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Degradation Characteristics of Phenolics by Diaphorobacter sp. Strain J5-51* (PDF)

Chinese Journal of Applied & Environmental Biology[ISSN:1006-687X/CN:51-1482/Q]

2016 03
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Degradation Characteristics of Phenolics by Diaphorobacter sp. Strain J5-51*
SUN Jiquan123 XU Lian123 CHEN Fuming3 & WU Xiaolei12
1College of Engineering, Peking University, Beijing 100871, China 2Institute of Innovation (Batou), Peking University, Batou, 014030, China 3Research Institute of Tsinghua University in Shenzhen, Shenzhen Key Laboratory. of Separation Technology, Shenzhen 518057, China
4-chlorophenol biodegradation Diaphorobacter cell immobilization

Degradation of 4-chlorophenol by Diaphorobacter sp. J5-51 was studied to understand its potential in application for treating phenolic pollutants. In addition to 4-chlorophenol, strain J5-51 could degrade phenol, pyridine, and three kinds of cresols in mineral salt medium. The results showed the optimal conditions for strain J5-51 to degrade 4-chlorophenol as pH 6.0–9.0 and 30–35 °C. Addition of Ni2+ and Co2+ (0.2 mmol/L, final concentration) inhibited the strain’s degradation of 4-chlorophenol, while Ca2+ (0.2 mmol/L, final concentration) could conversely enhance the degradation. The degradation rate of chlorophenol was negatively correlated with its initial concentration in mineral salt medium. From a mixture of phenolics, approximately 400 mg/L phenol and 100 mg/L cresols could be completely degraded within 72 hours. Finally, immobilization of strain J5-51 could enhance the degradation rate of phenolics.


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