摘要
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 wastewater was characterized with a large amount of organics （chloroprene, ere）, bad biodegradation, and was difficult to treat. In order to find a reasonable and better neoprene wastewater treatment method, the wastewater was treated by electrolytic method and the impact by the adding ofFe/Al bimetallic particles to wastewater treatment was studied. The effects of factors affecting the COD removal, such as cathode material, initial pH value, and electrolytic time were examined and the mechanism of the wastewater treatment was analysed. The results indicated that the treatment of neoprene wastewater by electrolytic method can be assisted with the adding of Fe/A1 bimetallic particles to achieve effect of higher COD removal and treatment efficiency. Under the better experimental conditions of iron electrode as cathode, current density for 0.5 A/cm2, initial pH for neutral and electrolytic time for 60 min, the removal rate of COD was 77.7%. The organic matters in neoprene wastewater can be broken down gradually into low molecular-weight substances（CO2, H2O etc） and a small amount of intermediates by electrolytic anodica oxidation, the groups（--Cl, etc） in the organic matters can be removed by catalytic action of cathodic reduction and Fe/A1 bimetallic particles.
出处
《水处理技术》
CAS
CSCD
北大核心
2013年第10期59-63,共5页
Technology of Water Treatment
基金
国家自然科学基金项目(51274261)
重庆市教委科技项目(KJ08A13)
关键词
氯丁橡胶生产废水
电解法
FE
Al双金属
废水处理
neoprene wastewater
electrolytic method
Fe/Al bimetallic particles, wastewater treatment
