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Mineralization of N ‐Methyl‐2‐Pyrrolidone by UV‐Assisted Advanced Fenton Process in a Three‐Phase Fluidized Bed Reactor
Author(s) -
Li Huiyuan,
Liu Fuzhen,
Zhang Hui,
Huang YaoHui
Publication year - 2018
Publication title -
clean – soil, air, water
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 66
eISSN - 1863-0669
pISSN - 1863-0650
DOI - 10.1002/clen.201800307
Subject(s) - mineralization (soil science) , hydrogen peroxide , chemistry , fluidized bed , aeration , kinetics , nuclear chemistry , nitrogen , ferrous , organic chemistry , physics , quantum mechanics
N ‐Methyl‐2‐pyrrolidone (NMP), a commonly used solvent in industries, is treated with zero‐valent iron (Fe 0 ) and hydrogen peroxide (H 2 O 2 ) 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 /H 2 O 2 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, H 2 O 2 concentration, and initial NMP concentration are investigated. Addition of 0.05 g L −1 Fe 0 and 0.1 M H 2 O 2 yields 85.2% total organic carbon removal of NMP (10 mM) in 6 h at pH 4.0 ± 0.2. To explore the changes of the nitrogen species, released NO 2 − , NO 3 − , and NH 4 + are also monitored during the reaction. The present study provides an effective method for the mineralization of NMP‐containing wastewater.