Fe-FeS2 adsorbent prepared with iron powder and pyrite by facile ball milling and its application for arsenic removal

被引：72
|
作者：
Min, Xiaobo [1 ,2 ]
Li, Yangwenjun [1 ]
Ke, Yong [2 ,3 ]
Shi, Meiqing [1 ,2 ]
Chai, Liyuan [1 ,2 ]
Xue, Ke [1 ]
机构：
[1] Cent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China
[2] Chinese Natl Engn Res Ctr Control & Treatment Hea, Changsha 410083, Hunan, Peoples R China
[3] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China
来源：
WATER SCIENCE AND TECHNOLOGY | 2017年 / 76卷 / 01期
关键词：
arsenic removal; ball milling; Fe-FeS2; adsorbent; iron; pyrite; BINARY OXIDE ADSORBENT; POTENTIAL RISK; HEAVY-METALS; IRON NZVI; ADSORPTION; NANOPARTICLES; REDUCTION; PARTICLES; KINETICS; SORPTION;
D O I：
10.2166/wst.2017.204
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Arsenic is one of the major pollutants and a worldwide concern because of its toxicity and chronic effects on human health. An adsorbent of Fe-FeS2 mixture for effective arsenic removal was successfully prepared by mechanical ball milling. The products before and after arsenic adsorption were characterized with scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy. The adsorbent shows high arsenic removal efficiency when molar ratio of iron to pyrite is 5:5. The experimental data of As(III) adsorption are fitted well with the Langmuir isotherm model with a maximal adsorption capacity of 101.123 mg/g. And As(V) data were described perfectly by the Freundlich model with a maximal adsorption capacity of 58.341 L/mg. As(III) is partial oxidized to As(V) during the adsorption process. High arsenic uptake capability and cost-effectiveness of waste make it potentially attractive for arsenic removal.
引用
收藏
页码：192 / 200
页数：9
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