Phosphate removal ability of biochar/MgAl-LDH ultra-fine composites prepared by liquid-phase deposition

被引：283
作者：
Zhang, Ming [1 ]
Gao, Bin [1 ]
Yao, Ying [1 ]
Inyang, Mandu [1 ]
机构：
[1] Univ Florida, Dept Agr & Biol Engn, Gainesville, FL 32611 USA
来源：
CHEMOSPHERE | 2013年 / 92卷 / 08期
基金：
美国国家科学基金会;
关键词：
Biochar; Layered double hydroxide; Ultra-fine composites; Liquid-phase deposition; Adsorption; Phosphate; LAYERED DOUBLE HYDROXIDES; HAZARDOUS ELEMENTS; AQUEOUS-SOLUTION; HEAVY-METALS; ADSORPTION; WATER; NANOCOMPOSITES; MINERALS; CHARCOAL; SORPTION;
D O I：
10.1016/j.chemosphere.2013.02.050
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Morphological structures and adsorption properties of biochar/MgAl-LDH ultra-fine composites prepared by liquid-phase deposition have been determined in laboratory. X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray analysis (EDS), and Fourier transform infrared (FTIR) were used to characterize the biochar based ultra-composites. The XRD and FTIR data indicated that the biochar/MgAl-LDHs ultra-fine composites can successfully be obtained by liquid-phase deposition. The SEM images showed the dispersion of colloidal and nanosized LDH flakes on the carbon surfaces within the biochar matrix. The thickness and size of single LDH platelet are 20-40 nm and 100-300 nm. Batch sorption experiments were also conducted and the results indicated that the biochar/MgAl-LDHs ultra-fine composites is an effective sorbent for the removal of phosphate from aqueous solutions. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1042 / 1047
页数：6
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