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Co-metabolic degradation of iomeprol by a Pseudomonas sp. and its application in biological aerated filter systems.
- Source :
-
Journal of Environmental Science & Health. Part A. Toxic/Hazardous Substances & Environmental Engineering . 2018, Vol. 53 Issue 4, p310-316. 7p. - Publication Year :
- 2018
-
Abstract
- The non-ionic water-soluble X-ray contrast agent iomeprol (IOM) enters the water supply through sewage treatment plants, which can cause considerable environmental harm. In this study,Pseudomonassp. I-24 (I-24) was tested for its ability to remove IOM from water via co-metabolic pathways. The optimum removal rate of IOM by I-24 was 38.43% ± 3.70% when starch served as the source of external carbon, and its co-metabolism of IOM conformed to the first-order kinetics. The highest activity of intracellular enzyme (degrading enzyme) extracted from I-24 was 0.143 ± 0.005 mU in starch condition. The Michaelis constant of the degrading enzyme was found to be 91.08 μmol L−1. However, glucose and maltose showed the best promotive effects on the growth and electron transport activity of I-24, indicating that overgrowth may result in competitive inhibition and a reduced degradation rate of IOM. Adding I-24 and degrading enzymes to biological aerated filters increased IOM removal rates without affecting CODMnremoval. [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 10934529
- Volume :
- 53
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Journal of Environmental Science & Health. Part A. Toxic/Hazardous Substances & Environmental Engineering
- Publication Type :
- Academic Journal
- Accession number :
- 128104311
- Full Text :
- https://doi.org/10.1080/10934529.2017.1401385