Elimination of the iodinated contrast agent iohexol in water, wastewater and urine matrices by application of photo-Fenton and ultrasound advanced oxidation processes

“…Also, urine contains large amounts of proteins, such as urobilin, serum albumins, transferrins etc, some of which contain groups which absorb in the UV region. On the other hand, transferrins can bind the iron (Davis et al, 1962), which limit the participation in the Fenton reaction (Papoutsakis et al, 2015a). This hypothesis is further strengthened when examining the diluted urine matrix.…”

Section: Real Urinementioning

confidence: 98%

Iohexol degradation in wastewater and urine by UV-based Advanced Oxidation Processes (AOPs): Process modeling and by-products identification

Giannakis

Jović

Gasilova

et al. 2017

Journal of Environmental Management

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In this work, an Iodinated Contrast Medium (ICM), Iohexol, was subjected to treatment by 3 Advanced Oxidation Processes (AOPs) (UV, UV/HO, UV/HO/Fe). Water, wastewater and urine were spiked with Iohexol, in order to investigate the treatment efficiency of AOPs. A tri-level approach has been deployed to assess the UV-based AOPs efficacy. The treatment was heavily influenced by the UV transmittance and the organics content of the matrix, as dilution and acidification improved the degradation but iron/HO increase only moderately. Furthermore, optimization of the treatment conditions, as well as modeling of the degradation was performed, by step-wise constructed quadratic or product models, and determination of the optimal operational regions was achieved through desirability functions. Finally, global chemical parameters (COD, TOC and UV-Vis absorbance) were followed in parallel with specific analyses to elucidate the degradation process of Iohexol by UV-based AOPs. Through HPLC/MS analysis the degradation pathway and the effects the operational parameters were monitored, thus attributing the pathways the respective modifications. The addition of iron in the UV/HO process inflicted additional pathways beneficial for both Iohexol and organics removal from the matrix.

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“…In addition to the above-mentioned primary parameters (frequency, power, and compound nature), the matrix also plays a determinant role in the cavitation (physical effects) and the elimination of the pollutants (chemical effects). Matrices such as seawater, mineral water, and urine are aqueous samples rich in salts/ions [16] , [18] , [19] , [26] , [52] . It is reported that upon saturation of water with salts of NaCl and KCl, a significant change in the physicochemical properties of water, modifying the regime of induction of cavitation bubbles.…”

Section: Some Fundamental Aspects Of the Sonochemical Processmentioning

confidence: 99%

“…Ultrasound based-processes have shown to be useful to deal with complex matrices such as seawater [16] , mineral water [17] , and urine [18] , [19] . There is an increasing interest in the ultrasonic action on pollutants elimination in salts/ions-rich matrices because of the singular degradation behaviors (e.g., pollutants removals increment by bicarbonate ion presence or salting-out effects) and the relationship of these matrices with various organisms.…”

Section: Introductionmentioning

confidence: 99%

A critical review on the sonochemical degradation of organic pollutants in urine, seawater, and mineral water

Serna-Galvis

Porras

Torres-Palma

2022

Ultrasonics Sonochemistry

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Highlights Sonodegradation of organic pollutants in ions-rich matrices is critically reviewed. Ultrasound is able to degrade pollutants of diverse nature in ions-rich matrices. Low concentrations of contaminants favor degradation in mineral water and seawater. Efficient pollutants sonodegradation in mineral water or seawater but action in urine is limited. Ecotoxicity and transformations after ultrasound action on matrices must be tested.

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Elimination of the iodinated contrast agent iohexol in water, wastewater and urine matrices by application of photo-Fenton and ultrasound advanced oxidation processes

Cited by 25 publications

References 28 publications

Elimination of cephalexin and doxycycline under low frequency ultrasound

Elimination of cephalexin and doxycycline under low frequency ultrasound

Iohexol degradation in wastewater and urine by UV-based Advanced Oxidation Processes (AOPs): Process modeling and by-products identification

A critical review on the sonochemical degradation of organic pollutants in urine, seawater, and mineral water

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