Synthesis, identification and application of metal organic framework for removal of industrial cationic dyes

One form of metal organic frameworks (MOFs) that has been zeolitic imidazolate framework-7 (ZIF-7) is synthesized and characterized and detailed analysis adsorption behavior with Methylene Blue (MB) and Brilliant Green (BG) dyes. Impact of various variables on the method of batch as a solution pH function, MB and BG concentration, ZIF-7 dose, contact time and BG concentration, contact time and the temperature was analyzed and optimal test conditions were identified. Electron microscopy (SEM) has become a common tool for morphology characterization of materials such as ZIF-7. The pores in the substance ZIF-7 have a BET surface area of 94.19 m(2)g(-1) and an average pore size of 2.79 nm, indicating that they are mesoporous. The average pore size of BJH is 1.4477 nm, which is ideal for adsorption. The zero charge (pH(PZC)) point of ZIF-7 was computed at 7.5. The adsorption kinetics showed that the action in the pseudo-second processes was adopted by adsorption: order kinetic model and chemisorbing. The parameters of thermodynamics, such as Delta G, Delta S and Delta H, have been specified. The study of adsorption thermodynamics indicated that the reaction was spontaneous and endothermal. The AC electrical conductivity was investigated, with the overlapping large-polaron tunneling (OLPT) model as the operative conduction mechanism. (C) 2021 Elsevier B.V. All rights reserved.