蒙脱石/DOM复合体对菲的吸附  

Sorption of phenanthrene on a montmorillonite /DOM (dissolved organic matter) complex

作　　者：李涛[1] 吴平霄[1] 陈秋强[1] 

机构地区：[1]华南理工大学环境科学与工程学院,工业聚集区污染控制与生态修复教育部重点实验室,广州510006

出　　处：《环境科学学报》2010年第2期383-389,共7页Acta Scientiae Circumstantiae

基　　金：国家自然科学基金项目(No.40973075,40573064);教育部新世纪优秀人才支持计划(No.NCET-06-0747);广东省科技计划项目(No.2006B36601004,2008B030302036);广东省自然科学基金项目(No.06025666)~~

摘　　要：以垃圾渗滤液为水溶性有机质(DOM)提取原料,通过与吸附载体蒙脱石的有机-无机复合制得蒙脱石/DOM复合体,研究其对菲的吸附作用以及温度、pH值、固液比等不同因素对吸附过程的影响.结果表明,相比蒙脱石原土,蒙脱石/DOM复合体对菲的吸附能力得到显著提高;随着温度升高吸附量呈下降趋势;介质pH值对吸附影响不大;随着固液比的增大,平均吸附量逐渐减小,吸附率逐渐增大.动力学研究表明,菲在蒙脱石/DOM复合体上的吸附等温线与Henry线性方程和Freundlich经验方程的线性拟合较好.另外,对菲在蒙脱石/DOM复合体上的解吸实验表明,菲在蒙脱石/DOM复合体上的吸附有较好的稳定性.An organic-mineral complex of montmorillonite and dissolved organic matter （DOM） was synthesized using trash infiltration fluid as the raw material to extract DOM.The sorption behavior of phenanthrene on the montmorillonite/DOM complex was investigated by varying parameters including temperature,pH,and solid-liquid ratio.The results indicated that the sorption capacity of the montmorillonite/DOM complex for phenanthrene increased dramatically compared with that of pristine montmorillonite;the sorption quantity decreased with increasing temperature,but was barely influenced by pH;the equilibrium sorption capacities decreased,while the sorption efficiencies increased with increasing solid/liquid ratio.In addition,the kinetic data of phenanthrene sorption by the montmorillonite/DOM complex were fit well by the Henry equation and the Freundlich equation.Moreover,desorption experiments of phenanthrene on the montmorillonite/DOM complex demonstrated that phenanthrene has good sorption stability on the complex.

关 键 词：吸附 水溶性有机物 蒙脱石 复合体 菲 

分 类 号：X131[环境科学与工程—环境科学]