Treatment Of Neoprene Wastewater By Fe/Al Bimetallic Particles Assisted Electrolytic Method

Neoprene wastewater was a kind of typical chlorinated organic wastewater whichwas characterized with a large amount of chlorinated organic matters（chloroprene, etc）,poor biodegradation, high toxicity and it was difficult to treat. The chlorinated organicmatters were harmful and refractory which was the main reason why neoprenewastewater was difficult to treat. The human health and zoology environment wereseriously imperiled by the chlorinated organic matters and the neoprene wastewater hadbeen an obligatory duty to treat. At present, the main routs to treat the chlorinatedorganic wastewater include the physical method, biodegradation technology andchemical redox methods, but the investigation for a reasonable and efficient process todeal with the chlorinated organic wastewater was of important meaning and still underway. In recent years, the treatment of chlorinated organic wastewater by electrolyticmethod has been widely used because of it’s better effect, but it was seldom reported onthe treatment of neoprene wastewater by electrolytic method.The neoprene wastewater was treated by electrolytic method, in order to find abetter effect method, the research on the impact by the adding of Fe/Al bimetallicparticles to the treatment of neoprene wastewater by electrolytic method was studied,the corrosion reaction speed and catalytic activity of Fe/Al bimetallic particles can beimproved under the electric field to accelerate the degradation of the organic matters inneoprene wastewater, meanwhile the operation process was simple. The Fe/Albimetallic particles can be coupled with electrolytic method, the treatment of neoprenewastewater by electrolytic method can be assisted with the adding of Fe/Al bimetallicparticles, it provided a new wastewater treatment method and new way.The main works included that the effect of treatment of neoprene wastewater byelectrolytic method was studied, the treatment of neoprene wastewater by Fe/Albimetallic particles assisted electrolytic method was explored, the treatment effect wasoptimized by the use of pulsed electric field and the mechanism on the treatment ofneoprene wastewater was explored.The results indicated that the treatment of neoprene wastewater by electrolyticmethod can be assisted with the adding of Fe/Al bimetallic particles to achieve effect ofhigher COD removal and treatment efficiency, under the experimental conditions of ironelectrode as cathode, current density for0.5A·cm^-2, dosage of Fe/Al bimetallic particleswas reduced iron powder2g/L and aluminite powder1g/L, initial pH for neutral, electrolytic time for60min and using the pulsed electric field （pulse parameters wasTon5ms, Toff1ms, forward working time60ms and reverse working time12ms）, thetreatment of neoprene wastewater can get better effects by Fe/Al bimetallic particlesassisted electrolytic method, the removal rate of COD was83.5%, the removal rate ofCOD increased12.9%compared with the wastewater treatment by electrolytic methodusing direct current field only, the power consumption per unit COD removal ofneoprene wastewater treatment was47.1kW·h/kg, it was decreased about30%. Themechanism was that the organic matters in the neoprene wastewater can be brokendown gradually into low molecular–weight substances（CO₂, H₂O etc） and a smallamount of intermediates by electrolytic anodic oxidation and the groups（–Cl, etc） in theorganic matters can be removed by catalytic action of cathodic reduction and Fe/Albimetallic particles. The treatment of neoprene wastewater by Fe/Al bimetallic particlesassisted electrolytic method was a new wastewater treatment methode and providedgood condition for subsequent biological treatment.