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首页> 外文期刊>Environmental Science and Pollution Research >Application of Box-Behnken design and desirability function in the optimization of Cd(II) removal from aqueous solution using poly(o-phenylenediamine)/hydrous zirconium oxide composite: equilibrium modeling, kinetic and thermodynamic studies
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Application of Box-Behnken design and desirability function in the optimization of Cd(II) removal from aqueous solution using poly(o-phenylenediamine)/hydrous zirconium oxide composite: equilibrium modeling, kinetic and thermodynamic studies

机译：用聚（邻苯二胺）/含水锆氧化锆复合材料从水溶液中去除CD（II）的优化中的应用：平衡建模，动力学和热力学研究

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摘要

In this research work, poly(o-phenylenediamine) was incorporated into the hydrous zirconium oxide matrix to form poly(o-phenylenediamine)/hydrous zirconium oxide composite which is used for the removal of Cd(II) from aqueous solution. The characterization of the material was done based on FTIR, XRD, SEM, and TGA-DTA. The effects of contact time, pH, adsorbent dose, and initial concentration of Cd(II) on the removal of Cd(II) were studied by performing 29 sets of sorption runs using Box-Behnken design combined with response surface methodology (RSM). Various isotherm models were tested to describe the adsorption equilibrium. The adsorption equilibrium data fitted well with Freundlich isotherm model. The maximum adsorption capacity of 66.66mgg(-1) was obtained from Langmuir isotherm. The pseudo-second-order kinetic model described the adsorption kinetics more accurately. Diffusion-based kinetics such as intraparticle diffusion and Bangham's model suggested that both film and intraparticle pore diffusion were involved in the adsorption process. The Elovich model pointed towards the chemisorption. The investigation of desorption and regeneration suggested that the material can be used as an effective sorbent for removal of Cd(II) from aqueous system.
机译：在该研究工作中，将聚（O-苯二胺）掺入含水锆氧化物基质中以形成聚（O-苯二胺）/含水锆氧化物复合材料，其用于从水溶液中除去CD（II）。基于FTIR，XRD，SEM和TGA-DTA进行材料的表征。通过使用Box Behnken设计与响应表面方法（RSM）结合使用29套吸附，研究了接触时间，pH，吸附剂剂量和CD（II）的去除去除CD（II）的初始浓度。测试各种等温线模型以描述吸附平衡。吸附平衡数据与Freundlich等温线模型很好。从Langmuir等温线获得66.66mgg（-1）的最大吸附容量。伪二阶动力学模型更准确地描述了吸附动力学。基于扩散的动力学，如麦克星座扩散和Bangham的模型表明，薄膜和椎间内孔隙扩散都参与了吸附过程。 Elovich模型指出了化学吸附。解吸和再生的研究表明，该材料可用作从水性体系中除去CD（II）的有效吸附剂。

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