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氯丁橡胶生产废水中含有氯丁二烯等大量有机物,其可生化性差且难以处理。为了寻找合理可行、效果较好的废水处理方法,采用电解法对废水进行处理,研究了加入Fe/Al双金属对电解法处理废水的作用,并考察了不同阴极材料、溶液初始pH和电解时间对废水COD去除率的影响以及对机理进行了分析。结果表明,加入Fe/Al双金属能够协助电解法对废水中的有机物进行降解,达到提高废水COD去除率和处理效率的作用。在铁电极为阴极、电流密度为0.5 A/cm-2、溶液初始pH=7.0、电解时间为60 min的较优条件下,Fe/Al双金属协助电解法处理废水的COD去除率为77.7%。废水处理过程中,有机物在阳极被逐级氧化分解成CO2、H2O等低分子物质和少量中间产物,其中的-Cl等基团在阴极和Fe/Al双金属表面被还原降解脱除。
Neoprene production wastewater contains a large number of chloroprene and other organic matter, its poor biodegradability and difficult to handle. In order to find a reasonable and feasible method of wastewater treatment, the electrolysis method was used to treat the wastewater. The effect of adding Fe / Al bimetal on electrolysis was studied. The effects of different cathode materials, solution initial pH and electrolysis time The impact of wastewater COD removal rate and the mechanism were analyzed. The results show that the addition of Fe / Al bimetal can help electrolysis of organic matter in wastewater degradation, to improve the COD removal efficiency of wastewater and the role of treatment efficiency. Under the optimum condition of ferroelectrode cathode, current density of 0.5 A / cm-2, initial pH of solution = 7.0 and electrolysis time of 60 min, the COD removal efficiency of wastewater treatment by Fe / Al bimetallic electrolysis was 77.7% . In the process of wastewater treatment, the organic compounds are oxidized step by step at the anode into low molecular substances such as CO2, H2O and a small amount of intermediate products, in which the groups of -Cl and the like are reduced and removed on the cathode and the Fe / Al bimetallic surface.