摘要
以第二松花江哨口断面江水为微生物源,对硝基苯的生物降解动力学进行研究。结果表明,硝基苯在江水中的生物降解过程可由对数方程S=S_0+X_0(1—e^(μmt))描述;丙酮作标准液溶剂时,硝基苯的生物降解速率符合一级动力学方程;由此得到硝基苯生物降解动力学参数,即微生物最大比增长速率μm和一级速率常数K。硝基苯的初始浓度(53.5—535μg/L)对l'm没有明显的影响,温度、驯化条件对μm的影响显著,硝基芳烃、氯苯类化合物对硝基苯的降解有抑制作用。
Nitrobenzene and river water sample collected from the Saokou section of the Second Songhua River were selected as the substrate and the source of microorganism respectively. The effects of initial concentrations of nitrobenzene, acclimating conditions and temperature on the rate of biodegradation were studied. Results showed that the process of biodegradation of nitrobenzene (53.5-535 μg/l) in river water can be described by a logarithmic equation as follows. S=S0 +X0 (1-enmt),and the parameter μm is uneffected by the initial concentrations of substrate but effected considerably by temperature and acclimating conditions. The biodegradation reaction of nitrobenzene was inhibited by the co-existing aromatic nitro-compounds and chlorobenzenes but promoted by acetone. In the presence of acetone, the biodegradation rate of nitrobenzene was shown to fit the equation of first order kinetics.
出处
《环境化学》
CAS
CSCD
北大核心
1991年第6期24-30,共7页
Environmental Chemistry
