Oxidation-coagulation of β-blockers by K2Fe(VI)O4 in hospital wastewater: Assessment of degradation products and biodegradability
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in: The Science of The Total Environment, Jahrgang 452-453, 01.05.2013, S. 137-147.
Publikation: Beiträge in Zeitschriften › Zeitschriftenaufsätze › Forschung › begutachtet
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TY - JOUR
T1 - Oxidation-coagulation of β-blockers by K2Fe(VI)O4 in hospital wastewater
T2 - Assessment of degradation products and biodegradability
AU - Wilde, Marcelo Luis
AU - Mahmoud, Waleed M M
AU - Kümmerer, Klaus
AU - Martins, Ayrton F
N1 - Copyright © 2013 Elsevier B.V. All rights reserved.
PY - 2013/5/1
Y1 - 2013/5/1
N2 - This study investigated the degradation of atenolol, metoprolol and propranolol beta-blockers by ferrate (K 2FeO 4) in hospital wastewater and in aqueous solution. In the case of hospital wastewater, the effect of the independent variables pH and [Fe(VI)] was evaluated by means of response surface methodology. The results showed that Fe(VI) plays an important role in the oxidation-coagulation process, and the treatment of the hospital wastewater led to degradations above 90% for all the three β-blockers, and to reductions of aromaticity that were close to 60%. In addition, only 17% of the organic load was removed. In aqueous solution, the degradation of the β-blockers atenolol, metoprolol and propranolol was 71.7%, 24.7% and 96.5%, respectively, when a ratio of 1:10 [β-blocker]:[Fe(VI)] was used. No mineralization was achieved, which suggests that there was a conversion of the β-blockers to degradation products identified by liquid chromatography/mass spectrometry tandem. Degradation pathways were proposed, which took account of the role of Fe(VI). Furthermore, the ready biodegradability of the post-process samples was evaluated by using the closed bottle test, and showed an increase in biodegradability. The use of the ferrate advanced oxidation technology seems to be a useful means of ensuring the remediation of hospital and similar wastewater.
AB - This study investigated the degradation of atenolol, metoprolol and propranolol beta-blockers by ferrate (K 2FeO 4) in hospital wastewater and in aqueous solution. In the case of hospital wastewater, the effect of the independent variables pH and [Fe(VI)] was evaluated by means of response surface methodology. The results showed that Fe(VI) plays an important role in the oxidation-coagulation process, and the treatment of the hospital wastewater led to degradations above 90% for all the three β-blockers, and to reductions of aromaticity that were close to 60%. In addition, only 17% of the organic load was removed. In aqueous solution, the degradation of the β-blockers atenolol, metoprolol and propranolol was 71.7%, 24.7% and 96.5%, respectively, when a ratio of 1:10 [β-blocker]:[Fe(VI)] was used. No mineralization was achieved, which suggests that there was a conversion of the β-blockers to degradation products identified by liquid chromatography/mass spectrometry tandem. Degradation pathways were proposed, which took account of the role of Fe(VI). Furthermore, the ready biodegradability of the post-process samples was evaluated by using the closed bottle test, and showed an increase in biodegradability. The use of the ferrate advanced oxidation technology seems to be a useful means of ensuring the remediation of hospital and similar wastewater.
KW - Chemistry
KW - β-Blockers
KW - Degradation pathways
KW - Ferrate advanced oxidation
KW - Hospital wastewater
KW - Response surface methodology
UR - http://www.scopus.com/inward/record.url?scp=84875242048&partnerID=8YFLogxK
U2 - 10.1016/j.scitotenv.2013.01.059
DO - 10.1016/j.scitotenv.2013.01.059
M3 - Journal articles
C2 - 23500407
VL - 452-453
SP - 137
EP - 147
JO - The Science of The Total Environment
JF - The Science of The Total Environment
SN - 0048-9697
ER -