Indian Journal of Microbiology

, Volume 58, Issue 2, pp 193–200 | Cite as

Transformation Products of Carbamazepine (CBZ) After Ozonation and their Toxicity Evaluation Using Pseudomonas sp. Strain KSH-1 in Aqueous Matrices

  • Kshitiz Dwivedi
  • Ashwinkumar P. Rudrashetti
  • Tapan Chakrabarti
  • R. A. Pandey
Original Research Article


Carbamazepine (CBZ) is an anti-epileptic and anti-convulsant drug widely used for the treatment of epilepsy and other bipolar disorders. Ozone as an advanced oxidation process has been widely used for the degradation of CBZ resulting in the formation of transformation products (ozonides). The present research aims to isolate and identify potential microorganism, capable of degradation of CBZ and its transformation products. The cell viability and cytotoxicity of pure CBZ and their ozone transformation products were evaluated using the cells of Pseudomonas sp. strain KSH-1 through cell viability assay tests. The cells metabolic activity was assessed at varying CBZ concentrations (~ 10–25 ppm, pure CBZ) and cumulatively for ozone transformation products. For pure CBZ, % cell viability decreases as CBZ concentration increases, while, in case of post-ozonated CBZ transformation products, the viability decreases initially and then increases upon exposure of ozone with a maximum cell viability of 97 ± 2.8% evaluated for 2 h post-ozonated samples.


Carbamazepine (CBZ) Ozonation Viability assay MTT 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide 



Kshitiz Dwivedi is supported by fellowship from Department of Science and Technology (DST) under the program INSPIRE (Grant No. DST-INSPIRE/IF-120178). We express our sincere thanks to Dr. Sanjeev Kanojiya from Sophisticated Analytical Instrument Facility (SAIF, supported by DST), CSIR-Central Drug Research Institute (CDRI), Lucknow for assistance with LC–MS and LC–MS/MS analysis. The authors would like to acknowledge Knowledge Resource Centre (KRC), CSIR-NEERI, for plagiarism check for which the accession number is CSIR-NEERI/KRC/2017/OCT/EBGD/3.

Compliance with Ethical Standards

Conflict of interest

The authors declare that they have no conflicts of interest.

Supplementary material

12088_2018_715_MOESM1_ESM.docx (1.4 mb)
Supplementary material 1 (DOCX 1422 kb)


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Copyright information

© Association of Microbiologists of India 2018

Authors and Affiliations

  1. 1.CSIR-National Environmental Engineering Research Institute (NEERI)NagpurIndia
  2. 2.Rashtrasant Tukadoji Maharaj Nagpur University (RTMNU)NagpurIndia

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