Efficient peroxymonosulfate activation and less metallic leaching through kaolin@MnCo2O4 for bisphenol A degradation in environmental remediation

Wang, Qiao; Xu, Zetao; Yan, Jiang; Lu, Jiahong; Li, Huarui; Du, Xing; Wang, Zhihong

doi:10.1016/j.apsusc.2022.152705

Cited by 23 publications

(4 citation statements)

References 57 publications

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“…A pollutant solution (50 mL) was considered, and the solid material (Φy or MMO) and PMS were added at 0.2 g L −1 and 500 µmol L −1 , respectively. The concentrations of catalysts and peroxides were chosen based on previous works, which report the use of oxidants (e.g., PMS) in the range of 50-1000 µmol L −1 and 0.25-1.0 g L −1 for the solid catalysts as the suitable amounts for the activation process development [53][54][55][56][57][58].…”

Section: Reaction Systems For Pollutant Removalmentioning

confidence: 99%

Materials Based on Co, Cu, and Cr as Activators of PMS for Degrading a Representative Antibiotic—The Strategy for Utilization in Water Treatment and Warnings on Metal Leaching

et al. 2023

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A chromate of copper and cobalt (Φy) was synthesized and characterized. Φy activated peroxymonosulfate (PMS) to degrade ciprofloxacin (CIP) in water. The Φy/PMS combination showed a high degrading capability toward CIP (~100% elimination in 15 min). However, Φy leached cobalt (1.6 mg L−1), limiting its use for water treatment. To avoid leaching, Φy was calcinated, forming a mixed metal oxide (MMO). In the combination of MMO/PMS, no metals leached, the CIP adsorption was low (<20%), and the action of SO4•− dominated, leading to a synergistic effect on pollutant elimination (>95% after 15 min of treatment). MMO/PMS promoted the opening and oxidation of the piperazyl ring, plus the hydroxylation of the quinolone moiety on CIP, which potentially decreased the biological activity. After three reuse cycles, the MMO still presented with a high activation of PMS toward CIP degradation (90% in 15 min of action). Additionally, the CIP degradation by the MMO/PMS system in simulated hospital wastewater was close to that obtained in distilled water. This work provides relevant information on the stability of Co-, Cu-, and Cr-based materials under interaction with PMS and the strategies to obtain a proper catalyst to degrade CIP.

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Section: Reaction Systems For Pollutant Removalmentioning

confidence: 99%

Materials Based on Co, Cu, and Cr as Activators of PMS for Degrading a Representative Antibiotic—The Strategy for Utilization in Water Treatment and Warnings on Metal Leaching

et al. 2023

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“…Co 2+ has shown superior PMS activation efficiency in homogeneous reactions, 16 but the performance of transition metal ions in PMS activation is affected by water system pH, and their homogeneous catalytic use poses recovery challenges, potentially leading to secondary water pollution. 17,18 Heterogeneous catalysts, such as Co 3 O 4 , are more suitable for large-scale wastewater treatment, evidenced by their effective activation of PMS for 2,4-dichlorophenol degradation and reduced metal ion concentration in effluent. 19 Other transition metals and metal oxides, including manganese, 20 iron, 21,22 nickel, 23 copper, 24 have also been explored for PMS activation.…”

Section: Introductionmentioning

confidence: 99%

“…SO 4 •– are typically derived from peroxymonosulfate (PMS) and peroxydisulfate (PDS) with PMS activating more readily due to its asymmetric structure and longer O–O bond compared to PDS. , Various PMS activation methods have been demonstrated, including ultrasonic, thermal, alkali, UV radiation, transition metals, and carbon materials activation. − However, external energy activation encounters practical limitations due to the extra energy input required, which increases water treatment costs. Co 2+ has shown superior PMS activation efficiency in homogeneous reactions, but the performance of transition metal ions in PMS activation is affected by water system pH, and their homogeneous catalytic use poses recovery challenges, potentially leading to secondary water pollution. , Heterogeneous catalysts, such as Co 3 O 4 , are more suitable for large-scale wastewater treatment, evidenced by their effective activation of PMS for 2,4-dichlorophenol degradation and reduced metal ion concentration in effluent . Other transition metals and metal oxides, including manganese, iron, , nickel, and copper, have also been explored for PMS activation.…”

Section: Introductionmentioning

confidence: 99%

N-Doped Co–Mn/C Dual Metal Oxide as an Activator of Peroxymonosulfate Considering Radical and Nonradical Pathways

Sun,

Li,

et al. 2024

ACS Appl. Nano Mater.

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The Mn–Co dual-metal oxide is recognized as an effective activator for peroxymonosulfate (PMS), but its activation mechanism remains controversial. In this study, a Co/Mn–C–N (CMCN) nanocatalyst was synthesized using a simple pyrolysis method, and its catalytic activity along with the PMS activation mechanism was comprehensively explored. The findings indicated that the synergistic effect of Mn and Co within the bimetallic composition significantly enhanced the catalytic efficiency of CMCN compared to those of individual metal oxides (Mn–C–N and Co–C–N). Bisphenol A underwent successful degradation within 3 min in a neutral environment, with a degradation kinetic rate of 1.59 min–1 and a total organic carbon removal efficiency of 63.8%. Moreover, CMCN nanoparticles demonstrated remarkable stability and reusability, maintaining their efficacy over four cycles. Employing a series of experiments and analytical characterizations, a novel activation mechanism for PMS was proposed, involving both radical and nonradical pathways. This mechanism involves the oxidation of organic pollutants through a direct electron transfer process from metastable intermediate complexes. Notably, the CMCN/PMS system exhibited a robust resistance to interference factors. This research provides novel insights into the development of bimetallic oxide composites for the effective removal of recalcitrant water pollutants.

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“…1 O 2 in the PS/CG system, H 2 O solvent was replaced with D 2 O. On account of the deuterium solvent isotope effect, 1 O 2 lives 13 times longer in D 2 O (B55 ms) than in H 2 O (4.2 ms),63,64 which would improve the pollutant degradation by 1 O 2 . As shown in Fig.S4, ESI, † the TC degradation efficiency in D 2 O was significantly higher than that in H 2 O, further suggesting that 1 O 2 was involved in the TC degradation process.…”

mentioning

confidence: 99%

Natural coal gangue as a stable catalyst to activate persulfate: tetracycline hydrochloride degradation and its explored mechanism

et al. 2023

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Efficient peroxymonosulfate activation and less metallic leaching through kaolin@MnCo2O4 for bisphenol A degradation in environmental remediation

Cited by 23 publications

References 57 publications

Materials Based on Co, Cu, and Cr as Activators of PMS for Degrading a Representative Antibiotic—The Strategy for Utilization in Water Treatment and Warnings on Metal Leaching

Materials Based on Co, Cu, and Cr as Activators of PMS for Degrading a Representative Antibiotic—The Strategy for Utilization in Water Treatment and Warnings on Metal Leaching

N-Doped Co–Mn/C Dual Metal Oxide as an Activator of Peroxymonosulfate Considering Radical and Nonradical Pathways

Natural coal gangue as a stable catalyst to activate persulfate: tetracycline hydrochloride degradation and its explored mechanism

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