Adsorptive removal of Cr(VI) from wastewater by α-FeOOH hierarchical structure: kinetics, equilibrium and thermodynamics

被引：43

作者：

Wang, Yong ^{[1
]}

Ma, Ji ^{[1
]}

Chen, Kezheng ^{[1
]}

机构：

[1] Qingdao Univ Sci & Technol, Coll Mat Sci & Engn, Lab Funct & Biomed Nanomat, Qingdao 266042, Peoples R China

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2013年 / 15卷 / 44期

基金：

中国国家自然科学基金;

关键词：

FLOWERLIKE ALPHA-FE2O3 NANOSTRUCTURES; ADSORBENT; OXIDES; DYE;

D O I：

10.1039/c3cp52867g

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A novel hollow urchin-like alpha-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.

引用

页码：19415 / 19421

页数：7

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