TY - JOUR
T1 - Oxidation of microcystin-LR by the Fenton process
T2 - Kinetics, degradation intermediates, water quality and toxicity assessment
AU - Park, Jeong Ann
AU - Yang, Boram
AU - Park, Chanhyuk
AU - Choi, Jae Woo
AU - van Genuchten, Case M.
AU - Lee, Sang Hyup
N1 - Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) 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.
PY - 2017/2/1
Y1 - 2017/2/1
N2 - The Fenton process was assessed as a cost-effective technology for the removal of Microcystin-LR (MC-LR) among UV, UV/H2O2, and Fenton process according to efficiency and electrical energy per order (EE/O). The determined practical concentrations of the Fenton reagents were 5 mg/L Fe(II) and 5 mg/L H2O2, respectively. The Fenton process is a fast reaction, completed within 5–30 min (Fe(II), H2O2 = 0.2–10 mg/L; MC-LR0 = 200 μg/L). The degradation intermediates of MC-LR by the Fenton process were firstly reported as m/z 1029.5, 1011.5, 835.5, 795.4, and 783.4, associated with the diene bond in the Adda chain, then alleviate their toxicity. The effects of organic matter were examined in the range of Nak-Dong River water, as a drinking water source, monitored for six months in 2015. Fulvic acid was affected more than humic acid and natural organic matter (NOM). The degradation efficiency in the raw water was lower than that of distilled water because of the competing effect of NOM, geosmin, and 2-methylisoborneol, and the higher pH (7.64), furthermore, dissolved organic matter, geosmin, and 2-methylisoborneol was removed 7.39%, 4.28% and 12.30% after the Fenton process in the river water. The final concentration of MC-LR after treatment was under the drinking water guideline level with initial MC-LR concentration of 2 μg/L. No acute toxicity was observed to Daphnia magna (TU = 0) after the Fenton process.
AB - The Fenton process was assessed as a cost-effective technology for the removal of Microcystin-LR (MC-LR) among UV, UV/H2O2, and Fenton process according to efficiency and electrical energy per order (EE/O). The determined practical concentrations of the Fenton reagents were 5 mg/L Fe(II) and 5 mg/L H2O2, respectively. The Fenton process is a fast reaction, completed within 5–30 min (Fe(II), H2O2 = 0.2–10 mg/L; MC-LR0 = 200 μg/L). The degradation intermediates of MC-LR by the Fenton process were firstly reported as m/z 1029.5, 1011.5, 835.5, 795.4, and 783.4, associated with the diene bond in the Adda chain, then alleviate their toxicity. The effects of organic matter were examined in the range of Nak-Dong River water, as a drinking water source, monitored for six months in 2015. Fulvic acid was affected more than humic acid and natural organic matter (NOM). The degradation efficiency in the raw water was lower than that of distilled water because of the competing effect of NOM, geosmin, and 2-methylisoborneol, and the higher pH (7.64), furthermore, dissolved organic matter, geosmin, and 2-methylisoborneol was removed 7.39%, 4.28% and 12.30% after the Fenton process in the river water. The final concentration of MC-LR after treatment was under the drinking water guideline level with initial MC-LR concentration of 2 μg/L. No acute toxicity was observed to Daphnia magna (TU = 0) after the Fenton process.
KW - Degradation intermediates
KW - Fenton oxidation process
KW - Microcystin-LR
KW - Nak-Dong River
KW - Toxicity assessment
KW - Water quality parameters
UR - http://www.scopus.com/inward/record.url?scp=84994259551&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2016.10.083
DO - 10.1016/j.cej.2016.10.083
M3 - Article
AN - SCOPUS:84994259551
SN - 1385-8947
VL - 309
SP - 339
EP - 348
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
ER -