Fe(II)-activated persulfate oxidation to degrade iopamidol in water: parameters optimization and degradation paths

Abstract Iodinated contrast media (ICM), which was widely used in medical imaging and was difficult to remove by conventional wastewater treatment methods, attained much attention due to its potential environmental impacts. Herein, iopamidol (IPM), one typical compound of ICM, was found to be rapidl...

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Autores principales:	Zijun Dong, Guanhan Chen, Mu Li, Feiyun Sun, Chengchun Jiang, Bandna Bharti
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/786819684ae349ee90b048a49ef1a693
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spelling	oai:doaj.org-article:786819684ae349ee90b048a49ef1a6932021-12-02T11:43:51ZFe(II)-activated persulfate oxidation to degrade iopamidol in water: parameters optimization and degradation paths10.1038/s41598-020-78468-y2045-2322https://doaj.org/article/786819684ae349ee90b048a49ef1a6932020-12-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-78468-yhttps://doaj.org/toc/2045-2322Abstract Iodinated contrast media (ICM), which was widely used in medical imaging and was difficult to remove by conventional wastewater treatment methods, attained much attention due to its potential environmental impacts. Herein, iopamidol (IPM), one typical compound of ICM, was found to be rapidly degraded by ferrous activated persulfate oxidation (Fe(II)/PS) as compared with PS or Fe(II) alone. With a persulfate concentration of 1 mmol L−1, n(Fe(II))/n(PS) of 1:10, and a pH of 3.0, 78% IPM was degraded within 60 min, with a degradation rate of 0.1266 min−1. It was demonstrated that IPM degradation and deiodination were favored by a high temperature, while affected positively by acidic and neutral conditions. Radical quenching experiments and Electron Paramagnetic Resonace (EPR) spectra showed that the combined effects of SO4 − · and ·OH contributed dominantly to degrade IPM, while the ·OH played an essential role during the degradation reaction. Through the Discrete Fourier Transform quantum chemical calculation, the possible reaction pathways for the oxidation of IPM by ·OH are as follows: IPM-TP651-TP667-TP541-TP557, IPM-TP651-TP525-TP557, IPM-TP705-TP631-TP661, and IPM-TP705-TP735. The obtained results showed that IPM could be degraded effectively by Fe(II)/PS system, giving a promising technique for IPM removal from water.Zijun DongGuanhan ChenMu LiFeiyun SunChengchun JiangBandna BhartiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-11 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Zijun Dong Guanhan Chen Mu Li Feiyun Sun Chengchun Jiang Bandna Bharti Fe(II)-activated persulfate oxidation to degrade iopamidol in water: parameters optimization and degradation paths
description	Abstract Iodinated contrast media (ICM), which was widely used in medical imaging and was difficult to remove by conventional wastewater treatment methods, attained much attention due to its potential environmental impacts. Herein, iopamidol (IPM), one typical compound of ICM, was found to be rapidly degraded by ferrous activated persulfate oxidation (Fe(II)/PS) as compared with PS or Fe(II) alone. With a persulfate concentration of 1 mmol L−1, n(Fe(II))/n(PS) of 1:10, and a pH of 3.0, 78% IPM was degraded within 60 min, with a degradation rate of 0.1266 min−1. It was demonstrated that IPM degradation and deiodination were favored by a high temperature, while affected positively by acidic and neutral conditions. Radical quenching experiments and Electron Paramagnetic Resonace (EPR) spectra showed that the combined effects of SO4 − · and ·OH contributed dominantly to degrade IPM, while the ·OH played an essential role during the degradation reaction. Through the Discrete Fourier Transform quantum chemical calculation, the possible reaction pathways for the oxidation of IPM by ·OH are as follows: IPM-TP651-TP667-TP541-TP557, IPM-TP651-TP525-TP557, IPM-TP705-TP631-TP661, and IPM-TP705-TP735. The obtained results showed that IPM could be degraded effectively by Fe(II)/PS system, giving a promising technique for IPM removal from water.
format	article
author	Zijun Dong Guanhan Chen Mu Li Feiyun Sun Chengchun Jiang Bandna Bharti
author_facet	Zijun Dong Guanhan Chen Mu Li Feiyun Sun Chengchun Jiang Bandna Bharti
author_sort	Zijun Dong
title	Fe(II)-activated persulfate oxidation to degrade iopamidol in water: parameters optimization and degradation paths
title_short	Fe(II)-activated persulfate oxidation to degrade iopamidol in water: parameters optimization and degradation paths
title_full	Fe(II)-activated persulfate oxidation to degrade iopamidol in water: parameters optimization and degradation paths
title_fullStr	Fe(II)-activated persulfate oxidation to degrade iopamidol in water: parameters optimization and degradation paths
title_full_unstemmed	Fe(II)-activated persulfate oxidation to degrade iopamidol in water: parameters optimization and degradation paths
title_sort	fe(ii)-activated persulfate oxidation to degrade iopamidol in water: parameters optimization and degradation paths
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/786819684ae349ee90b048a49ef1a693
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_version_	1718395350850469888

Fe(II)-activated persulfate oxidation to degrade iopamidol in water: parameters optimization and degradation paths

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