The dominant genus Ochrobactrum was converted to genus Delftia in nanoFe3O4 treatment, and the relative abundance of Delftia increased from 10.26% to 44.62%. Meanwhile, the total relative abundance of bacteria related to TCP dechlorination and degradation significantly increased in the presence of nanoFe3O4. These results indicated that nanoFe3O4 induced the enrichment of TCP-degrading bacteria to promote the anoxic biodegradation of TCP.
- Subjects :
- Pollutant
Environmental Engineering
biology
Chemistry
Health, Toxicology and Mutagenesis
0208 environmental biotechnology
Public Health, Environmental and Occupational Health
02 engineering and technology
General Medicine
General Chemistry
010501 environmental sciences
Biodegradation
biology.organism_classification
01 natural sciences
Pollution
Anoxic waters
020801 environmental engineering
Delftia
Environmental chemistry
Reductive dechlorination
Environmental Chemistry
Degradation (geology)
Genus Ochrobactrum
Bacteria
0105 earth and related environmental sciences
Subjects
Details
- ISSN :
- 00456535
- Volume :
- 235
- Database :
- OpenAIRE
- Journal :
- Chemosphere
- Accession number :
- edsair.doi...........cbe4bc4348c1eed4e947f8cac3d71f63