【摘要】 废水中较高浓度的2,4-二氯酚(2,4-DCP)以溶解态和胶体2种形态存在。研究了间歇式电辅助微生物体系(IEMS)和连续式电辅助微生物体系(CEMS)对较高浓度2,4-DCP的还原降解效果。结果表明CEMS对溶解性2,4-DCP的降解符合零级反应动力学特征,动力学常数为0.245 h-1,对2,4-DCP降解中间产物邻氯酚(2-CP)和对氯酚(4-CP)的降解也为零级反应,动力学常数分别为0.048、0.081 5 h-1。IEMS在停止电辅助期间对胶体态2,4-DCP的水解效率远高于CEMS,2个体系均为零级反应,动力学常数分别为0.083 4、0.027 1 h-1。较高浓度的2,4-DCP宜采用IEMS处理。更多还原

【Abstract】 2,4-dichlorophenol(2,4-DCP) having higher concentration in wastewater exists in two states:dissolved and colloidal. The reduction and degradation effects of 2,4-DCP having higher concentration treated by an intermittent electro-assisted microbial system(IEMS)and a continuous electro-assisted microbial system(CEMS) have been studied. The results show that the degradation of the dissolved 2,4-DCP treated by the CEMS conforms to the zeroorder kinetic characteristics and the kinetic constants is 0.245 h-1. For 2,4-DCP degraded intermediate products 2-CP and 4-CP,the degradation are also zero-order reaction. The kinetic constants are 0.048 h-1and 0.081 5 h-1,respectively. The hydrolysis efficiency of colloidal 2,4-DCP,while IEMS stops having electric auxiliary,is much higher than that of CEMS. The two systems are both zero-order reaction. The kinetic constants are 0.083 4 h-1and 0.027 1 h-1,respectively.It is suitable for 2,4-DCP having higher concentration to be treated by IEMS.更多还原