期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 594, 期 -, 页码 398-408出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2021.03.065
关键词
Functional material; ZIF-8@Fe/Ni; Malachite green; Removal
资金
- Talent Construction Funds of Fujian Normal University, China [Z0210509]
A ZIF-8@Fe/Ni sample was synthesized for the removal of dye-contaminated wastewater, demonstrating high efficiency in removing malachite green and exploring the adsorption and reduction mechanisms. The characterization of ZIF-8@Fe/Ni by various techniques showed its potential application value, providing a promising material for the treatment of wastewater.
Dye-contaminated wastewater resulting from rapid industrialization and urbanization is a global problem. In this study, a ZIF-8@Fe/Ni sample was synthesized for the removal of malachite green (MG), removing more than 99% of an initial MG concentration of 50 mg L-1 within 120 min with a 318 K adsorption capacity of 151.520 mg g(-1). To understand the dye removal mechanism based on adsorption and reduction, ZIF-8@Fe/Ni was characterized by various techniques. XRD showed that the ZIF-8@Fe/Ni composite had a characteristic peak attributable to Fe/Ni around 44.8 degrees, where the presence of Fe/Ni did not affect the structure of ZIF-8. SEM confirmed that ZIF-8@Fe/Ni was successfully prepared, while XRD and FTIR revealed that the structure of ZIF-8@Fe/Ni remained stable following the introduction of Fe/Ni. XPS showed that while Fe/Ni nanoparticles existed in ZIF-8-Fe/Ni, partial oxidation also occurred. GC-MS demonstrated the creation of two major MG degradation products, (4-aminophenyl) (phenyl) methanone and 4-aminophenol. While the overall adsorption process of MG to ZIF-8@Fe/Ni conformed to pseudo-second-order kinetics, degradation followed pseudo-first-order reduction kinetics. When applied to the remediation of wastewater, ZIF-8@Fe/Ni removed 92% of MG. Overall, this study demonstrated that ZIF-8@Fe/Ni could be a promising material for the treatment of wastewater. (C) 2021 Elsevier Inc. All rights reserved.
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