Preparation of Magnetic MIL-68(Ga) Metal–Organic Framework and Heavy Metal Ion Removal Application
Youjun Zhang,
Licong Liu,
Dixiong Yu,
Jinglan Liu,
Lin Zhao,
Jinpeng Liu,
Shuo Liu
Affiliations
Youjun Zhang
School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
Licong Liu
Technical Centre of Solid Waste and Soil Ecology of Inner Mongolia, Huhehaote 010000, China
Dixiong Yu
Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, Department of Microbiology, College of Life Sciences, Nankai University, Tianjin 300071, China
Jinglan Liu
Tianjin North China Geological Exploration Bureau, Tianjin 300170, China
Lin Zhao
Tianjin North China Geological Exploration Bureau, Tianjin 300170, China
Jinpeng Liu
Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
Shuo Liu
Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, Department of Microbiology, College of Life Sciences, Nankai University, Tianjin 300071, China
A magnetic metal–organic framework nanocomposite (magnetic MIL-68(Ga)) was synthesized through a “one pot” reaction and used for heavy metal ion removal. The morphology and elemental properties of the nanocomposite were characterized by scanning electron microscopy (SEM), Fourier transform infrared (FT-IR), X-ray powder diffraction (XRD), as well as zeta potential. Moreover, the factors affecting the adsorption capacity of the nanocomposite, including time, pH, metal ion type and concentration, were studied. It was found that the adsorption capacity of magnetic MIL-68(Ga) for Pb2+ and Cu2+ was 220 and 130 mg/g, respectively. Notably, the magnetic adsorbents could be separated easily using an external magnetic field, regenerated by ethylenediaminetetraacetic acid disodium salt (EDTA-Na2) and reused three times, in favor of practical application. This study provides a reference for the rapid separation and purification of heavy metal ions from wastewater.
