酸性吸附树脂对2,6-二氯苯酚的吸附热力学和动力学研究

本文以二硫代二苯甲酸、均苯四甲酸酐和没食子酸为修饰剂,通过后交联反应和化学修饰反应制备了3种酸性功能基修饰的超高交联树脂。通过等温吸附实验和吸附动力学实验,探讨了3种酸性吸附树脂对2,6-二氯苯酚(2,6-DCP)的吸附性能和吸附机制。结果表明,3种酸性吸附树脂对2,6-DCP均具有良好的吸附性能,吸附量随着2,6-DCP初始浓度的增大而增加,随着温度的升高而减小。Langmuir和Freundlich等温吸附方程均能够较好地拟合吸附等温线,3种酸性树脂对2,6-DCP的吸附机理较复杂。吸附热力学结果表明,吸附过程主要为放热、自发的物理吸附过程。3种酸性树脂对2,6-DCP的吸附动力学过程符合准一级动力学方程,颗粒内扩散是该吸附过程的主要控制步骤。3种酸性吸附树脂对2,6-DCP的吸附速率常数大小顺序为kGAMRkDSTAMRkPMDAMR。     

A Novel Coordination Polymer, [Ag_4~I (bpdc)(H_2bpdc)(Hbpdc)_2]_n (bpdc=2,2''''-bipyridyl-3,3''''-dicarboxylate): Coordination Models of bpdc Ligands

Introduction Transition metal coordination polymers of one-, twoand three-dimensional infinite frameworks have been aattractive research area because of their diverse structures and useful properties.1,2 Polydentate ligands, whicare used as bridges in constructing the coordinatiopolymers are quite important in the crystal engineerinof supramolecular architecture organized by coordinatcovalent or hydrogen bonding.3 2,2'-Bipyridyl-3,3dicarboxylate (bpdc) is a potential bridging ligand ivariou…