[논문]Emerging investigators series: prediction of trace organic contaminant abatement with UV/H2O2: development and validation of semi-empirical models for municipal wastewater effluents

Gerrity, Daniel; Lee, Yunho; Gamage, Sujanie; Lee, Minju; Pisarenko, Aleksey N.; Trenholm, Rebecca A.; von Gunten, Urs; Snyder, Shane A.

doi:10.1039/c6ew00051g

Emerging investigators series: prediction of trace organic contaminant abatement with UV/H2O2: development and validation of semi-empirical models for municipal wastewater effluents

Environmental science : water research & technology, v.2 no.3, 2016년, pp.460 - 473

Gerrity, Daniel (Department of Civil and Environmental Engineering and Construction) , Lee, Yunho (School of Environmental Science and Engineering) , Gamage, Sujanie (Applied Research and Development Center) , Lee, Minju (Eawag) , Pisarenko, Aleksey N. (Trussell Technologies, Inc.) , Trenholm, Rebecca A. (Applied Research and Development Center) , von Gunten, Urs (Eawag) , Snyder, Shane A. (Department of Chemical and Environmental Engineering)

Abstract ▼ AI-Helper

Recent evaluations of potable reuse treatment trains suggest that the use of UV and UV/H2O2may become increasingly common, particularly in systems employing ozone and/or biofiltration. This study provides a summary of photolysis rate constants and ˙OH rate constants and demonstrates the applicability of semi-empirical relationships predicting ˙OH exposure and trace organic contaminant (TOrC) abatement with UV/H2O2in matrices with low UV transmittance (e.g., <80%). The data are based on bench-scale experiments with 17 target compounds in 10 laboratory-filtered secondary wastewater effluents. As an alternative to ˙OH exposure measurements with probe compounds, three different approaches for considering the impacts of matrix-specific ˙OH scavenging on TOrC abatement are proposed: (1) estimation ofR˙OH,UV(i.e., ˙OH exposure per UV dose); (2) estimation ofkUV/DOC, the pseudo first order rate constant based on the UV/DOC (dissolved organic carbon) ratio; and (3) assessment of TOrC abatement based on differential UV254absorbance or fluorescence. The level of laboratory investment varies with each approach, but there is a tradeoff in the accuracy of the predictions and whether they typically overestimate or underestimate actual TOrC abatement.

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DOI : 10.1039/C6EW00051G
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