Superior capability of MgAl₂O₄ for selenite removal from contaminated groundwater during its reconstruction of layered double hydroxides

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• 作者：Na Tian ; Zhaoxin Zhou ; ^{zhaoxinzhou@cug.edu.cn} ; Xike Tian ; ^{xktian@cug.edu.cn} ; Chao Yang ; Yong Li
• 关键词：Mg/Al LDHs ; Spinel MgAl2O4 ; Reconstruction ; Selenite adsorption ; Mechanism
• 刊名：Separation and Purification Technology
• 出版年：2017
• 出版时间：4 April 2017
• 年：2017
• 卷：176
• 期：Complete
• 页码：66-72
• 全文大小：2505 K
• 卷排序：176

文摘

Selenite is an inorganic pollutant in groundwater, affecting human health. cLDHs with increased porosity and mesoporous structure, exhibit the excellent selenite removal performance. High affinity and adsorption capacity of cLDHs were performed, and the maximum adsorption capacity of selenite was 179.59 mg/g. Pseudo-second-order and Langmuir models well described kinetic and isotherm data. The adsorbent could be used circularly 4 times efficiently. Final removal of selenite ions is by reassembling and reconstructing to hydrotalcites structures.