Adsorption of Methylene Blue by CuFe2O4 Prepared from Precipitation Flotation Sludge

The adsorption materials can be prepared from the heavy metal ions flotation sludge in the metal-containing wastewater. When the flotation sludge was pyrolyzed in the air at 800 degrees C for 4.0 h as a self-template, cubic copper ferrite (CuFe2O4) particle was prepared and tested as an adsorption material for the adsorption performance of the material. Structural analysis of the CuFe(2)O(4 )particle was performed using scanning electron microscope (SEM), Brunauere-Emmette-Teller (BET), X-ray diffraction (XRD), and thermogravimetric analysis (TGA) techniques. According to the measurement results, the specific surface area of copper ferrite was 10.58 m(2)/g. The adsorption process of this material for the organic dye methylene blue (MB) conformed to the Freundlich isotherm adsorption model and Dubinin-Radushkevitch (D-R) isotherm adsorption models, and it was a multilayer physical adsorption process, which was proven to be an adsorbent with good adsorption performance. The sludge including heavy metal ions was effectively enriched by precipitation flotation, and the recovered sludge is pyrolyzed to form an adsorbent material, thereby achieving the effective utilization of heavy metal resources.