Experimental and theoretical studies on aqueous-phase reactivity of hydroxyl radicals with multiple carboxylated and hydroxylated benzene compounds

2015 ◽  
Vol 17 (17) ◽  
pp. 11796-11812 ◽  
Author(s):  
Daisuke Minakata ◽  
Weihua Song ◽  
Stephen P. Mezyk ◽  
William J. Cooper
Keyword(s):  
Aqueous Phase ◽  
Hydroxyl Radicals ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Theoretical Studies ◽  
Oxidation Processes ◽  
Experimental And Theoretical Studies ◽  
Benzene Compounds ◽  
Shed Light

In this study, we shed light on the initial addition of hydroxyl radicals (HO˙) to multiple carboxylated and hydroxylated benzene compounds in aqueous-phase advanced oxidation processes (AOPs).

scholarly journals Degradation of Losartan in Fresh Urine by Sonochemical and Photochemical Advanced Oxidation Processes

Water ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 3398 ◽  
Author(s):  
John F. Guateque-Londoño ◽  
Efraím A. Serna-Galvis ◽  
Yenny Ávila-Torres ◽  
Ricardo A. Torres-Palma
Keyword(s):  
Hydroxyl Radical ◽  
Hydroxyl Radicals ◽  
Advanced Oxidation Processes ◽  
Degradation Products ◽  
Advanced Oxidation ◽  
Fukui Function ◽  
Oxidation Processes ◽  
Theoretical Analyses ◽  
Fresh Urine

In this work, the degradation of the pharmaceutical losartan, in simulated fresh urine (which was considered because urine is the main excretion route for this compound) by sonochemistry and UVC/H2O2 individually, was studied. Initially, special attention was paid to the degrading action of the processes. Then, theoretical analyses on Fukui function indices, to determine electron-rich regions on the pharmaceutical susceptible to attacks by the hydroxyl radical, were performed. Afterward, the ability of the processes to mineralize losartan and remove the phyto-toxicity was tested. It was found that in the sonochemical treatment, hydroxyl radicals played the main degrading role. In turn, in UVC/H2O2, both the light and hydroxyl radical eliminated the target contaminant. The sonochemical system showed the lowest interference for the elimination of losartan in the fresh urine. It was established that atoms in the imidazole of the contaminant were the moieties most prone to primary transformations by radicals. This was coincident with the initial degradation products coming from the processes action. Although both processes exhibited low mineralizing ability toward losartan, the sonochemical treatment converted losartan into nonphytotoxic products. This research presents relevant results on the elimination of a representative pharmaceutical in fresh urine by two advanced oxidation processes.

Assessment of the capability of Fe and Al modified BEA zeolites to promote advanced oxidation processes in aqueous phase

2020 ◽  
pp. 127379 ◽  
Author(s):  
Erick R. Bandala ◽  
Renata Sadek ◽  
Jacek Gurgul ◽  
Kazimierz Łątka ◽  
Małgorzata Zimowska ◽  
...  
Keyword(s):  
Aqueous Phase ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Oxidation Processes

Oxidation of diatrizoate in aqueous phase by advanced oxidation processes based on solar radiation

2016 ◽  
Vol 319-320 ◽  
pp. 87-95 ◽  
Author(s):  
A.M.S. Polo ◽  
J.J. López-Peñalver ◽  
M. Sánchez-Polo ◽  
J. Rivera-Utrilla ◽  
I. Velo-Gala ◽  
...  
Keyword(s):  
Solar Radiation ◽  
Aqueous Phase ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Oxidation Processes
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