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

IF 4.4 2区心理学 Q1 PSYCHOLOGY, DEVELOPMENTAL

Human Development Pub Date : 2022-08-01 Epub Date: 2022-04-05 DOI:10.1007/s11356-022-20049-9

Congxin Huang, Chaochun Tang, Qingqing Wu, Qing Zhu

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Abstract

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 SO₄^2- 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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磁性 MnFe2O4/ZnFe-LDH 用于增强水中磷酸盐和六价铬的去除。

由于磁性 MnFe2O4/ZnFe-LDH 具有分层结构和循环特性，我们采用共沉淀法制备了磁性 MnFe2O4/ZnFe-LDH。与 ZnFe-LDH 相比，本研究深入探讨了 MnFe2O4/ZnFe-LDH 在水净化中的应用。对所获产物的形态和结构特征进行了系统表征。MnFe2O4/ZnFe-LDH对磷酸盐和六价铬的最大吸附量分别为94.52 mg/g和49.03 mg/g，均优于ZnFe-LDH，表明磁性MnFe2O4有效地提高了吸附性能。同时，对磷酸盐和六价铬的吸附机理进行了简要研究，发现 MnFe2O4/ZnFe-LDH 中和 SO42- 层间的金属中心离子是去除磷酸盐和六价铬的捕获位点。此外，MnFe2O4/ZnFe-LDH 可用于磁性回收，在经过五次吸附-解吸循环后，对磷酸盐和六（七）铬仍能保持极佳的去除率（70%）。这项研究为设计新型磁性吸附剂用于环境修复开辟了新的前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Human Development PSYCHOLOGY, DEVELOPMENTAL-

CiteScore

6.20

自引率

0.00%

发文量

期刊介绍： Distinguished by its international recognition since 1958, "Human Development" publishes in-depth conceptual articles, commentaries, and essay book reviews that advance our understanding of developmental phenomena. Contributions serve to raise theoretical issues, flesh out interesting and potentially powerful ideas, and differentiate key constructs. Contributions are welcomed from varied disciplines, including anthropology, biology, education, history, philosophy, psychology, and sociology.