3种污泥对磺胺二甲基嘧啶的吸附性能

研究了厌氧颗粒污泥、厌氧污泥及好氧污泥对磺胺二甲基嘧啶(SM2)的吸附性能。当SM2初始浓度为50μg/L时,采用活性污泥灭活吸附,考察了吸附平衡时间、吸附等温线及温度对污泥吸附的影响,并比较了失活污泥与活性污泥的吸附性能。结果表明,3种污泥对SM2的吸附均在1 h内达到吸附平衡;3种失活污泥对SM2的吸附都可用Freundl-ich和Langmuir吸附模型来描述,并且Freundlich吸附模型的拟合效果要好于Langmuir模型(R2F>R2L);温度对3种污泥吸附影响规律一致,并且吸附常数KF(15℃)>KF(25℃)>KF(35℃),这说明吸附为放热反应,低温有利于吸附反应的进行。活性污泥对SM2的吸附与失活污泥吸附规律一致,都符合Freundlich模型。3种活性污泥对SM2的去除是吸附和降解的共同作用,并且都是降解占主导地位,降解效率为厌氧污泥>好氧污泥>厌氧颗粒污泥。

Adsorption characteristics of sulfamethazine by three kinds of sludge

The adsorption characteristics of sulfamethazine by three kinds of sludge including anaerobic granular sludge,anaerobic sludge and aerobic sludge were investigated.The effects of adsorption equilibrium time and temperature on the adsorption of SM2 by inactivated sludge were studied when the SM2 concentration was 50 μg/L.The research also compared the adsorption characteristics of inactivated and activated sludge.The results showed that the adsorption of SM2 by three kinds of sludge was a rapid process and the adsorption equilibrium was established in 1 h.The adsorption by three kinds of sludge fitted both Freundlich and Langumir model,but Freundlich model fitted better than Langumir model(R2F>R2L).The temperature had same effect on the adsorption by three kinds of sludge and the the capacity parameter KF(15℃)>KF(25℃)>KF(35℃).This showed that the adsorption was exothermic,low temperatures favored adsorption reaction.According to the fitting results,three kinds of inactivated sludge had little adsorption difference from activated sludge,which also fitted Freundlich model.The removal of SM2 by three kinds of activated sludge was the combined effect of adsorption and degradation,and degradation played the leading role.The degradation efficiency of SM2 is anaerobic sludge> aerobic sludge> anaerobic granular sludge.