One-pot fabrication of ferric ferrocyanide functionalized graphene hydrogel for cesium removal in aqueous solution
One-pot fabrication of ferric ferrocyanide functionalized graphene hydrogel for cesium removal in aqueous solution
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一锅法制备亚铁氰化铁功能化石墨烯水凝胶用于水溶液中除铯
DOI：
10.1039/c7ra07530h
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发表时间：
2017-09
期刊：
影响因子：
3.9
通讯作者：
Zhang Dong
中科院分区：
文献类型：
--
作者：
He Yan Rong;Yang Yang;Huang Zhao Ya;Wang Wei Juan;Li Xiao Long;Zhang Peng Hao;Tan Zhao Yi;Zhang Dong
核工业的快速发展为全球经济发展带来了好处，解决了能源危机。然而，核工业活动产生大量的放射性废水，对环境安全和人体健康构成严重威胁，而137 Cs被认为是放射性废水中含量最丰富的放射性核素之一。在这项研究中，我们制备了一种新型的亚铁氰化铁（普鲁士蓝，PB）功能化的石墨烯水凝胶（PB/rGOH）的Cs（I）去除。所制备的PB/rGOH显示出三维网络，PB纳米颗粒均匀分布在rGO片的表面上。PB/rGOH可以容易地从水溶液中分离。此外，复合材料的体积可以收缩为小的刚性散装材料，进一步减少废物的体积。动力学实验表明，Cs（I）在PB/rGOH上的吸附符合准二级动力学模型，吸附平衡数据符合Langmuir模型。根据Langmuir模型计算，pH 5.0时的最大吸附容量为58.82 mg g−1。pH值从3增加到7可以提高吸附容量，但进一步增加pH值会导致PB纳米粒子严重分解。综上所述，本研究制备的PB/rGOH对水溶液中Cs（I）的去除效果良好，在放射性废水处理中具有良好的应用前景。
The rapid development of the nuclear industry brings benefits for global economic development and solves the energy crisis. However, nuclear industrial activities produce a large amount of radioactive wastewater, which poses serious threats to environmental safety and human health, and 137Cs is considered one of the most abundant radionuclides in radioactive wastewater. In this study, we fabricated a new type of ferric ferrocyanide (Prussian blue, PB) functionalized graphene hydrogel (PB/rGOH) for Cs(I) removal. The as-prepared PB/rGOH shows a three dimensional network with PB nanoparticles uniformly distributed on the surface of the rGO sheets. The PB/rGOH could be readily separated from aqueous solution. Moreover, the volume of the composite could shrink to a small stiff bulk material, further reducing the volume of the waste. Kinetics experiments showed that Cs(I) adsorption on PB/rGOH fitted well with pseudo-second-order kinetic model, and the equilibrium data agreed well with the Langmuir model. As calculated from the Langmuir model, the maximum adsorption capacity at pH 5.0 is 58.82 mg g−1. The increase of pH from 3 to 7 could enhance the adsorption capacity, however, further increasing the pH value resulted in serious decomposition of PB nanoparticles. In conclusion, the PB/rGOH prepared in our work showed good performance on removal of Cs(I) in aqueous solution, and has a good application prospect in radioactive waste water treatment.
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纤维素纳米纤维回封的普鲁士蓝色纳米颗粒是有力消除放射性剖宫产的强大吸附剂。
影响因子：
4.6
作者：
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通讯作者：
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影响因子：
1.5
作者：
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通讯作者：
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影响因子：
4.1
作者：
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通讯作者：
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影响因子：
11.4
作者：
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通讯作者：
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影响因子：
9.9
作者：
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通讯作者：
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