Synthesis of Magnetic Expanded Graphite and Its Application to Remove Cr(VI) From Wastewater

被引：9
|
作者：
Qi, Gang [1 ]
Zhang, Wenguo [1 ,2 ]
Dai, Yong [1 ]
机构：
[1] Yancheng Inst Technol, Coll Chem & Biol Engn, Yancheng 224051, Peoples R China
[2] Nanjing Univ Technol, Coll Chem & Chem Engn, Nanjing, Jiangsu, Peoples R China
来源：
SYNTHESIS AND REACTIVITY IN INORGANIC METAL-ORGANIC AND NANO-METAL CHEMISTRY | 2014年 / 44卷 / 01期
关键词：
adsorption; chromium; magnetic expanded graphite; sol-gel method; wastewater treatment; HEAVY-METAL IONS; AQUEOUS-SOLUTIONS; ADSORPTION; GAMMA-FE2O3; CHROMIUM(VI); RECOVERY;
D O I：
10.1080/15533174.2013.807288
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
In this work, nanoscale maghemite (-Fe2O3) supported by expanded graphite (EG) and magnetic expanded graphite (MEG) was synthesized by a sol-gel method. The composite material was characterized by scanning electron microscope (SEM), transmission electron microscopy (TEM), powder X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The results of characterization suggested that the particle size of -Fe2O3 was about 50nm, the -Fe2O3 and EG were coordinated by carbon-oxygen bond. MEG as a novel adsorbent for the removal and recovery of Cr(VI) from wastewater, the effects of adsorbents, time, and pH on Cr(VI) removal were investigated. Moreover the regeneration and adsorption isotherm of the adsorbent were also studied. The experimental results indicated that the novel adsorbent presented the fast, convenient, and high-efficiency removal and recovery of Cr(VI) from contaminated water.
引用
收藏
页码：153 / 160
页数：8
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