Biodegradation of bezafibrate by the activated sludge under aerobic condition:Effect of initial concentration,temperature and pH  

作　　者：Qian Sui Pingping Yan Xuqi Cao Shuguang Lu Wentao Zhao Maozhe Chen 

机构地区：[1]State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process,School of Resources and Environmental Engineering,East China University of Science and Technology,Shanghai 200237,China [2]State Key Laboratory of Pollution Control and Resource Reuse,College of Environmental Science and Engineering,Tongji University,Shanghai 200092,China [3]Beijing Key Laboratory for Emerging Organic Contaminants Control,Tsinghua University,Beijing 100084,China [4]Shanghai Center for Energy-Saving and Emission-Reduction Co.,Ltd,Shanghai 200003,China [5]Journal of Water Purification Technology,Shanghai 200082,China

出　　处：《Emerging Contaminants》2016年第4期173-177,共5页新兴污染物（英文）

基　　金：This research was partly supported by the National Natural Science Foundation of China(21577033,51208199,51408425);the Fundamental Research Funds for the Central Universities(22A201514057);Beijing Key Laboratory for Emerging Organic Contaminants Control,the Foundation of The State Key Laboratory of Pollution Control and Resource Reuse,China(PCRRY 11017);the Specialized Research Fund for the Doctoral Program of Higher Education of China(20130072120033).

摘　　要：Lab-scale experiments were conducted to investigate the effect of initial concentration,temperature and pH on the removal of bezafibrate(BF)by activated sludge under aerobic condition.The results showed that adsorption of BF onto activated sludge was negligible,and biodegradation was the main removal mechanism of BF.The removal of BF in the aqueous phase by the activated sludge can be described by a pseudo-first-order reaction.The reaction rate constants had a negative relationship with the initial concentration of BF,and dramatically reduced from 0.050 to 0.007 h^-1,when the temperature dropped from 20℃to 10℃.Variation of pH between 5.0 and 9.0 did not have significant influence on the removal of BF,indicating a high adaptation of microorganism in the activated sludge responsible for BF degradation to a wide pH range.The findings of this study are helpful to improve the removal of pharmaceuticals during the wastewater treatment plants by selecting the appropriate process variables,and eventually eliminate their release to the environment.

关 键 词：PPCPS BIODEGRADATION Sludge Initial concentration TEMPERATURE PH 

分 类 号：X70[环境科学与工程—环境工程]