Study On The New Iron-carbon Micro Electrolysis Preparation And Dyeing Wastewater Treatment

At present, the Micro-electrolysis technology is an ideal crafts of processing highconcentration wastewater. In order to achieve the purpose of degradation Organic pollutants,in the case of not energized, it uses Potential difference which is produced byMicro-electrolysis material that fills in the wastewater to carry out electrolytic treatment forwastewater. Traditional micro electrolysis process uses iron and charcoal asMicro-electrolysis material. You should add acid activation before using. It is easy topassivation and harden during the using.In additon, because of the physical contact of ironand carbon,it’s easy to form Isolation layer and Micro-electrolysis can’t go on conducting. Soit will lead to replace Micro-electrolysis material frequently. As the result, it leads to not onlyworkload and high cost, but also affect the effectiveness and efficiency of processing forwastewater. Moreover, Traditional micro electrolysis process has too small surface area, so itwill take more time for wastewater treatment. It add to the investment costs of Tons of waterand seriously affect the use and promotion of Micro Electrolysis Process. Accoding to thedefects of Traditional Micro-electrolysis material and the biorefractory of organic wastewater,on the basis of Traditional Micro-electrolysis material, conducted the preparation of newmicro-electrolysis material and the research of organic wastewater treatment. The researchresults are as follows:1.On the basis of Traditional Micro-electrolysis material, prepare a kind of multiplecatalytic micro-electrolysis material that multi-metal alloys fuses catalyst and use Hightemperature microporous activation technology to synthesis it. It belongs to no new dosingformula compaction micro-electrolysis material.2.By using reducing iron,powdered activated carbon and a certain amount of additive asthe basic materials, respectively study some preparation parameters, such as, Fe/C mass ratio,iron-carbon mass accounted the percentage of the total mass of micro-electrolysis materialand different calcinations temperature etc, to impact on the preparation of new iron-carbonmicro electrolysis material. According to orthogonal, determine the optimum conditions forpreparation. That is iron-carbon ratio is1:1, the percentage of iron and carbon is60%and thecalcinations temperature is1050oC. By the analysis of the material surface morphology, the material is porous framework structure, rough and porous surface and high strength.3.Methyl orange simulates wastewater treatment by using new iron-carbon microelectrolysis material. The results shows that it can removal COD_Cr, efficiently, reduce chromaand improve biodegradability. The effect is stable and lasting. At the same time, it can avoidsome phenomenons, during the operation,such as, filler, passivation and harden.4.The result that Methyl orange simulates wastewater treatment has some differentaffects, because of PH value, reaction time, micro-electrolysis material dosage. Orthogonaldetermines optimum treatment parameters, such as, aeration rate0.4L/min, reaction time2h,influent PH4and the material dosage0.15kg/L. COD_Cris above87％and color removal isabove98％. And the material has higher reuse.5.The study shows that the material adds into organic wastewater. In the processingequipment, there will be numerous micro-cell systems. In its interaction space, there will beforming an electric field. During the process, they can take place redox reaction with manyingredients in wastewater. They can destroy chromophoric group or auxochrome group ofcolored substances in colored wastewater and even chain scission to achieve decolorizing.Fe²⁺further oxidates Fe³⁺.Their hydtate has stronger adscrption-flocculation activity. Fe²⁺addsalkali to adjust PH to generate Fe（OH）₂and Fe³⁺adds alkali to adjust PH to generateFe（OH）₃colloid flocculant. Their absorption capacity is much higher than Fe（OH）₃colloidthat is generated by general medicine hydrolysis. They can adsorb dispersed fine particles,metallic particles and organic macromolecules. Iron-carbon micro electrolysis method isbetter than direct flocculation method. It shows that electrochemical reaction plays a leadingrole for the removal rate of chroma and COD_Crin the process of micro electrolysis.