中文摘要：

为了解经十二烷基硫酸钠（SDS）改性的钙铝LDH作为吸附剂吸附水体中硝基苯和萘的吸附性能，结合有机钙铝LDH的结构特征和有机质含量，对有机改性前后钙铝LDH分别对硝基苯、萘的动力学和等温吸附线进行了研究。探讨了其吸附机理。结果表明，有机钙铝LDH层间距为3．25nm，有机质含量约为45％。提出了有机改性后的钙铝LDH对硝基苯和萘的吸附率增强，且萘的吸附效率高于硝基苯；有机钙铝LDH对非离子型有机污染物的吸附作用机理主要为分配作用。

英文摘要：

In order to understand the adsorption mechanism of SDS modified CaAl-LDH to nitrobenzene and naphthalene from water,the absorption behavior of organo-LDH from water was discussed by investigating the ad- sorption kinetics and adsorption isotherms. The as-prepared SDS modified LDHs displayed an interlayer distance of 3.25 nm and a 45% organic carbon content. Both the experimental and modeled data indicated that the re- moval efficiency of organic pollutions from water were improved with the use of SDS modified CaAl-LDH. Moreo- ver, the removal efficiency of naphthalene was higher than that of nitrobenzene due to its hydrophobicity. The mechanisms of organo-LDH adsorption of organic oollutions were revealed to he Partition contributions.