Electrochemical oxidation of iohexol in wastewater by boron doped diamond electrodes: identification of by-products and degradation pathway

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12520%2F25%3A43910075" target="_blank" >RIV/60076658:12520/25:43910075 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.jelechem.2025.119570" target="_blank" >https://doi.org/10.1016/j.jelechem.2025.119570</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jelechem.2025.119570" target="_blank" >10.1016/j.jelechem.2025.119570</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Electrochemical oxidation of iohexol in wastewater by boron doped diamond electrodes: identification of by-products and degradation pathway

Popis výsledku v původním jazyce

Wastewater is considered a significant source of various organic pollutants which can be harmful to the living part of the environment. In this study, the electrochemical oxidation of iohexol, a representative iodinated contrast medium, in real wastewater influent using boron doped diamond (BDD) electrodes has been investigated. The findings of this study demonstrate that the oxidation of iohexol on BDD electrodes follows pseudofirst-order kinetics and an increase in the applied current density is associated with an enhancement in removal efficiency. At the higher current density of 100 mA.cm-2 almost total elimination of iohexol is achieved. Targeted LC-MS/MS analysis of the real influent wastewater revealed the presence of various pharmaceuticals belonging to different pharmaceutical classes, as well as illicit drugs and selected metabolites. An increase in the current density was observed to exert a comparable effect on their elimination as that observed in the case of iohexol, for some analytes, to a lesser or greater extent. Using the HPLC-HRMS method, eight degradation byproducts of iohexol were identified, and their structures were proposed. A degradation pathway for electrochemical oxidation employing BDD electrodes was elucidated.

Název v anglickém jazyce

Electrochemical oxidation of iohexol in wastewater by boron doped diamond electrodes: identification of by-products and degradation pathway

Popis výsledku anglicky

Wastewater is considered a significant source of various organic pollutants which can be harmful to the living part of the environment. In this study, the electrochemical oxidation of iohexol, a representative iodinated contrast medium, in real wastewater influent using boron doped diamond (BDD) electrodes has been investigated. The findings of this study demonstrate that the oxidation of iohexol on BDD electrodes follows pseudofirst-order kinetics and an increase in the applied current density is associated with an enhancement in removal efficiency. At the higher current density of 100 mA.cm-2 almost total elimination of iohexol is achieved. Targeted LC-MS/MS analysis of the real influent wastewater revealed the presence of various pharmaceuticals belonging to different pharmaceutical classes, as well as illicit drugs and selected metabolites. An increase in the current density was observed to exert a comparable effect on their elimination as that observed in the case of iohexol, for some analytes, to a lesser or greater extent. Using the HPLC-HRMS method, eight degradation byproducts of iohexol were identified, and their structures were proposed. A degradation pathway for electrochemical oxidation employing BDD electrodes was elucidated.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10406 - Analytical chemistry

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Electroanalytical Chemistry

ISSN

1572-6657

e-ISSN

1873-2569

Svazek periodika

999

Číslo periodika v rámci svazku

neuvedeno

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

9

Strana od-do

nestránkováno

Kód UT WoS článku

001612943500001

EID výsledku v databázi Scopus

2-s2.0-105024758079