TY - JOUR
T1 - Removal of estrogens by electrochemical oxidation process
AU - Cong, Vo Huu
AU - Iwaya, Sota
AU - Sakakibara, Yutaka
N1 - Funding Information:
This research was supported in part by the Grant-in-Aid for Scientific Research (B) (No. 24360219), the Ministry of Education, Culture, Sports, Science and Technology (MEXT) and Waseda University Grants for Special Research Project (No. 2013A-887).
PY - 2014/6/1
Y1 - 2014/6/1
N2 - Treatments of estrogens such as Estrone (E1), Estradiol (E2) and Ethinylestradiol (EE2) were conducted using an electrolytic reactor equipped with multi-packed granular glassy carbon electrodes. Experimental results showed that E1, E2 and EE2 were oxidized in the range of 0.45-0.85 V and were removed through electro-polymerization. Observed data from continuous experiments were in good agreement with calculated results by a mathematical model constructed based on mass transfer limitation. In continuous treatment of trace estrogens (1 μg/L), 98% of E1, E2 and EE2 were stably removed. At high loading rate (100 μg/L), removal efficiency of E1 was kept around 74%-88% for 21 days, but removal efficiency reduced due to passivation of electrodes. However, removal efficiency was recovered after electrochemical regeneration of electrodes in presence of ozone. Electric energy consumption was observed in the range of 1-2 Wh/m3. From these results, we concluded that the present electrochemical process would be an alternative removal of estrogens.
AB - Treatments of estrogens such as Estrone (E1), Estradiol (E2) and Ethinylestradiol (EE2) were conducted using an electrolytic reactor equipped with multi-packed granular glassy carbon electrodes. Experimental results showed that E1, E2 and EE2 were oxidized in the range of 0.45-0.85 V and were removed through electro-polymerization. Observed data from continuous experiments were in good agreement with calculated results by a mathematical model constructed based on mass transfer limitation. In continuous treatment of trace estrogens (1 μg/L), 98% of E1, E2 and EE2 were stably removed. At high loading rate (100 μg/L), removal efficiency of E1 was kept around 74%-88% for 21 days, but removal efficiency reduced due to passivation of electrodes. However, removal efficiency was recovered after electrochemical regeneration of electrodes in presence of ozone. Electric energy consumption was observed in the range of 1-2 Wh/m3. From these results, we concluded that the present electrochemical process would be an alternative removal of estrogens.
KW - Electro-polymerization
KW - Electrode regeneration
KW - Endocrine disrupting chemicals
KW - Estrogen
KW - Granular reactor
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U2 - 10.1016/S1001-0742(13)60611-7
DO - 10.1016/S1001-0742(13)60611-7
M3 - Article
C2 - 25079848
AN - SCOPUS:84898482622
SN - 1001-0742
VL - 26
SP - 1355
EP - 1360
JO - Journal of Environmental Sciences (China)
JF - Journal of Environmental Sciences (China)
IS - 6
ER -
