In order to explore the solubility of chemical cleaning agent EDTA on simulated deposit Fe3O4 and steam generator sludge,and to guide the selection of chemical cleaning processes,XRF and ICP-OES were used to analyze the dissolution effects of solution temperature,EDTA concentration,and dissolution time on simulated deposit Fe3O4 and SG sludge.The chemically modified electrode was prepared by Fe3O4,and the cyclic voltammetry test and AC impedance test of the modified electrode were carried out by using a three-electrode system.The results indicate that the higher the solution temperature,the higher the EDTA concentration,and the stronger the solubility of Fe3O4.The longer the dissolution time,the higher the dissolution rate of Fe3O4 and SG sludge.Due to the differences between SG sludge and Fe3O4,EDTA solution has a weaker ability to dissolve SG sludge than Fe3O4.The electrochemical reaction process of Fe3O4 modified electrode in EDTA solution is diffusion-controlled process.
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