The Study Of High Iron Sodium Preparation By Electrolytic Method And Its Application In Wastewater Treatment

Ferrate Fe (Ⅵ) is a versatile and efficient water treatment agent, with oxidation,adsorption, flocculation, coagulation, anti-virus and deodorization effect, especiallyrelative to the chlorine bactericide is concerned, does not produce harmful substances,is an ideal alternative to chlorine fungicide products.Since the18th century, Ferrate Fe (Ⅵ) has been found, after several generationsof the study, and ultimately the laboratory synthesis, but not for industrial production,therefore, its study did not stop, but increasingly more become a research hotspot. Inthe preparation method of Ferrate Fe (Ⅵ), electrolysis is more efficient.Because ofthe good systematic of equipment、less raw material consumption、and flexible.Theelectrolysis is more fit for preparation and dosing process.But there are somedisadvantages of electrolysis severely restricted its industrial production and practicalapplication.Therefore, this paper aims to find a devices and processes what can achievethe Industrial production of the preparation of Ferrate Fe (Ⅵ), to address theconstraints of industrial production,that the low average current efficiency withlong time electrolysis.Also through the experiment, study how to use the sodiumferrate in the wastewater treatment.Through the study of prepared by electrolysis of sodium iron principle、processand the test analysis of influencing factors (including alkali type and concentration,temperature, current density, electrolysis time, add stabilizer, plus iron source and ultrasound), this study identified the preparation of Sodium ferrate: the upper andlower electrode instead of the traditional left-style-type electrode, the anode to0.5r/srotation,2cm away from the cathode surface,4cm from the bottom anode, stirring:Current4.5mA/cm~2; NaOH concentration of14mol/L; temperature55℃,1Helectrolysis, in a case of mixing, direct electrolysis Maximum current efficiency(58%). In addition, according to the experiments on additive, the final selection issodium iodide, sodium iodide, sodium silicate, in accordance with the ratio of1:2:1tothe electrolyte, the total additive concentration of about4mmol/L, test The resultsshow that the apparent current efficiency, and reduce the current efficiency curve withtime slowing down.In addition, this paper studies the current efficiency o f the way of electrolyticpreparation of sodium ferrate which appends some kinds of iron compound andUltrasonic. Through research, plus Iron nitrate, and the stainless steel as a fillermaterial, which can effectively improve the current efficiency during electrolysis, andsodium ferrate concentration in solution? Experiments show that under certainconditions, the ultrasound is propitious to electrode oxidation. And improve thecurrent efficiency. In this reactor and electrolysis conditions, the current efficiencycan be improved more than20%.Through the use of sodium ferrate in made several simulations of wastewatertreatment, experiments show that in wastewater treatment, the main factors whateffects sodium ferrate removal of pollutants is dosage, pH, mixing, etc. In theexperiment, removal of pollutants through a variety of factors analysis andoptimization, and ultimately to achieve certain results. Sodium ferrate dyeing reactivedyes and disperse wastewater color removal rate of up to80%or more, a nd theremoval of phenol wastewater91%,and the removal of the heavy metals lead,cadmium, copper and zinc removal vary, and the best removal of cadmium,88%.This paper raised new ways to effectively improve the current efficiency by thestudy of electrolysis of sodium iron electrolysis process; thereby increasing theconcentration of Sodium ferrate reduces production cost. Through the treatment ofsimulated wastewater, the application of Sodium ferrate study and discuss the waysome of its applications in wastewater has made significant progress.