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Highly Efficient Adsorption and Reduction of Cr(VI) Ions by a Core–Shell Fe3O4@[email protected] Composite
The Journal of Physical Chemistry A ( IF 2.7 ) Pub Date : 2020-03-31 , DOI: 10.1021/acs.jpca.0c00269 Lincheng Li 1 , Yunlan Xu 1 , Dengjie Zhong 1
The Journal of Physical Chemistry A ( IF 2.7 ) Pub Date : 2020-03-31 , DOI: 10.1021/acs.jpca.0c00269 Lincheng Li 1 , Yunlan Xu 1 , Dengjie Zhong 1
Affiliation
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Herein, we reported a simple solvothermal and chemical oxidation method to synthesize a magnetic core–shell composite (Fe3O4@[email protected]) for Cr(VI) removal from wastewater. Due to the porosity and stability of UiO-66 and stability, high acid resistance, and multiple active (reducing and chelating) groups of polyaniline (PANI), Fe3O4@[email protected] exhibited excellent efficiency, regeneration, and reusability performance for Cr(VI) removal. Its maximum adsorption capacity and removal rate were 474.42 mg·g–1 and 99.90%, respectively. The effects of initial pH values, contact time, and initial Cr(VI) concentration on Cr(VI) removal were investigated. The fitted data showed that the adsorption process was consistent with the pseudo-second-order kinetic model and Langmuir isothermal model. The study of the mechanism shows that the excellent efficiency of Fe3O4@[email protected] is due to the electrostatic adsorption and reduction of Cr(VI) and the chelation of Cr3+. The results demonstrate that Fe3O4@[email protected] is a promising adsorbent for the Cr(VI) removal.
中文翻译：
核壳型Fe 3 O 4 @ [受电子邮件保护]复合材料对Cr（VI）离子的高效吸附和还原
在这里，我们报道了一种简单的溶剂热和化学氧化方法，用于合成磁性核-壳复合材料（Fe 3 O 4 @ [受电子邮件保护]）以去除废水中的Cr（VI）。由于UiO-66的孔隙率和稳定性以及聚苯胺（PANI）的稳定性，高耐酸性和多个活性（还原和螯合）基团，Fe 3 O 4 @ [受电子邮件保护]表现出优异的效率，再生和可重复使用性能用于去除Cr（VI）。最大吸附量和去除率为474.42 mg·g –1和99.90％。研究了初始pH值，接触时间和初始Cr（VI）浓度对Cr（VI）去除的影响。拟合数据表明吸附过程与拟二级动力学模型和Langmuir等温模型一致。对机理的研究表明，Fe 3 O 4 @ [e-protected]的优异效率归因于Cr（VI）的静电吸附和还原以及Cr 3+的螯合。结果表明，Fe 3 O 4 @ [电子邮件保护]是一种有希望的吸附剂，用于去除Cr（VI）。
更新日期：2020-03-31
中文翻译：
核壳型Fe 3 O 4 @ [受电子邮件保护]复合材料对Cr（VI）离子的高效吸附和还原
在这里，我们报道了一种简单的溶剂热和化学氧化方法，用于合成磁性核-壳复合材料（Fe 3 O 4 @ [受电子邮件保护]）以去除废水中的Cr（VI）。由于UiO-66的孔隙率和稳定性以及聚苯胺（PANI）的稳定性，高耐酸性和多个活性（还原和螯合）基团，Fe 3 O 4 @ [受电子邮件保护]表现出优异的效率，再生和可重复使用性能用于去除Cr（VI）。最大吸附量和去除率为474.42 mg·g –1和99.90％。研究了初始pH值，接触时间和初始Cr（VI）浓度对Cr（VI）去除的影响。拟合数据表明吸附过程与拟二级动力学模型和Langmuir等温模型一致。对机理的研究表明，Fe 3 O 4 @ [e-protected]的优异效率归因于Cr（VI）的静电吸附和还原以及Cr 3+的螯合。结果表明，Fe 3 O 4 @ [电子邮件保护]是一种有希望的吸附剂，用于去除Cr（VI）。
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