黄河酚污染物生物降解动力学特征研究

Biodegradation Kinetics of Phenols in the Yellow River

为了研究酚类污染物在黄河中生物降解的动力学特征,用含有苯酚和2-甲基苯酚为唯一碳源的液体培养基,分别接种黄河原水和黄河底质提取液,通过培养与细菌计数,利用统计学方法,计算出水中细菌和底质细菌降解苯酚和2-甲基苯酚时的最大比生长速率μmax和半饱和常数Ks。结果表明,黄河底质细菌降解苯酚类化合物的μmax约为原水中细菌的2倍;酚类污染物的分子结构直接影响其生物降解速率。

In order to discover the phenols biodegradation characteristics in the Yellow River, the liquid media were compounded with phenol and 2-methyl phenol as only carbon source. The water of the Yellow River and lixivium from the Yellow River sediment were inoculated into these media. After batch culture and counting of bacteria, statistics were used to calculate the maximum specific growth rate （μmax） and half-saturation constant （Ks）. The conclusion are as follows： ①The/Zmax of bacteria from the sediment is nearly double faster than it from the water;②When molecule structure of phenols is different, the μmax has apparently change.