Degradation of chlorophenols using pentachlorophenol-degrading bacteria Sphingomonas chlorophenolica in a batch reactor.
Chlorophenols are common environmental contaminants that have been used as the major component in wide-spectrum biocides in industry and agriculture. Many chlorophenols tend to persist in the environment and may become public health hazards. This research studied the ability of the pentachlorophenol (PCP)-degrading bacterium Sphingomonas chlorophenolica to degrade and dechlorinate other chlorophenols. In addition, the characteristics of S. chlorophenolica were also investigated. When S. chlorophenolica cells were preincubated with PCP, the lag phase PCP degradation periods became shorter and the PCP concentrations that could be removed became higher. S. chlorophenolica was able to completely degrade 2,3,6-trichlorophenol (2,3,6-TCP), 2,4,6-trichlorophenol (2,4,6-TCP), 2,3,4,6-tetrachlorophenol (2,3,4,6-TeCP), and PCP within 38.1, 15.1, 11.8, and 11.8 h, and to release concentrations of 50.1, 60.9, 63.7, and 58.5 mg/L chloride at the same period of time. In the presence of supplementary carbon sources, the PCP removal efficiency increased with the presence of glucose or pyruvate. However, the removal efficiency of 75 mg/L 2,4-dichlorophenol did not increase with supplemental carbon sources.
Yang
Chu-Fang
CF
Department of Environmental Engineering, National Chung Hsing University, Taichung, 402, Taiwan, ROC. maine_ycf@yahoo.com.tw
Lee
Chi-Mei
CM
Wang
Chun-Chin
CC
D001673:Biodegradation, Environmental; D019149:Bioreactors; D002733:Chlorophenols / Q000378:metabolism*; D003470:Culture Media; D005947:Glucose; D010416:Pentachlorophenol / Q000378:metabolism*; D019289:Pyruvic Acid; D020578:Sphingomonas / Q000378:metabolism*; D013997:Time Factors
D002733:Chlorophenols; D003470:Culture Media; D019289:Pyruvic Acid; D010416:Pentachlorophenol; D005947:Glucose