Title: Influence of environmental factors on degradation of carbendazim by Bacillus pumilus strain NY97-1

Authors: Lizhen Zhang, Xiongwu Qiao, Liping Ma

Addresses: College of Life Science and Technology, Shanxi University, No. 36, Wucheng Road, Taiyuan 030006, PR China; Shanxi Key Laboratory of Pesticide Science, Shanxi Academy of Agricultural Sciences, No. 64. North Nongke Road, Taiyuan 030031, PR China. ' Shanxi Key Laboratory of Pesticide Science, Shanxi Academy of Agricultural Sciences, No. 64, North Nongke Road, Taiyuan 030031, PR China. ' Shanxi Key Laboratory of Pesticide Science, Shanxi Academy of Agricultural Sciences, No. 64, North Nongke Road, Taiyuan 030031, PR China

Abstract: The influence of environmental factors on the performance of carbendazim degradation by Bacillus pumilus strain NY97-1 was investigated under aerobic conditions. The carbendazim degradation in culture medium was characterised by High-Performance Liquid Chromatography (HPLC) with UV detector. When the initial concentration of carbendazim was 10, 30, 50, 100, 300 mg/L, the degradation rate was 42.44, 48.97, 77.19, 78.66 and 90.07%, respectively after 24 h at 30°C. Addition of small amount of organic nitrogenous source had a significant influence on carbendazim degradation, while the inorganic nitrogenous source had negative effect. Carbendazim degradation rate varied from 61.55% to 87.76% when pH value within the range of 4–10 after addition of organic nitrogen, the lowest carbendazim degradation percentage of 61.55% was obtained at pH 4.

Keywords: carbendazim degradation; HPLC; high-performance liquid chromatography; Bacillus pumilus; bioremediation.

DOI: 10.1504/IJEP.2009.027231

International Journal of Environment and Pollution, 2009 Vol.38 No.3, pp.309 - 317

Published online: 18 Jul 2009 *

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