TY - JOUR
T1 - Oxidation of geosmin and 2-methylisoborneol by the photo-Fenton process
T2 - Kinetics, degradation intermediates, and the removal of microcystin-LR and trihalomethane from Nak-Dong River water, South Korea
AU - Park, Jeong Ann
AU - Nam, Hye Lim
AU - Choi, Jae Woo
AU - Ha, Junsoo
AU - Lee, Sang Hyup
N1 - Funding Information:
This work was supported by the National Research Foundation of Korea (NRF), with Grants funded by the Korea government (MEST) and the National Research Foundation of Korea Grant funded by the Korean Government (MSIP) (NRF-2014M3C8A4034282 and 2016 University-Institute cooperation program).
Publisher Copyright:
© 2016 Elsevier B.V.
Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2017
Y1 - 2017
N2 - Due to the increased intensity and frequency of cyanobacterial blooms, taste and odor (T&O) causing compounds, geosmin (GSM) and 2-methylisoborneol (MIB), have become a cause for great concern in drinking water treatment plants (DWTPs). Advanced oxidation processes (AOPs) have been studied for the removal of GSM and MIB. However, in this work, a photo-Fenton treatment was investigated for the first time for the degradation of GSM and MIB in both synthetic and Nak-Dong River water from DWTPs. Synthetic water-based experiments were performed to investigate the optimal operation conditions for the removal of GSM and MIB, and the effects of water quality parameters of the photo-Fenton process, including the Fe(II)/H2O2concentration, reaction time, pH, organic matter, and initial concentration of GSM and MIB. Degradation intermediates of dehydration and ring-opening were observed during the photo-Fenton process. The optimal conditions were determined to be 2 mg/L Fe(II) and 20 mg/L H2O2at pH 5 considering both efficiency and cost. The degradation efficiency was lower than that of DI water, mainly because of the pH (7.2–7.6). Nevertheless, the photo-Fenton process meets the guideline levels (20 ng/L) in South Korea when the initial concentration in the river water is below 50 ng/L. In addition, trihalomethanes (THMs) and microcystin-LR (MC-LR), derived from cyanobacterial blooms and another cause for concern, were degraded effectively using the photo-Fenton process on the river water.
AB - Due to the increased intensity and frequency of cyanobacterial blooms, taste and odor (T&O) causing compounds, geosmin (GSM) and 2-methylisoborneol (MIB), have become a cause for great concern in drinking water treatment plants (DWTPs). Advanced oxidation processes (AOPs) have been studied for the removal of GSM and MIB. However, in this work, a photo-Fenton treatment was investigated for the first time for the degradation of GSM and MIB in both synthetic and Nak-Dong River water from DWTPs. Synthetic water-based experiments were performed to investigate the optimal operation conditions for the removal of GSM and MIB, and the effects of water quality parameters of the photo-Fenton process, including the Fe(II)/H2O2concentration, reaction time, pH, organic matter, and initial concentration of GSM and MIB. Degradation intermediates of dehydration and ring-opening were observed during the photo-Fenton process. The optimal conditions were determined to be 2 mg/L Fe(II) and 20 mg/L H2O2at pH 5 considering both efficiency and cost. The degradation efficiency was lower than that of DI water, mainly because of the pH (7.2–7.6). Nevertheless, the photo-Fenton process meets the guideline levels (20 ng/L) in South Korea when the initial concentration in the river water is below 50 ng/L. In addition, trihalomethanes (THMs) and microcystin-LR (MC-LR), derived from cyanobacterial blooms and another cause for concern, were degraded effectively using the photo-Fenton process on the river water.
KW - Degradation intermediates
KW - Drinking water source
KW - Microcystin-LR
KW - Photo-Fenton process
KW - Taste and odor compounds
KW - Trihalomethanes
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U2 - 10.1016/j.cej.2016.12.086
DO - 10.1016/j.cej.2016.12.086
M3 - Article
AN - SCOPUS:85007496722
SN - 1385-8947
VL - 313
SP - 345
EP - 354
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
ER -