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Use copper coated iron - centrifugal extraction machine H2O2 treatment of phenol wastewater

by:Deyuan      2020-08-20
Is a serious hazard of industrial wastewater containing phenol wastewater, it is mainly derived from the destructive distillation of wood, plastic, dye, pesticide, resin, casting, paper, paint, synthetic ammonia plant in industries such as the emission of a large number of wastewater, the influence on feed water, aquatic organisms are serious. Must be on the generation of wastewater containing phenol and, therefore, has the industrial waste water containing phenol take effective treatment measures, strict control of emissions.
so far, researchers have proposed many effective treatment methods, including activated carbon adsorption, biological method, chemical method and so on, but there are cycle is short, the regeneration difficulty, high operation cost, etc. Which Fenton method is the use of Fe2 + and H2O2, a series of the refractory organic produce hydroxyl free radical chain reaction process of a kind of advanced oxidation process, has the advantages of simple, fast, and can produce flocculation, but there are still the oxidant H2O2 utilization rate is low, the oxidation efficiency and high processing cost. Therefore, iron corrosion cell method is widely research and application in recent years, it is also called the electrolytic process, is the iron filings and activated carbon galvanic cell, using the pollutants react on is negative, and enrichment of galvanic cell's own electricity, physical adsorption and flocculation role to achieve the purpose of decontamination.
copper coated iron liquid - H2O2 treatment of phenol wastewater processing step
the method does not consume energy, low processing cost, and the use of scrap iron mostly come from industrial waste, was treated with practical significance. On this basis, in accordance with the principle of primary battery, this research try to use copper coated iron instead of FeSO4 to degradation of phenol in Fenton system simulation wastewater, and to investigate the influence of relevant factors on the COD removal rate and the actual effect of treatment of wastewater containing phenol.
the first iron with hot water for 5 min in removing oil, sodium carbonate solution water flushing to nearly neutral, add a small amount of dilute sulphuric acid activation 3 min, then wash to nearly neutral. Then, to join in after the pretreatment of iron, copper sulfate solution mixing reaction after 2 min, has been in iron plating a thin layer of metal copper on the surface, the wash and the suction filter, air dry.

the treatment of wastewater containing phenol experiment of waste water are added into the beaker 50 mL, in a certain amount of copper coated iron filings, add a certain amount of H2O2 under stirring, H2O2 after all, continue to stir, reaction after 5 min, stop stirring, let stand for a certain time, centrifugal filter, CODCr value take supernatant fluid.
the first iron with hot water for 5 min in removing oil, sodium carbonate solution water flushing to nearly neutral, add a small amount of dilute sulphuric acid activation 3 min, then wash to nearly neutral. Then, to join in after the pretreatment of iron, copper sulfate solution mixing reaction after 2 min, has been in iron plating a thin layer of metal copper on the surface, the wash and the suction filter, air dry.
centrifugal extraction machine using copper coated iron liquid - The effect of hydrogen peroxide treatment of phenol wastewater
( 1) Using copper coated iron filings - H2O2 treatment of phenol wastewater, the optimal operating conditions for: 30% H2O2 12 mL/L, copper coated iron 5 g/L, the pH value of 4 ~ 6, 45 min temperature response, COD removal rate can reach 96% after reaction. Under the best conditions and deal with the actual printing and dyeing wastewater containing phenol, the CODCr from 5827 mg/L to 419 mg/L, chroma from 2000 to 30, meet the national discharge standard.
( 2) Through contrast experiment found that copper coated iron can not only provide the necessary response Fe2 +, and copper coating of Fenton reaction with a certain role in promoting, show that the copper coated iron filings as catalyst is an effective method of treatment of wastewater containing phenol.
references:
1] Chang-feng liu, gui-ping liu, yong-sheng liu. The application of the immobilization technology in phenol wastewater treatment research progress [ J] 。 Chemical engineers, 2005, 11 ( 42) : 38 - 39:.
( 2] Zhang Fang, lee bright, hui-kang, etc. Electric catalytic oxidation technology in the application of phenol wastewater treatment [ J] 。 Progress in chemical industry, 2005, 24 ( 8) : 860 - 864.
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