Methylene blue adsorption by using copper pyrophosphate

Abstract

             This project aimed to study a preparation and characterization of copper pyrophosphate (Cu₂P₂O₇) that was prepared using the solid combustion method in order to study adsorption of methylene blue. The copper pyrophosphate was prepared from mixture of cupric carbonate (CuCO₃×Cu(OH)₂) and di-ammonium hydrogen phosphate ((NH₄)₂HPO₄) and calcined at 550 ^OC for 3 hrs. Then, it was characterized by thermogravimetric analysis (TGA), X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM). After that, methylene blue was adsorped by Cu₂P₂O₇ showed that it was a monolayer adsorption and the data conformed well to the Langmuir isotherm model.