1. Highly efficient removal of dye pollutants by MIL-101(Fe) metal-organic framework loaded magnetic particles mediated by Poly L-Dopa
- Author
-
Asma Hamedi, Mahmood Borhani Zarandi, and Mohammad Reza Nateghi
- Subjects
Materials science ,Process Chemistry and Technology ,Langmuir adsorption model ,02 engineering and technology ,010501 environmental sciences ,021001 nanoscience & nanotechnology ,01 natural sciences ,Pollution ,chemistry.chemical_compound ,symbols.namesake ,Adsorption ,chemistry ,Ionic strength ,Methyl red ,symbols ,Chemical Engineering (miscellaneous) ,Magnetic nanoparticles ,Metal-organic framework ,Malachite green ,0210 nano-technology ,Thermal analysis ,Waste Management and Disposal ,0105 earth and related environmental sciences ,Nuclear chemistry - Abstract
A magnetic metal-organic framework (MOF) composite, MIL-101(Fe)@PDopa@Fe3O4, was synthesized as the stable adsorbent for removal of methyl red (MR) and malachite green (MG) from wastewaters. A very thin film of 3,4-dihydroxy-L-phenylalanine (L-Dopa) was used as an efficient and environmentally friendly binder between Fe3O4 particles and MIL-101(Fe). Characterization of MIL-101(Fe)@PDopa@Fe3O4 was accomplished by various spectroscopic, microscopic and thermal analysis techniques. Magnetic properties of the composite were studied by vibrating sample magnetometer (VSM). Influencing factors such as pH, ionic strength, contact time, adsorbent dosage, temperature, and initial dye concentration on the adsorption ability of the MIL-101(Fe)@PDopa@Fe3O4 were investigated. The very excellent adsorption capacities (833.33 and 1250 mg/g for MG and MR, respectively) were achieved. Adsorption kinetics, thermodynamics and isotherms studies indicated that MG and MR adsorption followed Langmuir isotherm model and pseudo second-order kinetic model. The Adsorbent was successfully used to remove industrial colors from real textile wastewater. The MIL-101(Fe)@ PDopa@Fe3O4 was found to be recyclable for removal of MR and MG.
- Published
- 2019