生物膜载体吸附剂对Zn^(2+)的吸附  

ADSORPTION OF ZINC(II) ON BIOFILM CARRIER SORBENT

作　　者：姜斌[1] 黄欣[1] 李鑫钢[1] 张敬[1] 孙津生[1] 

机构地区：[1]天津大学化工学院

出　　处：《水处理技术》2006年第7期12-15,共4页Technology of Water Treatment

基　　金：国家自然科学基金资助项目(B061101)

摘　　要：本文对生物膜吸附Zn2+的行为进行了准一级动力学方程和Elovich模型方程的拟合,对实验测定的吸附等温线用Langmuir与Freundlich吸附模型进行拟合;考察了pH值及温度对生物膜吸附Zn2+的影响。结果表明,Zn2+在生物膜载体吸附剂上的吸附动力学过程与Elovich方程有较好的拟合度,R2=0.99994。单一等温吸附过程与Langmuir方程具有较好的拟合度,R2=0.99785;pH=6～8,室温25℃对Zn2+有较高的去除率。The adsorption of heavy metal ions by biofilm carrier is a novel promising wastewater treatment. In the research.the behavior of biofilm adsorbing Zn^2＋ was fit with the pseudo-first-order kinetic equation and Elovich model, meanwhile the adsorption isotherm was fit with Langmuir and Freundlich model. The influence ofpH value and temperature on biofilm adsorbing Zn^2＋ was studied in the experiment. The results showed that the Zn^2＋ adsorption dynamic process on the adsorbent and Elovich equation had better fitness,R^2=-0.99994, and single isotherm adsorption process and Langmuir equation had better fitness R^2=0.99785 ）. The adsorptive rate ofZn^2＋ could be high when temperature was at 25℃ and pH value within 6-8.

关 键 词：生物膜 废水 重金属离子 ZN^2+ 吸附动力学 

分 类 号：O647.33[理学—物理化学] TS255.5[理学—化学]