Synthesis and characterization of cotton-like Ca-Al-La composite as an adsorbent for fluoride removal

被引：142

作者：

Xiang, Wei ^{[1
]}

Zhang, Gaoke ^{[1
]}

Zhang, Yalei ^{[2
]}

Tang, Dandan ^{[1
]}

Wang, Junting ^{[1
]}

机构：

[1] Wuhan Univ Technol, Sch Resources & Environm Engn, Wuhan 430070, Peoples R China

[2] Tongji Univ, State Key Lab Pollut Control & Resource Reuse, Coll Environm Sci & Engn, Shanghai 200092, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2014年 / 250卷

关键词：

Ca-Al-La composite; Fluoride; Morphology control; Adsorption isotherm; Kinetics; AQUEOUS-SOLUTIONS; ATTAPULGITE ADSORBENT; DRINKING-WATER; LOW-COST; FT-IR; ADSORPTION; SORPTION; PERFORMANCE; ALUMINA; ENVIRONMENT;

D O I：

10.1016/j.cej.2014.03.118

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Cotton-like Ca-Al-La composite as an adsorbent for fluoride removal was successfully synthesized by an easy one-step hydrothermal process. The as-prepared samples were characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The results showed that the samples have uniform and cotton-like morphology. Batch sorption experiments were conducted to study the influence of various factors such as pH, initial fluoride concentration, equilibrium contact time, co-existing anions on the sorption of fluoride. The fluoride adsorption over the Ca-Al-La composite follows the Langmuir model. The maximum adsorption capacity of the adsorbent is 29.30 mg/g. The fluoride adsorption kinetics over the adsorbent can be well described by the pseudo-second-order kinetic model. In addition, the cotton-like Ca-Al-La composite showed high fluoride removal efficiency over a wide range of pH (3-11). (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：423 / 430

页数：8

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