太湖沉积物再悬浮对双酚A吸附性能的影响  

Effect of sediment resuspension on BPA adsorption in Taihu Lake

作　　者：王鹏[1,2] 李琼琼[2] 蔡赟杰 

机构地区：[1]河海大学浅水湖泊综合治理与资源开发教育部重点实验室,江苏南京210098 [2]河海大学环境学院,江苏南京210098 [3]无锡国联环保能源集团有限公司,江苏无锡214000

出　　处：《水资源保护》2015年第5期35-41,共7页Water Resources Protection

基　　金：国家水体污染控制与治理科技重大专项(2014ZX07101-011);"青蓝工程"资助项目

摘　　要：利用PES(particle entrainment simulator)模拟装置,率定PES装置产生的切应力与水浴恒温振荡器转速之间的经验关系,采用批量平衡法测定了不同水动力条件下沉积物对双酚A的吸附解吸作用及吸附动力学行为。结果表明,双酚A在沉积物上的平衡吸附量不随切应力的改变而改变,其吸附行为可用Freundlich模型来描述。吸附以快速吸附为主,吸附量占总吸附量的90%以上,慢速吸附对总的吸附进程的贡献很小。切应力主要在快速吸附阶段发挥作用,快速吸附阶段的平均吸附速率与切应力呈正相关,切应力对慢速吸附阶段的影响很小。准二级吸附动力学方程能够很好地拟合不同切应力条件下双酚A在沉积物上的吸附动力学曲线。The empirical relationship between shear stress simulated by PES（ particle entrainment simulator） and rotating speed of thermostatic water bath oscillators was established and validated by experiment. Batch equilibrium experiments were performed to assess adsorption and sorption kinetics characteristics of BPA by sediment at different hydrodynamic conditions. The results indicated that the maximum sorption amount of BPA was not affected by shear stresses. The BPA adsorption process can be expected to better fit for the Freundlich isotherm model. The adsorption process was mainly fast adsorption,which account for 90%. Slow sorption ＇s contribution was very small. Shear stresses only played an important role in fast adsorption,its average adsorption rate was positive related with shear stresses. The adsorption kinetic curve can be fitted by the pseudo-second order model.

关 键 词：沉积物再悬浮 双酚A 吸附解吸作用 切应力 准二级动力学模型 

分 类 号：X52[环境科学与工程—环境工程]