Enhanced removal of oxytetracycline from wastewater using bimetallic Fe/Ni nanoparticles combined with ZIF-8 nanocomposites

被引：37

作者：

Jin, Xiaoying ^{[1
]}

Li, Heng ^{[1
]}

Zhu, Xiuduan ^{[2
]}

Li, Na ^{[1
]}

Owens, Gary ^{[3
]}

Chen, Zuliang ^{[1
,4
]}

机构：

[1] Fujian Normal Univ, Sch Environm Sci & Engn, Fujian Key Lab Pollut Control & Resource Reuse, Fuzhou 350007, Fujian Province, Peoples R China

[2] Nanping Water & Soil Conservat Ctr, Nanping 353000, Fujian Province, Peoples R China

[3] Univ South Australian, Future Ind Inst, Environm Contaminants Grp, Mawson Lakes, SA 5095, Australia

[4] Fujian Normal Univ, Sch Environm Sci & Engn, Fuzhou 350007, Fujian Province, Peoples R China

来源：

JOURNAL OF ENVIRONMENTAL MANAGEMENT | 2022年 / 318卷

关键词：

Adsorption; Antibiotic; Bimetallic nanoparticles; Hybrid; Reduction; ZIF-8; ZERO-VALENT IRON; METAL-ORGANIC FRAMEWORK; EFFICIENT REMOVAL; ADSORPTION; DEGRADATION; TETRACYCLINE; ANTIBIOTICS; PERFORMANCE; AMPICILLIN; PARTICLES;

D O I：

10.1016/j.jenvman.2022.115526

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The integration of metal-organic frameworks with other functional materials has recently emerged as a promising approach for creating innovative materials for environmental remediation. Here, a nano-sized iron/nickel (Fe/Ni) functionalized zeolitic imidazolate framework-8 (ZIF-8-Fe/Ni) was fabricated for oxytetracycline (OTC) removal from wastewater. Cyclic voltammetry and amperometric I-t measurements indicated that OTC was degraded by ZIF-8-Fe/Ni. X-ray diffraction spectroscopy (XRD), transmission electron microscopy mapping (TEM-mapping) and X-ray photoelectron spectroscopy (XPS) indicated that Fe/Ni was evenly dispersed throughout ZIF-8 and partially oxidized after reaction with OTC. OTC adsorption isotherms and kinetics best fitted the Langmuir isotherm (R2 > 0.982) and pseudo-second-order model (R-2 > 0.997), respectively. Reduction kinetics data followed the pseudo-first-order model (R-2 > 0.905), where the apparent activation energy (Ea) was 22.9 kJ mol(-1), demonstrating that OTC degradation was mainly via a chemical process. The practical removal efficiency of OTC from real wastewater by ZIF-8-Fe/Ni was 92.6%, where even after application of ZIF-8-Fe/Ni for 5 consecutive removal cycles, a high OTC removal of 74.9% was maintained. Thus ZIF-8-Fe/Ni exhibited both high removal efficiency and good recyclability.

引用

页数：10

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