TY - JOUR
T1 - Sonolysis and sono-Fenton oxidation for removal of ibuprofen in (waste)water
AU - Adityosulindro, Sandyanto
AU - Barthe, Laurie
AU - González-Labrada, Katia
AU - Jáuregui Haza, Ulises Javier
AU - Delmas, Henri
AU - Julcour, Carine
N1 - Funding Information:
The authors are grateful to ANR (French National Research Agency) for research funding through ANR project ?SOFENcoMEM? (ANR-14-CE04-0006) and RISTEKDIKTI (Ministry of Research, Technology and Higher Education of Indonesia) for the scholarship of S. Adityosulindro (No. 2017/E4.4/K/2013). They also thank P. Calvet from Nailloux WWTP, G. Guittier (LGC), M.L. Pern (LGC) for their help on the analytical techniques and J.L. Labat (LGC) for the implementation of experimental setup.
Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2017/11
Y1 - 2017/11
N2 - Two sonochemical processes were compared for the removal of ibuprofen in different water matrixes (distilled water and effluent from wastewater treatment plant). The effect of various operating parameters, such as pH (2.6–8.0), ultrasound power density (25–100 W/L), sonication frequency (12–862 kHz), addition of radical promoters (H2O2 and Fenton's reagent) or scavengers (n-butanol and acetic acid), was evaluated. Sono-degradation of ibuprofen followed a first-order kinetic trend, whose rate constant increased with ultrasound density and frequency. For this hydrophobic and low volatile molecule, a free-radical mechanism at the bubble interface was established. Coupling ultrasound with Fenton reaction showed a positive synergy, especially in terms of mineralization yield, while adding H2O2 alone had no significant beneficial effect. Dedicated experiments proved this synergy to be due to the enhanced regeneration of ferrous ions by ultrasound. Efficacy of the sonolysis process was hampered in wastewater matrix, mainly as the consequence of higher pH increasing the molecule solubility. However, after convenient acidification, sono-Fenton oxidation results remained almost unchanged, indicating no significant radical scavenging effects from the effluent compounds.
AB - Two sonochemical processes were compared for the removal of ibuprofen in different water matrixes (distilled water and effluent from wastewater treatment plant). The effect of various operating parameters, such as pH (2.6–8.0), ultrasound power density (25–100 W/L), sonication frequency (12–862 kHz), addition of radical promoters (H2O2 and Fenton's reagent) or scavengers (n-butanol and acetic acid), was evaluated. Sono-degradation of ibuprofen followed a first-order kinetic trend, whose rate constant increased with ultrasound density and frequency. For this hydrophobic and low volatile molecule, a free-radical mechanism at the bubble interface was established. Coupling ultrasound with Fenton reaction showed a positive synergy, especially in terms of mineralization yield, while adding H2O2 alone had no significant beneficial effect. Dedicated experiments proved this synergy to be due to the enhanced regeneration of ferrous ions by ultrasound. Efficacy of the sonolysis process was hampered in wastewater matrix, mainly as the consequence of higher pH increasing the molecule solubility. However, after convenient acidification, sono-Fenton oxidation results remained almost unchanged, indicating no significant radical scavenging effects from the effluent compounds.
KW - Advanced oxidation processes
KW - Pharmaceuticals
KW - Ultrasound
KW - Water matrix
KW - Water treatment
UR - http://www.scopus.com/inward/record.url?scp=85021652417&partnerID=8YFLogxK
U2 - 10.1016/j.ultsonch.2017.06.008
DO - 10.1016/j.ultsonch.2017.06.008
M3 - Article
C2 - 28733020
AN - SCOPUS:85021652417
SN - 1350-4177
VL - 39
SP - 889
EP - 896
JO - Ultrasonics Sonochemistry
JF - Ultrasonics Sonochemistry
ER -