Removal of acetaminophen in the Fe2+/persulfate system: Kinetic model and degradation pathways

Wang, Song Lin; Wu, Jerry J.; Lü, Xin-You; Xu, Wenxin; Gong, Qing; Ding, Jiaqi; Dan, Bingsong; Xie, Pengchao

doi:10.1016/j.cej.2018.09.145

Cited by 214 publications

(57 citation statements)

References 55 publications

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“…Wang et al observed inhibition of acetaminophen degradation at low chloride concentrations and enhancement at high concentrations, while Amasha et al noted inhibition of ketoprofen degradation, both in Fe 2+ /PS systems. 34,54 The increased degradation in the presence of Cl À can be explained by the formation of Clc, which has a redox potential close to that of SO 4 c À , in addition to the formation of reactive HOc (eqn (9) and (11)-(13)). 50,51 ], where k obs increased by 6 fold from 5.6 (AE0.4) Â 10 À2 min À1 to 1.0 (AE0.1) Â 10 À1 min À1 in DI media and [NO 3 À ] ¼ 1 mg L À1 , respectively, and then slightly decreased for [NO 3 À ] ¼ 10 and 100 mg L À1 to values of 9.0 (AE0.1) Â 10 À2 min À1 and 7.6 (AE0.7) Â 10 À2 min À1 , respectively ( Fig.…”

Section: Additive and Matrix Effects In The Tcap Systemmentioning

confidence: 99%

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

et al. 2019

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Section: Additive and Matrix Effects In The Tcap Systemmentioning

confidence: 99%

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

et al. 2019

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“…9 , ·OH would be generated whose oxidation–reduction potential is lower than SO 4 − 38 . However, sulfate and hydroxyl radicals were slightly influenced by the variation of the initial pH 38 , 39 . Hence, the main reason was the formation of an Fe 2+ complex at pH > 4.0 that would be expected to hinder the reaction of Fe 2+ with PS 39 Hence, the oxidizing ability of the system was decreased, corresponding to a low IPM removal efficiency.…”

Section: Resultsmentioning

confidence: 97%

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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“…In order to further understand the fluoride adsorption behaviors onto GO/Al 2 O 3 , the pseudo‐first‐order and pseudo‐second‐order kinetic models are employed to simulate the adsorption data. The equations are given as follows:

true prefixln (q_{e} - q_{t}) = prefixln q_{e} - k_{1} t

true \frac{t}{q_{t}} = \frac{1}{k_{2} q_{e}^{2}} + \frac{1}{q_{e}} t

…”

Section: Resultsmentioning

confidence: 99%

Removal of Fluoride by Graphene Oxide/Alumina Nanocomposite: Adsorbent Preparation, Characterization, Adsorption Performance and Mechanisms

et al. 2020

ChemistrySelect

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GO/Al2O3 was successfully prepared by using hydrothermal method which was used to study the removing of fluoride from water. The characterization results of X‐ray diffraction (XRD), transmission electron microscope (TEM) and Fourier transform infrared (FT‐IR) spectra indicated that γ‐Al2O3 had been modified onto GO nanosheets. The BET surface area of GO/Al2O3 is 326.22 m2 g−1 and the corresponding pore size center at 3.7 nm. A batch of fluoride adsorption experiments were employed to investigate the effects of various factors such as solution pH values, contact time, fluoride initial concentrations, temperature, adsorbent dose, co‐existing anions, and recycling on fluoride removal. The results showed that the adsorption capacity (4.68 mg g‐1) of GO/Al2O3 is higher than that of γ‐Al2O3 (3.04 mg g−1). In addition, the modified adsorbent had a wide range of pH applications. Adsorption kinetics is well represented by the pseudo‐second‐order model, which indicating the adsorption processes are involved in chemisorption with ion exchange. The influences of co‐existing anions on fluoride removal followed the decreasing order of PO43‐>HCO3‐>SO42‐>Cl‐>NO3‐, which was related to the charge and radius of ions. The recycle performance of GO/Al2O3 is not so good owing to the poor strength of GO during the cycle process. Fluoride adsorption onto GO/Al2O3 could be attributed to electrostatic attraction, ligand exchange, ion exchange and hydrogen‐bond interaction between fluoride and OH groups.

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Removal of acetaminophen in the Fe2+/persulfate system: Kinetic model and degradation pathways

Cited by 214 publications

References 55 publications

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

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

Removal of Fluoride by Graphene Oxide/Alumina Nanocomposite: Adsorbent Preparation, Characterization, Adsorption Performance and Mechanisms

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