AOP Treatment of Nitrosamines in Recycled Water
Hydrogen peroxide (peroxide) alone provided no removal of NDMA, NDEA, or NDPA. UV alone removed all three compounds, and increasing electrical energy doses (EEDs) increased removal. At all tested UV EEDs, NDMA removal was greater than NDEA removal, which was greater than NDPA removal. The addition of peroxide to UV treatment had no effect on NDMA removal, but increased NDEA and NDPA removal. Treatment goals of 1.2-log NDMA removal and effluent concentrations of 10 ng/L NDMA were achieved by UV alone. The treatment goal of 10 ng/L NDPA could be achieved by UV alone, or by reducing the EED and adding hydrogen peroxide. A combination of hydrogen peroxide and UV was required to reduce NDEA effluent concentrations below the target of 10 ng/L.
Keywords: AOP; N-nitrosodiethylamine; N-nitrosodimethylamine; N-nitrosodipropylamine; NDEA; NDMA; NDPA UF; RO; UV; advanced oxidation process; hydrogen peroxide; microconstituents; nitrosamines; pilot experiments
Document Type: Research Article
Publication date: 01 January 2011
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