School of Environmental and Biological Science and Technology, Key Laboratory of Industrial Ecology and Environmental Engineering, Dalian University of Technology, Dalian, China.
Appl Biochem Biotechnol. 2009 Dec;159(3):623-33. doi: 10.1007/s12010-008-8494-7. Epub 2009 Jan 21.
High salt concentration and salinity fluctuations in wastewater challenge the efficiency of microbial strains used for cleanup of pollutants. In this study, it was investigated that the new isolated Arthrobacter sp. W1 degraded mixed phenolic compounds under complex salt conditions. The results showed that Arthrobacter sp. W1 was able to utilize various phenolic compounds as carbon source under high salt conditions. It can degrade phenol and p-cresol mixture at 10% NaCl, although rates of degradation and cell growth were lower compared to 5% NaCl. The presence of trace p-cresol significantly inhibited phenol biodegradation. When salinity fluctuations were between 1% and 10% NaCl, strain W1 was able to degrade substrates and survived. It was also suggested that the presence of salts (i.e., NaCl, KCl, Na(2)SO(4), and K(2)SO(4)) had almost no effects on the microbial growth and biodegradation process. Therefore, Arthrobacter sp. W1 would be a promising candidate for bioremediation of phenolic compounds under complex salt conditions.
高盐浓度和盐度波动会影响用于污染物清理的微生物菌株的效率。在这项研究中，研究了新分离的节杆菌属 W1 在复杂盐度条件下对混合酚类化合物的降解能力。结果表明，节杆菌属 W1 能够在高盐条件下利用各种酚类化合物作为碳源。它可以在 10%NaCl 下降解苯酚和对甲酚的混合物，尽管降解速率和细胞生长速度比 5%NaCl 时要低。痕量对甲酚的存在显著抑制了苯酚的生物降解。当盐度波动在 1%到 10%NaCl 之间时，菌株 W1 能够降解底物并存活。研究还表明，盐（即 NaCl、KCl、Na2SO4 和 K2SO4）的存在对微生物生长和生物降解过程几乎没有影响。因此，节杆菌属 W1 有望成为复杂盐度条件下酚类化合物生物修复的候选菌株。
