N-Methyl-2-pyrrolidone (NMP), one of the chemicals included in Contaminant Candidate List 3 (CCL 3) of US EPA, is extensively used as stripper in optoelectronic industry in Taiwan. In this study, a novel aeration reactor which was 7 cm in diameter and 40 cm in height was used to mineralize NMP in the batch reaction. The experimental parameters included peroxydisulfate  concentration, initial pH and anion effects. The experimental results showed that 150 mM peroxydisulfate  irradiated by 254 nm UV could remove 96% of total organic carbon (TOCr) from 10 mM NMP solution (600 ppm TOC) in 6 h. Despite the effects of anions on NMP mineralizaion rate, the introduction of air in 1 sL/mim could substantially improve the mineralization efficiency of NMP as only 60 mM peroxydisulafte  was used, achieving 99% TOCr in 4 h. The UV/peroxydisulfate/air process has also been approved to totally mineralize NMP real wastewater in 6 h.

Mineralization of N-Methyl-2-Pyrrolidone (NMP) in synthetic and real wastewater by UV/peroxydisulfate/air advanced oxidation process

248th National Meeting (2014)

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