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Date of Publication:2013-01-01

Journal:环境科学与技术

Volume:36

Issue:3

Page Number:83-88

ISSN No.:1003-6504

Abstract:Biodegradation of dye wastewater is becoming a hot research field in
   recent years. Through gradient acclimation, a novel strain C-2 was
   isolated from soil in the laboratory, which could decolorize Acid Red
   GR, the sulfonated azo dyes effectively. The strain C-2 was identified
   as Acinetobacter sp. by 16S rDNA sequence analysis. The optimal
   conditions of decolorization estimated by response surface methodology
   (RSM) were as 17.5 g·L~(-1) of strain C-2, 100 mg·L~(-1) of initial GR
   concentration, 2.50 g·L~(-1) of yeast extract and 3.00 g·L~(-1) of
   fructose. Under the optimal conditions, the maximal decolorization
   efficiency was 99% within 14h. The decolorization kinetics was fitted
   well with Haldane equation, and the maximum specific decolorization
   rate, affinity constant and inhibition constant were found to be 328.33
   mg·(g·h)~(-1), 309.69 mg·L~(-1) and 1,365.83 mg·L~(-1) respectively. The
   calculated optimal specific decolorization rate and GR concentration
   were 105.91 mg·(g·h)~(-1) and 650.37 mg·L~(-1). The results suggested
   that the strain C-2 with highly decolorizing activity could be useful
   for the practical bioremediation.

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