Magnetic MnFe2O4/ZnFe-LDH for Enhanced Phosphate and Cr (VI) Removal from Water

被引：0
作者：
Congxin Huang
Chaochun Tang
Qingqing Wu
Qing Zhu
机构：
[1] East China Jiao Tong University,School of Civil Engineering and Architecture
[2] Tongji University,Continuing Education College
来源：
Environmental Science and Pollution Research | 2022年 / 29卷
关键词：
Layered double hydroxides; Magnetic separation; Adsorption; Phosphate and Cr (VI) pollutants;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Due to the layered structure and recycling characteristics, magnetic MnFe2O4/ZnFe-LDH was prepared by co-precipitation. In this study, we intensively explored MnFe2O4/ZnFe-LDH for water purification compared with the ZnFe-LDH. The morphological and structural characteristics of the obtained products were systematically characterized. MnFe2O4/ZnFe-LDH exhibits the maximum adsorption capacity of 94.52 mg/g for phosphate and 49.03 mg/g for Cr (VI), respectively, which is superior to that of the ZnFe-LDH, indicating that the magnetic MnFe2O4 effectively enhanced adsorption performance. Meanwhile, the mechanism of adsorption of phosphate and Cr (VI) was briefly studied, where the metal center ion in MnFe2O4/ZnFe-LDH and between layers of SO42− serves as capture sites for phosphate and Cr (VI) removal. Furthermore, the MnFe2O4/ZnFe-LDH can be used for magnetic recycled and still maintained excellent removal efficiency (70%) for phosphate and Cr (VI) after five adsorption–desorption cycles. This work could open a new vista of designing magnetic novel adsorbents in environmental remediation.
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页码：59224 / 59234
页数：10
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