[Kinetics and mechanism of 4-aminobenzenesulphonate biodegradation].
Kinetics of 4-aminobensenesulphonate (4-ABS) degradation by Pannonibacter sp. W1 under aerobic condition was studied. At medium and low initial concentration (50-1000 mg/L), the 4-ABS could be degraded almost completely in 14 h,and the degradation reaction conformed to one order kinetics. At high initial concentration (1 200-2500 mg/L), up to 90% degradation rate could be achieved in 32 h, and it conformed to zero order kinetics in earlier period of degradation and one order kinetics in later period of degradation. Haldane inhibition model was used to fit the special degradation rate at different initial concentration, and the parameters micro(max), K(s) and K(i) were determined to be 227.977 mg/(g x h), 84.306 mg/L and 1270.675 mg/L, respectively. UV spectrum and HPLC detection indicated that no other aromatic intermediates were accumulated during the 4-ABS degradation. The degradation of other substituted benzenes by strain W1 were detected, and the metabolic pathway of 4-ABS degradation was proposed.
Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, School of Environmental and Biological Science and Technology, Dalian University of Technology, Dalian 116023, China. aben_001@126.com
Yan-Qing
YQ
Wang
Jin-Song
JS
Zhang
Ji-Ti
JT
Zhou
Yu-Lin
YL
Hou
Mi
M
Zhou
Jun-Fang
JF
Li
D000332:Aerobiosis; D001673:Biodegradation, Environmental; D007700:Kinetics; D041902:Rhodobacteraceae / Q000145:classification* / Q000378:metabolism*; D013425:Sulfanilic Acids / Q000302:isolation & purification / Q000378:metabolism*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification / Q000378:metabolism
D013425:Sulfanilic Acids; D014874:Water Pollutants, Chemical; C100016:4-sulfanilic acid