High-Efficiency Adsorption of Cr(VI) and Mn(VII) from Wastewater by a Two-Dimensional Copper-Based Metal–Organic Framework

Abstract

Cr(VI) and Mn(VII) in industrial wastewater have certain toxicity, and they pose a threat to the environment and human health and safety. Metal−organic frameworks (MOFs) usually have rich adsorption sites and a large specific surface area. They can effectively adsorb Cr(VI) and Mn(VII) from wastewater. In this paper, a two-dimensional copper-based metal−organic framework, is synthesized by hydrothermal synthesis. The structure of 1 is characterized by Fourier transform infrared (IR) spectroscopy, single-crystal X-ray diffraction, element analysis, and X-ray photoelectron spectroscopy (XPS). The results showed that 1 had a two-dimensional network structure, and the specific surface area of the nanostructure was 67.63 m 2 /g. The nanostructure of 1 could efficiently adsorb Cr(VI) and Mn(VII) from wastewater. The adsorption properties of Cr(VI) and Mn (VII) of 1 showed that the optimal concentration of both adsorbents was 0.2 g/L. It has good adsorption performance in the pH range 4−8. The adsorption performance is the best when pH is 7, which can reach 145 and 83 mg/g, respectively.

Performance and Mechanism of the Modified Group Regulated the MIL-101(Fe) Type Fenton-like Catalysts

“…Compared with traditional porous materials, MOFs have a higher specific surface area, larger porosity, and diverse and adjustable structures . They are widely used in catalysis, − sensing, adsorption, − and other fields. − MIL-101(Fe) and its derivatives are novel porous materials in MOFs. ,− They are constructed through organic ligands such as Fe(III) and terephthalic acid and have advantages such as large specific surface area, high porosity, and good thermal and chemical stability. They have been studied in the removal of organic pollutants through adsorption, photocatalytic degradation, and Fenton-like catalysis .…”