Copper oxide-catalyzed reduction of N-nitrosodimethylamine with zero-valent iron in water
HAN Ying1, WANG Ji-he1, LI Jun2, LI Wei-wei1, JIANG Bei-bei1, YAO Jie1
1. College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, China;
2. College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
To remove the environmental pollution of N-nitrosodimethylamine (NDMA), copper oxide (CuO) was utilized to catalyze the NDMA reduction with zero-valent iron. The reaction efficiency, the influences of the CuO dosage, pH value, dissolved oxygen concentration and rotation speed were investigated. The products were analyzed and the kinetic laws and reaction mechanism were also discussed. The results indicated that CuO could effectively catalyze the reduction of NDMA with zero-valent iron. The removal efficiency could be greater than 99% after 18h. The reaction proceeded faster with higher dosage of CuO and lower pH value. Oxygen-enriched state inhibited the reduction of NDMA. The reaction will be affected when the reactor speed was too fast or too slow.1,1-dimethylhydrazine (UDMH) and dimethylamine (DMA) formed with the degradation of NDMA. Catalytic hydrogenation was proposed as the mechanism.
韩莹, 王济禾, 李军, 李微微, 蒋贝贝, 姚杰. 氧化铜催化零价铁还原水中亚硝基二甲胺[J]. 中国环境科学, 2017, 37(6): 2100-2105.
HAN Ying, WANG Ji-he, LI Jun, LI Wei-wei, JIANG Bei-bei, YAO Jie. Copper oxide-catalyzed reduction of N-nitrosodimethylamine with zero-valent iron in water. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(6): 2100-2105.
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