Degradation of propanil by Acinetobacter baumannii DT immobilized in alginate

Authors

  • Danh Duc Ha*
  • Thi Oanh Nguyen

Abstract

The herbicide propanil has been widely applied in Vietnam and around the world to control weeds. In this study, Acinetobacter baumannii DT isolated from soil was used to determine propanil degradation. Degradation experiments were carried out with condensed cells at 109 CFU/ml with both free and immobilized forms of the bacteria. Propanil degradation rates by bacteria immobilized in alginate were higher than those of free cells at the same concentrations. The degradation curve as a function of concentration fit well to the degradation kinetics described by the Edwards model with a maximum degradation of 0.034±0.003 mM/h for free cells and 0.053±0.005 mM/h for immobilized cells. Moreover, the immobilized bacteria could tolerate higher propanil concentrations and degrade propanil in a well-known herbicide more effectively compared to the freely suspended bacteria. These results demonstrate that A. baumannii DT immobilized in alginate is suitable for degradation of propanil in herbicides.

Keywords:

Acinetobacter baumannii DT, degradation, immobilized cells, kinetics, propanil

DOI:

https://doi.org/10.31276/VJSTE.64(3).08-12

Classification number

2.2

Author Biographies

Danh Duc Ha

Dong Thap University, 783 Pham Huu Lau Street, Ward 6, Cao Lanh City, Dong Thap Province, Vietnam

Thi Oanh Nguyen

Dong Thap University, 783 Pham Huu Lau Street, Ward 6, Cao Lanh City, Dong Thap Province, Vietnam

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Published

2022-09-15

Received 5 October 2020; revised 24 December 2020; accepted 4 January 2021

How to Cite

Danh Duc Ha, & Thi Oanh Nguyen. (2022). Degradation of propanil by Acinetobacter baumannii DT immobilized in alginate. Vietnam Journal of Science, Technology and Engineering, 64(3), 8-12. https://doi.org/10.31276/VJSTE.64(3).08-12

Issue

Section

Physical Sciences