Degradation of β-blockers in hospital wastewater by means of ozonation and Fe2+/ozonation

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Degradation of β-blockers in hospital wastewater by means of ozonation and Fe2+/ozonation. / Wilde, Marcelo L.; Montipó, Sheila; Martins, Ayrton F.
In: Water Research, Vol. 48, No. 1, 01.01.2014, p. 280-295.

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Wilde ML, Montipó S, Martins AF. Degradation of β-blockers in hospital wastewater by means of ozonation and Fe2+/ozonation. Water Research. 2014 Jan 1;48(1):280-295. doi: 10.1016/j.watres.2013.09.039

Bibtex

@article{404d4b7ff81c41b99a18dbc8ae8c2eca,
title = "Degradation of β-blockers in hospital wastewater by means of ozonation and Fe2+/ozonation",
abstract = "This study investigates the degradation of the β-blockers in hospital wastewater by direct ozonation and Fe2+/ozonation with a focus on measurements at different initial pHs and Fe2+ concentrations, and the determination of kinetic constants. The results showed that these 'emerging contaminants' were completely degraded, when the removal rate of organic matter reached 30.6% and 49.1% for ozonation and Fe2+/ozonation, respectively. Likewise, the aromaticity removal rates were 63.4% and 77.9% for ozonation and Fe2+/ozonation, respectively. The experimental design showed that pH was the variable which had the greatest effect on the Fe2+/ozonation. The kinetic constants of atenolol, metoprolol and propranolol degradation by direct ozonation complied with pseudo-first-order conditions, while Fe2+/ozonation was suited to a biphasic degradation model. The kobs tended to rise when the pH increases; propranolol showed high kobs, which can be attributed to the naphthalene group (an electron-rich moiety). The identification of degradation products was carried out in aqueous solution using HPLC-MS2, followed by a suggestion of degradation pathways by means of ozonation. The degradation products proved to be dependent on the initial pH, and followed pathways that are based on direct ozonolysis and free radicals.",
keywords = "β-blockers, Catalytic ozonation, Degradation pathways, Hospital wastewater, Ozonation, Chemistry",
author = "Wilde, {Marcelo L.} and Sheila Montip{\'o} and Martins, {Ayrton F.}",
year = "2014",
month = jan,
day = "1",
doi = "10.1016/j.watres.2013.09.039",
language = "English",
volume = "48",
pages = "280--295",
journal = "Water Research",
issn = "0043-1354",
publisher = "IWA Publishing",
number = "1",

}

RIS

TY - JOUR

T1 - Degradation of β-blockers in hospital wastewater by means of ozonation and Fe2+/ozonation

AU - Wilde, Marcelo L.

AU - Montipó, Sheila

AU - Martins, Ayrton F.

PY - 2014/1/1

Y1 - 2014/1/1

N2 - This study investigates the degradation of the β-blockers in hospital wastewater by direct ozonation and Fe2+/ozonation with a focus on measurements at different initial pHs and Fe2+ concentrations, and the determination of kinetic constants. The results showed that these 'emerging contaminants' were completely degraded, when the removal rate of organic matter reached 30.6% and 49.1% for ozonation and Fe2+/ozonation, respectively. Likewise, the aromaticity removal rates were 63.4% and 77.9% for ozonation and Fe2+/ozonation, respectively. The experimental design showed that pH was the variable which had the greatest effect on the Fe2+/ozonation. The kinetic constants of atenolol, metoprolol and propranolol degradation by direct ozonation complied with pseudo-first-order conditions, while Fe2+/ozonation was suited to a biphasic degradation model. The kobs tended to rise when the pH increases; propranolol showed high kobs, which can be attributed to the naphthalene group (an electron-rich moiety). The identification of degradation products was carried out in aqueous solution using HPLC-MS2, followed by a suggestion of degradation pathways by means of ozonation. The degradation products proved to be dependent on the initial pH, and followed pathways that are based on direct ozonolysis and free radicals.

AB - This study investigates the degradation of the β-blockers in hospital wastewater by direct ozonation and Fe2+/ozonation with a focus on measurements at different initial pHs and Fe2+ concentrations, and the determination of kinetic constants. The results showed that these 'emerging contaminants' were completely degraded, when the removal rate of organic matter reached 30.6% and 49.1% for ozonation and Fe2+/ozonation, respectively. Likewise, the aromaticity removal rates were 63.4% and 77.9% for ozonation and Fe2+/ozonation, respectively. The experimental design showed that pH was the variable which had the greatest effect on the Fe2+/ozonation. The kinetic constants of atenolol, metoprolol and propranolol degradation by direct ozonation complied with pseudo-first-order conditions, while Fe2+/ozonation was suited to a biphasic degradation model. The kobs tended to rise when the pH increases; propranolol showed high kobs, which can be attributed to the naphthalene group (an electron-rich moiety). The identification of degradation products was carried out in aqueous solution using HPLC-MS2, followed by a suggestion of degradation pathways by means of ozonation. The degradation products proved to be dependent on the initial pH, and followed pathways that are based on direct ozonolysis and free radicals.

KW - β-blockers

KW - Catalytic ozonation

KW - Degradation pathways

KW - Hospital wastewater

KW - Ozonation

KW - Chemistry

UR - http://www.scopus.com/inward/record.url?scp=84888435346&partnerID=8YFLogxK

U2 - 10.1016/j.watres.2013.09.039

DO - 10.1016/j.watres.2013.09.039

M3 - Journal articles

C2 - 24436986

AN - SCOPUS:84888435346

VL - 48

SP - 280

EP - 295

JO - Water Research

JF - Water Research

SN - 0043-1354

IS - 1

ER -