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首页> 外文期刊>Desalination and water treatment >Optimization, kinetic, equilibrium and thermodynamics parameters for Congo red adsorption from aqueous phase by untreated chicken feathers
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Optimization, kinetic, equilibrium and thermodynamics parameters for Congo red adsorption from aqueous phase by untreated chicken feathers

机译：未经处理的鸡毛从水相中吸附刚果红的优化，动力学，平衡和热力学参数

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The study of the adsorption of Congo red dye, a diazo carcinogenic compound, onto untreated chicken feathers was conducted in batch conditions. The optimization of the adsorption was evaluated using a Box-Behnken experimental design with three independent variables. It was observed that the best adsorption conditions were at pH 5, 30 degrees C and using a semi-ground size of chicken feathers. The Langmuir, Freundlich, Temkin and Dubinin-Radushkevich models were used to analyze the experimental data, the adsorption equilibrium was well described by the Temkin isotherm adsorption model and the maximum adsorption capacity of chicken feathers obtained by the Langmuir model was 97.8 mg g(-1) at 30 degrees C. The results of the thermodynamic parameters showed the spontaneous nature, the feasibility of adsorption and the exothermic process due to the negative Gibbs energy value and the enthalpy value. FT-IR analysis confirmed the adsorption of Congo red on chicken feathers, showing that carboxyl and amino protonated groups from adsorbent were involved in the adsorption process.
机译：在未处理的鸡毛上分批进行了刚果重染料（重氮致癌化合物）的吸附研究。使用具有三个独立变量的Box-Behnken实验设计评估吸附的最优化。观察到最佳的吸附条件是在pH 5、30摄氏度和使用半地面尺寸的鸡毛。用Langmuir，Freundlich，Temkin和Dubinin-Radushkevich模型分析实验数据，通过Temkin等温吸附模型很好地描述了吸附平衡，通过Langmuir模型获得的鸡毛最大吸附能力为97.8 mg g（- 1）在30摄氏度下。热力学参数的结果显示，由于吉布斯能量值和焓值均为负值，因此具有自发性，吸附的可行性和放热过程。 FT-IR分析证实刚果红在鸡毛上的吸附，表明吸附剂中的羧基和氨基质子化基团参与了吸附过程。

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