通过简易球磨法用铁粉和黄铁矿制备的Fe-FeS吸附剂及其在除砷中的应用。
Fe-FeS adsorbent prepared with iron powder and pyrite by facile ball milling and its application for arsenic removal.
作者信息
Min Xiaobo, Li Yangwenjun, Ke Yong, Shi Meiqing, Chai Liyuan, Xue Ke
机构信息
School of Metallurgy and Environment, Central South University, Changsha 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China E-mail:
School of Metallurgy and Environment, Central South University, Changsha 410083, China.
出版信息
Water Sci Technol. 2017 Jul;76(1-2):192-200. doi: 10.2166/wst.2017.204.
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-FeS 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.
砷是主要污染物之一，因其毒性及对人类健康的慢性影响而受到全球关注。通过机械球磨成功制备了一种用于有效去除砷的铁 - 硫化亚铁混合物吸附剂。采用扫描电子显微镜、X射线衍射、傅里叶变换红外光谱和X射线光电子能谱对砷吸附前后的产物进行了表征。当铁与黄铁矿的摩尔比为5:5时，该吸附剂表现出高砷去除效率。As(III)吸附的实验数据与Langmuir等温线模型拟合良好，最大吸附容量为101.123 mg/g。而As(V)的数据用Freundlich模型完美描述，最大吸附容量为58.341 L/mg。在吸附过程中，As(III)部分氧化为As(V)。该吸附剂对砷的高吸附能力以及废物的成本效益使其在砷去除方面具有潜在吸引力。
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