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Fenton法处理DMF废水及无机阴离子对反应的影响
邬莎娜,孙贤波,刘勇弟,顾雍,陈强,陈颖
0
(华东理工大学资源与环境工程学院, 国家环境保护化工过程 环境风险评价与控制重点实验室, 上海 200237)
摘要:
N,N-二甲基甲酰胺(DMF)作为一种万能溶剂在工业中被广泛应用,但它有毒性、难以生物降解。本文采用Fenton法处理DMF模拟废水,考察了pH、反应时间、氧化剂投加量等条件对处理效果的影响,同时探讨了Cl-和SO42-对反应的影响。研究结果表明:处理1 g/L的DMF模拟废水,最佳反应条件为:w=30% H2O2的投加量为40 mL/L,pH=2.0,n(H2O2):n(Fe2+)=3:1,反应时间2.5 h,在该条件下出水化学需氧量(COD)小于100 mg/L;Cl-对Fenton法处理DMF废水有着十分强的抑制作用,1 g/L就会使出水COD由90 mg/L上升到250 mg/L;而SO42-对Fenton反应的处理效果影响很小,当ρSO42->10 g/L时有一定的促进作用。
关键词:  DMF废水  Fenton氧化法  无机阴离子
DOI:10.14135/j.cnki.1006-3080.2017.01.012
投稿时间:2016-04-27
基金项目:
Fenton Oxidation of DMF Wastewater and Influence of Inorganic Ions on Reaction
WU Sha-na,SUN Xian-bo,LIU Yong-di,GU Yong,CHEN Qiang,CHEN Ying
(School of Resource and Environmental Engineering, State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China)
Abstract:
N,N-Dimethylformamide (DMF) is a universal organic solvent in industry,while it is toxic and non-biodegradable.In this paper,Fenton oxidation was used to treat model DMF wastewater and the influence of pH,reaction time,dose of oxidation agent,as well as the effect of inorganic anions Cl- and SO42- were investigated.The experimental results showed that the optimum conditions with effluent COD<100 mg/L were as follows:when the concentration of DMF was 1 g/L,the dosage of 30% H2O2 was 40 mL/L,pH=2.0,n(H2O2):n(Fe2+)=3:1,reacting time is 2.5 h.Meanwhile,Cl- had a strong inhibition effect on Fenton oxidation:the COD of effluent increased from 90 mg/L to 250 mg/L with 1 g/L Cl-.The effect of SO42- on the reaction was very small:with a concentration higher than 10 g/L,it could accelerate the reaction to some extent.
Key words:  DMF wastewater  Fenton oxidation  inorganic ions

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