Degradation of diatrizoate in water by Fe(II)-activated persulfate oxidation

Shang, Wentao; Dong, Zijun; Li, Mu; Song, Xinshan; Zhang, Miao; Jiang, Chengchun; Sun, Feiyun

doi:10.1016/j.cej.2018.12.139

Cited by 84 publications

(23 citation statements)

References 39 publications

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“…This occurrence can be interpreted in two ways: first, the excessive amount of Fe 2+ accelerated the scavenging activities of SO •− 4 radicals in the solution [40], and second, a higher concentration of Fe 2+ shifts the equilibrium toward the Fe-complex formation with the MB 9 pollutant in the solution [41]. Similar findings have also been reported in the literature on the degradation of different types of pollutants in the Fe 2+ /PS system [28,42].…”

Section: Effect Of Fe 2+ Concentrationsupporting

confidence: 81%

“…Rastogi et al [25] reported that 90% of polychlorinated biphenyl could be removed within 24 h by Fe(II)/Fe(III)-mediated activation of the PS system. In addition, several contaminants, such as carbamazepine [26], acetaminophen [27], diatrizoate [28], and iohexol [29], could be successfully degraded using the Fe 2+ /PS system. Studies on the degradation of dyes from textile wastewater by using the Fe 2+ /PS system have thus far been rarely investigated.…”

Section: Introductionmentioning

confidence: 99%

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Efficient Degradation of Mordant Blue 9 Using the Fenton-Activated Persulfate System

Pervez

Telegin

Cai

et al. 2019

Water

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In this study, a Fenton-activated persulfate (Fe 2+ /PS) system was introduced for the efficient degradation of Mordant Blue 9 (MB 9) as a textile dye in an aqueous solution. Results showed that the degradation of MB 9 was markedly influenced by operational parameters, such as initial pH, PS concentration, Fe 2+ concentration, and initial dye concentration. Optimal reaction conditions were then determined. Inorganic anions, such as Cl − and HCO 3 − , enhanced the degradation efficiency of MB 9 under optimal conditions. Addition of HCO 3 − reduced the degradation performance of MB 9, whereas the addition of Cl − increased the degradation percentage of MB 9. In addition, quenching experiments were conducted using methanol and tert-butyl alcohol as scavengers, and methanol was identified as an effective scavenger. Thus, the degradation of MB 9 was attributed to SO •− 4 and • OH radicals. The degradation and mineralization efficiency of MB 9 was significantly reduced using the conventional Fenton process i.e., Fe 2+ / hydrogen peroxide (HP) because of the formation of a Fe complex during degradation. Meanwhile, the Fe 2+ /persulfate (PS) system improved the degradation and mineralization performance.

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Section: Effect Of Fe 2+ Concentrationsupporting

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Efficient Degradation of Mordant Blue 9 Using the Fenton-Activated Persulfate System

Pervez

Telegin

Cai

et al. 2019

Water

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“…24 On the other hand, Shang et al obtained 10 : 1 [PS] 0 : [Fe 2+ ] 0 as the optimum ratio for degrading diatrizoate in a CAP system. 43 In order to study the effects of [PS] 0 on TP degradation, different [PS] 0 concentrations were used (0.25 to 5 mM) while maintaining a constant [PS] 0 : [Fe 2+ ] 0 ratio of 1 : 1 and [TP] 0 ¼ 10 mg L À1 at T ¼ 60 C. Fig. 3 and Table 3 show that the higher the [PS] 0 , the greater the observed rate constant k obs .…”

Section: Resultsmentioning

confidence: 99%

Chemically and thermally activated persulfate for theophylline degradation and application to pharmaceutical factory effluent

et al. 2019

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“…The chemical calculations are performed in the framework of Discrete Fourier Transform (DFT) using Gaussian 09 package according to the previous report 28 . The computational accuracy, feasibility and economical computational time were considered when choosing the computational levels and basis sets.…”

Section: Methodsmentioning

confidence: 99%

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

Dong

Chen

Sun

et al. 2020

Sci Rep

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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.

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Degradation of diatrizoate in water by Fe(II)-activated persulfate oxidation

Cited by 84 publications

References 39 publications

Efficient Degradation of Mordant Blue 9 Using the Fenton-Activated Persulfate System

Efficient Degradation of Mordant Blue 9 Using the Fenton-Activated Persulfate System

Chemically and thermally activated persulfate for theophylline degradation and application to pharmaceutical factory effluent

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

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