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首页> 外文期刊>Physical chemistry chemical physics: PCCP >Adsorptive removal of Cr(VI) from wastewater by α-FeOOH hierarchical structure: kinetics, equilibrium and thermodynamics
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Adsorptive removal of Cr(VI) from wastewater by α-FeOOH hierarchical structure: kinetics, equilibrium and thermodynamics

机译：α-FeO​​OH层次结构吸附去除废水中的Cr（VI）：动力学，平衡和热力学

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摘要

A novel hollow urchin-like α-FeOOH hierarchical structure was fabricated via a one-pot hydrothermal procedure without using any templates, surfactants or organic raw materials. An inside-out amorphous ripening mechanism was proposed to unravel its structural evolution. The kinetics, equilibrium and thermodynamics of its adsorptive removal of Cr(VI) from wastewater were comprehensively investigated. It was found that the adsorption process can be depicted using a pseudo-second-order model, and a high adsorption capacity of 58.97 mg g~(-1) was obtained from the equilibrium adsorption isotherm. Also, the thermodynamic parameters (i.e., enthalpy, entropy and Gibbs free energy) at different temperatures were acquired to reveal a spontaneous adsorption process, with both physical and chemical characteristics.
机译：通过一锅水热程序，无需使用任何模板，表面活性剂或有机原料，即可制得新颖的空心顽童状α-FeO​​OH分层结构。提出了一种由内而外的无定形成熟机制，以阐明其结构演变。全面研究了从废水中吸附去除六价铬的动力学，平衡和热力学。结果表明，吸附过程可以用拟二阶模型描述，平衡吸附等温线的吸附容量为58.97 mg g〜（-1）。而且，获得了在不同温度下的热力学参数（即，焓，熵和吉布斯自由能）以揭示具有物理和化学特性的自发吸附过程。

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