摘要:
利用测定微生物呼吸耗氧量的方法,对氯代苯及氯代酚类中的7种优先污染物(氯苯、邻二氯苯、间二氯苯、对二氯苯、1,2,4-三氯苯、邻氯酚、2,4-二氯酚),用经它们分别驯化的活性污泥对其好氧生物降解动力学进行了研究.结果表明:7种受试物在活性污泥中的降解符合一级动力学关系,其降解速率常数由大到小具有如下顺序:邻氯酚、2,4-二氯酚、氯苯、邻二氯苯、间二氯苯、对二氯苯、1,2,4-三氯苯.在温度15-30℃范围内,7种受试物的降解速率常数随着温度的升高而增大,其变化关系符合阿仑尼乌斯公式.
Abstract:
By measuring the respiratory oxygen consumption, a study on the aerobic biodegra-dation kinetics of seven priority pollutants(chlorobenzene,o-,m- and p-dichlorobenzene, 1,2,4-trichlorobenzene,o-chlorophenol and 2,4-dichlorophenol) was conducted using activated sludge acclimated by themselves respectively. The experimental results show that the aerobic biodegradation of tested compounds follows the first-order kinetics and the rank of biodegradation rate constant from great to small is o-chlorophenol, 2,4-dichlorophenol, chlorobenzene, o-, m- and p-dichlorobenzene and 1,2,4-trichlorobenzene. When the temperature is 15-30C the increase of temperature stimulates the biodegradation and the relation between the biodegradation rate constant and temperature is complied with Arrhenius equation.
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