TY - GEN
T1 - Hydrogen peroxide-based wet oxidation to eliminate contraceptive hormone residues from pharmaceutical wastewater
AU - Sirinukulwatana, Patnaree
AU - Kunpunya, Prapaporn
AU - Supanivatin, Pattarin
AU - Foster, Kenneth W.
AU - Thipayarat, Aluck
N1 - Funding Information:
This work was financially supported by a Research Grant from Burapha University through National Research Council of Thailand (Grant No. 126/2559 and 114/2560).
PY - 2017
Y1 - 2017
N2 - Wet oxidation using hydrogen peroxide (1, 3, and 5% H2O2) at raised temperatures has been used to oxidize pharmaceutical wastewater derived from contraceptive pill production. Model wastewater containing ethinyl estradiol (40 μg/ml), levonorgestrel (25 μg/ml), cyproterone (25 μg/ml), gestodene (10 μg/ml), and desogestrel (50 μg/ml) was formulated based on the average concentration of hormones measured in the first wash of an equipment cleaning process. Higher temperatures for wet oxidation ranging from 100 to 150°C were anticipated to enhance the oxidizing capability of this hydroxyl-radical-mediated advanced oxidation. At mild oxidation treatments (1% H2O2 at 100°C), only sensitive species showed minor degradation by HPLC chromatogram. Desogestrel was easily removed even with this mild oxidizing, but the other hormones were more stable. Fortunately, higher temperatures generated much higher hormone degradation rates. For instance, 5% H2O2 at 150°C destroyed all the hormones in the model wastewater within 5 min. We assume highly reactive hydroxyl radicals produced the rapid mineralization of the spiked hormones.
AB - Wet oxidation using hydrogen peroxide (1, 3, and 5% H2O2) at raised temperatures has been used to oxidize pharmaceutical wastewater derived from contraceptive pill production. Model wastewater containing ethinyl estradiol (40 μg/ml), levonorgestrel (25 μg/ml), cyproterone (25 μg/ml), gestodene (10 μg/ml), and desogestrel (50 μg/ml) was formulated based on the average concentration of hormones measured in the first wash of an equipment cleaning process. Higher temperatures for wet oxidation ranging from 100 to 150°C were anticipated to enhance the oxidizing capability of this hydroxyl-radical-mediated advanced oxidation. At mild oxidation treatments (1% H2O2 at 100°C), only sensitive species showed minor degradation by HPLC chromatogram. Desogestrel was easily removed even with this mild oxidizing, but the other hormones were more stable. Fortunately, higher temperatures generated much higher hormone degradation rates. For instance, 5% H2O2 at 150°C destroyed all the hormones in the model wastewater within 5 min. We assume highly reactive hydroxyl radicals produced the rapid mineralization of the spiked hormones.
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U2 - 10.1061/9780784480632.012
DO - 10.1061/9780784480632.012
M3 - Conference contribution
AN - SCOPUS:85021436270
T3 - World Environmental and Water Resources Congress 2017: Water, Wastewater, and Stormwater; Urban Watershed Management; and Municipal Water Infrastructure - Selected Papers from the World Environmental and Water Resources Congress 2017
SP - 167
EP - 178
BT - World Environmental and Water Resources Congress 2017
A2 - Van Weele, Brian
A2 - Dunn, Christopher N.
PB - American Society of Civil Engineers (ASCE)
T2 - 17th World Environmental and Water Resources Congress 2017
Y2 - 21 May 2017 through 25 May 2017
ER -