Photosensitivity sources of dissolved organic matter from wastewater treatment plants and their mediation effect on 17α-ethinylestradiol photodegradation

Liao, Zhicheng; Li, Bei; Zhan, Juhong; He, Huan; Yang, Xiaoxia; Zhou, Dongxu; Yu, Guoxi; Lai, Chaochao; Huan, Bin; Pan, Xuejun

doi:10.1007/s11783-023-1669-1

Cited by 12 publications

(2 citation statements)

References 61 publications

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“…Beside antibiotics, those contaminated aquatic environments also contain a large number of humic constituents that can be transformed by MnO 2 . These humic constituents greatly influenced the transformation of antibiotics as electron mediators and cosubstrates. – Guo et al found that model humic constituents (including catechol, hydroquinone, and resorcinol) largely enhanced the degradation of sulfamethoxazole (SMX) during permanganate oxidation. The acute toxicity of the treated mixture was much lower than that of the untreated ones by converting the aniline group of pharmacological activities. , Because of the small number of toxic products, – it is promising for the detoxification of SMX.…”

Section: Introductionmentioning

confidence: 99%

Degradation of Sulfamethoxazole by Manganese(IV) Oxide in the Presence of Humic Acid: Role of Stabilized Semiquinone Radicals

Zhong,

Cao,

Huang

et al. 2023

Environ. Sci. Technol.

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In this work, we demonstrate for the first time the abatement of sulfamethoxazole (SMX) induced by stabilized orthosemiquinone radicals (o-SQ •− ) in the MnO 2 -mediated system in the presence of humic acid. To evaluate the performance of different MnO 2 /mediator systems, 16 mediators are examined for their effects on MnO 2 reactions with SMX. The key role of the bidentate Mn(II)o-SQ • complex and MnO 2 surface in stabilizing SQ •− is revealed. To illustrate the formation of the Mn(II)-o-SQ • complex, electron spin resonance, cyclic voltammetry, and mass spectra were used. To demonstrate the presence of o-SQ • on the MnO 2 surface, EDTA was used to quench Mn(II)-o-SQ • . The high stability of o-SQ •− on the MnO 2 surface is attributed to the higher potential of o-SQ •− (0.9643 V) than the MnO 2 surface (0.8598 V) at pH 7.0. The SMX removal rate constant by different stabilized o-SQ • at pH 7.0 ranges from 0.0098 to 0.2252 min −1 . The favorable model is the rate constant ln (k obs, 7.0 ) = 6.002E HOMO (o-Q red ) + 33.744(E LUMO (o-Q) − E HOMO (o-Q red )) − 32.800, whose parameters represent the generation and reactivity of o-SQ • , respectively. Moreover, aniline and cystine are competitive substrates for SMX in coupling o-SQ •− . Due to the abundance of humic constituents in aquatic environments, this finding sheds light on the low-oxidant-demand, low-carbon, and highly selective removal of sulfonamide antibiotics.

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Section: Introductionmentioning

confidence: 99%

Degradation of Sulfamethoxazole by Manganese(IV) Oxide in the Presence of Humic Acid: Role of Stabilized Semiquinone Radicals

Zhong,

Cao,

Huang

et al. 2023

Environ. Sci. Technol.

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“…Previous studies have reported that effluent organic matter (EfOM) presented higher photochemical activity and photo quantum yields of RIs (HO • , 1 O 2 and 3 DOM⁎) than reference NOM samples [14] , [30] , [47] , [61] . On the one hand, aromatic ketones were found to be important photosensitizers in EfOM, while quinone moieties play a key role in NOM-enriched solutions [64] .…”

Section: Resultsmentioning

confidence: 99%

The photolytic behavior of COVID-19 antivirals ribavirin in natural waters and the increased environmental risk

Guo

Liu

et al. 2023

Journal of Hazardous Materials

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Current status and performance evaluation of emerging advanced remediation techniques for the removal of steroidal hormones in water

Bayode,

Emmanuel,

Sanni

et al. 2024

Environmental Chemistry and Ecotoxicology

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Photosensitivity sources of dissolved organic matter from wastewater treatment plants and their mediation effect on 17α-ethinylestradiol photodegradation

Cited by 12 publications

References 61 publications

Degradation of Sulfamethoxazole by Manganese(IV) Oxide in the Presence of Humic Acid: Role of Stabilized Semiquinone Radicals

Degradation of Sulfamethoxazole by Manganese(IV) Oxide in the Presence of Humic Acid: Role of Stabilized Semiquinone Radicals

The photolytic behavior of COVID-19 antivirals ribavirin in natural waters and the increased environmental risk

Current status and performance evaluation of emerging advanced remediation techniques for the removal of steroidal hormones in water

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