Removing anionic dyes from wastewater based on in-situ formation of Fe3O4@Zn-Al layered double hydroxides by self-assembly
Removing anionic dyes from wastewater based on in-situ formation of Fe3O4@Zn-Al layered double hydroxides by self-assembly
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基于自组装原位形成Fe3O4@Zn-Al层状双氢氧化物去除废水中阴离子染料
DOI：
10.1016/j.clay.2019.01.012
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发表时间：
2019-03-15
影响因子：
5.6
通讯作者：
Zhang, Qian
中科院分区：
文献类型：
--
作者：
Meng, Zilin;Wu, Mi;Zhang, Qian
研究了一种通过自组装形成Fe3O4@Zn-Al层状双氢氧化物（ZnAl-LDH）去除废水中阴离子染料的新方法，并选择带3个负电荷的萘酚绿B （NG）作为目标污染物。在此过程中，化合物的成功合成与污染物的去除同时完成。可以完全去除废水中的NG，脱除效率达到LDH脱除能力的理论最大值。通过实验和模拟分析了ZnAl-LDH夹层中NG分子的限电去除过程和分子排列。小尺寸的Fe3O4完全覆盖在ZnAl-LDH层上，使其易于从废水中分离。
A new approach to remove anionic dyes from wastewater was developed by forming Fe3O4@Zn-Al layered double hydroxides (ZnAl-LDH) in self-assembly process and naphthol green B (NG) with three negative charges was selected as target contaminant. In this process, the successful synthesis of compound and removal of contaminant were accomplished simultaneously. NG in wastewater can be totally removed and the removal efficiency reached the theoretical maximum of LDH removal capacity. The charge-limited removal process and the molecular arrangement of NG molecules in the ZnAl-LDH interlayer were analyzed experimentally and through simulation. The Fe3O4 with small size was complete cover the layers of ZnAl-LDH making it easily separate from wastewater.