好氧污泥对17β-雌二醇吸附性能的研究  

Adsorption of 17β-estradiol to aerobic activated sludge

作　　者：曾庆玲[1] 李咏梅[1] 顾国维[1] 

机构地区：[1]同济大学污染控制与资源化研究国家重点实验室,上海200092

出　　处：《环境污染与防治》2007年第2期90-94,共5页Environmental Pollution & Control

基　　金：国家自然科学基金资助项目(No50578114)

摘　　要：研究了好氧活性污泥与失活好氧污泥对17β-雌二醇的吸附性能。17β-雌二醇初始质量浓度为500-10000ng／L，采用失活好氧污泥进行吸附，考察了吸附平衡时间、pH与温度对吸附的影响。研究结果表明，失活好氧污泥对17β-雌二醇的吸附在30min内达到平衡；pH在6～9时对吸附没有影响，pH为9以上时，随着pH升高吸附量减少；温度升高吸附能力降低；其吸附符合Fretmdlich吸附，且呈线性吸附。在10、20、30℃时，Freundlich吸附常数KF分别为91．81、80．65、61．49L／kg，分配系数Kd分别为561．80、435．60、306．70L／kg。另外研究了20℃时好氧活性污泥的KF与Kd，它们分别为91．72、514．90L／kg，与同温下失活好氧污泥的KF和Kd差别均小于20%。Adsorption isotherm runs were performed to measure capacity of inactivated aerobic activated sludge for 17β-estradiol and to determine the effects of pH and temperature. The adsorption equilibrium was established in 30 min; the experimental data of equilibrium concentrations and the corresponding adsorptive capacities were well correlated by both Freundlich and linear adsorption isotherm models. No significant pH effect was observed at 20℃ ,since the same sludge dose added to estradiol solutions （500, 5 000, 10 000 ng/L） at pH of 6, 7, 8 and 9 produced nearly the same final concentrations. When pH〉9, the adsorptive capacities decreased with increasing pH value. The adsorptive capacities decreased with increasing temperature; the Freundlich capacity parameter （KF） and the distribution coefficients （Ko） were 91.81 and 561.80 L/kg （10℃）〉80. 65 and 435.60 L/kg （20℃） 〉 61.49 and 306.70 L/kg （30 ℃）. The KF and Kd of activated sludge were 514.90 and 91.72 L/kg at 20 ℃. The difference between inactivaed and activated sludge was lower than 20 percent.

关 键 词：17β-雌二醇好氧污泥 吸附 吸附等温线 分配系数 

分 类 号：X703[环境科学与工程—环境工程]