Mineralization of N-Methyl-2-Pyrrolidone by UV-Assisted Advanced Fenton Process in a Three-Phase Fluidized Bed Reactor

作者：Li, Huiyuan; Liu, Fuzhen; Zhang, Hui^*; Huang, Yao-Hui^*

来源：Clean-Soil Air Water, 2018, 46(10): 1800307.

DOI：10.1002/clen.201800307

• nitrogen-containing organic compounds
• photo-Fenton process
• total organic carbon (TOC)
• zero-valent iron (Fe-00)

N-Methyl-2-pyrrolidone (NMP), a commonly used solvent in industries, is treated with zero-valent iron (Fe-0) and hydrogen peroxide (H2O2) under UV irradiation. The reaction is carried out in a three-phase fluidized bed reactor to ensure the smooth and continuous circulation of the Fe-0 powder. The results reveal that NMP can be efficiently mineralized by UV-assisted Fe-0/H2O2 process (advanced photo-Fenton process) with aeration. The mineralization process is properly fitted with the pseudo-first order kinetics (R-2>0.93). To determine the optimum conditions for NMP mineralization, the effects of pH, Fe-0 dosage, H2O2 concentration, and initial NMP concentration are investigated. Addition of 0.05gL(-1) Fe-0 and 0.1M H2O2 yields 85.2% total organic carbon removal of NMP (10mM) in 6h at pH 4.0 +/- 0.2. To explore the changes of the nitrogen species, released NO2-, NO3-, and NH4+ are also monitored during the reaction. The present study provides an effective method for the mineralization of NMP-containing wastewater.

• 出版日期2018-10
• 单位武汉大学