中文摘要：

采用二乙烯三胺（DETA）改性聚多巴胺（PDA）包覆硅胶（SG）得到吸附NSG@DETA／PDA。通过FTIR、SEM和氮气吸附一脱附等技术对SG@DETA／PDA进行了形貌和结构表征，并考察了其对阴离子染料日落黄的吸附性能。表征结果显示，SG@DETA／PDA表面有PDA微球团聚形成的较为致密的包覆层，其比表面积和孔体积均比吸附剂SG@PDA有小幅提高。实验结果表明：SG@DETA／PDA吸附H落黄的最佳工艺条件为溶液pH2．0、吸附时间2．0h、初始染料质量浓度150mg／L，在上述最佳工艺条件及298K温度条件下SG@DETA／PDA对日落黄的吸附容量为175．56mg／g。SG@DETA／PDA吸附日落黄的过程可以分别用准二级动力学方程和Langmuir等温吸附方程很好地拟合，该吸附过程主要是通过静电作用的单分子层吸附，是一个吸热自发的熵增过程。

英文摘要：

SG@DETA/PDA was prepared by modifying polydopamine （PDA） coated silica gel （SG） with diethylenetriamine （DETA）. The morphology and structure of SG@DETA/PDA were characterized by FTIR, SEM and N2 adsorption- desorption isotherms measttrement.The adsorption effects of sunset yellow （SY） on SG@DETA/PDA were investigated. The characteristic results showed that a relatively dense coating layer consisting of agglomerate PDA microspheres were formed on the surface of SG@DETA/PDA, whose specific surface area and pore volume were a little higher than those of SG@PDA. The experimental results indicated that under the optimum conditions for SY adsorption on SG@DETA/PDA of solution pH 2.0, adsorption time 2.0 h, initial dye mass concentration 150 mg/L, adsorption temperature 298 K, the adsorption capacity of SG@DETA/PDA to SY was 175.56 mg/g. The adsorption process fitted the pseudo-second-order kinetics equation and Langmuir adsorption isotherm equation well. This adsorption process was a monolayer adsorption by means of electrostatic interaction, and was also an endothermic, spontaneous and entropy increment process.