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Biodegradation of 2,4‐dichlorophenoxy acetic acid (2,4‐d) by pseudomonas cepacia: Stoichiometric study
Author(s) -
Fradette Sylvie,
Leduy Anh,
Rho Denis,
Samson Réjean
Publication year - 1994
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450720315
Subject(s) - pseudomonas , biodegradation , acetic acid , chemistry , microbiology and biotechnology , bacteria , organic chemistry , biology , genetics
Pseudomonas cepacia biodegraded 2,4‐dichlorophenoxyacetic acid (2,4‐D) according to the following stoichiometric equation: C 8 H 6 Cl 2 O 3 + c 1 O 2 + c 2 NH 3 → c 3 CH x N z O y + c 4 CO 2 + c 5 H 2 O + c 6 Cl − + c 7 REIM where CH x N z O y represents the bacterial cells and REIM is the residual extracellular intermediate metabolites. The stoichiometric coefficients c 1 to c 7 were determined from C, N, O, H and Cl balances together with the experimental data on the biodegradation of 14 C‐carboxy‐labeled‐2,4‐D and 14 C‐ring‐uniformly‐labeled‐2,4‐D. The stoichiometric equation obtained predicted satisfactorily the total oxygen consumption for and the total heat production from the biodegradation of 2,4‐D for a wide range of initial concentrations from 80 to 500 mg/L.