Degradation of 1,4-dioxane by biochar supported nano magnetite particles activating persulfate

Ouyang, Da; Yan, Jingchun; Qian, Linbo; Chen, Yun; Han, Lu; Su, Anqi; Zhang, Wenying; Hao, Ni; Chen, Mengfang

doi:10.1016/j.chemosphere.2017.05.156

Cited by 249 publications

(42 citation statements)

References 42 publications

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“…EPR studies were carried out to verify the catalytic oxidation mechanism and identify the reactive species of EG/PDS system for AR97 degradation. As shown in Figure 7, the signals of DMPO-OH and DMPO-SO4 were clearly seen [61], and the radicals oxidation mechanism was further confirmed. Ten minutes after the reaction began, the intensities of radical peaks reached their maximum.…”

Section: Electron Paramagnetic Resonance (Epr) Studiesmentioning

confidence: 56%

Preparation and Catalytic Performance of Expanded Graphite for Oxidation of Organic Pollutant

Lan

2019

Catalysts

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A classic carbon material—expanded graphite (EG), was prepared and proposed for a new application as catalysts for activating peroxydisulfate (PDS). EG samples prepared at different expansion temperatures were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and other methods. It was observed that there existed a remarkable synergistic effect in the EG/PDS combined system to degrade Acid Red 97 (AR97). Unlike other carbon material catalysts, sp2 carbon structure may be the main active site in the catalytic reaction. The EG sample treated at 600 °C demonstrated the best catalytic activity for the activation of PDS. Degradation efficiency of AR97 increased with raising PDS dosage and EG loadings. The pH of aqueous solution played an important role in degradation and adsorption, and near-neutrality was the optimal pH in this research. It was assumed that the radical pathway played a dominant role in AR97 degradation and that oxidation of AR97 occurred in the pores and interface layer on the external surface of EG by SO4·− and ·OH, generated on or near the surface of EG. The radical oxidation mechanism was further confirmed by electron paramagnetic resonance spectroscopy. The EG sample could be regenerated by annealing, and the catalytic ability was almost fully recovered.

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Section: Electron Paramagnetic Resonance (Epr) Studiesmentioning

confidence: 56%

Preparation and Catalytic Performance of Expanded Graphite for Oxidation of Organic Pollutant

Lan

2019

Catalysts

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“…31 Furthermore, the peaks at 468 cm À1 and 521 cm À1 were observed on Fe-O of Fe 2 O 3 and Fe 3 O 4 , indicating that Fe compounds existed in the adsorbents. 32 These results and XRD analysis demonstrated that ZVI could be successfully loaded onto the surface of ZVI@GRM.…”

Section: Resultsmentioning

confidence: 72%

Fabrication of a low-cost adsorbent supported zero-valent iron by using red mud for removing Pb(ii) and Cr(vi) from aqueous solutions

Dai

Cao

et al. 2019

RSC Adv.

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“…As shown in Figure 5, two peaks around 1504 and 1350 cm −1 that are assigned to C = O stretching vibration of -COOH group and single-and doublebond species of -OH groups appeared in both SDBC and Mn-SDBC, respectively [21]. Previous work reported that, by releasing proton, functional groups such as C-OH and -COOH transformed into CO Á and COO Á and activated PS to generate sulfate free radicals [22]. The peak disappeared after the reaction, which indicates those functional groups also contributed to the PS activation reaction.…”

Section: Characterizationmentioning

confidence: 91%

Activation of persulfate by manganese oxide-modified sludge-derived biochar to degrade Orange G in aqueous solution

Fan

Zhang

et al. 2019

Environmental Pollutants and Bioavailability

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Manganese oxide-loaded sludge-derived biochar (Mn-SDBC) was synthesized and used to activate persulfate (PS) for Orange G (OG) degradation. X-ray fluorescence and Fourier transform infrared spectroscopy analysis indicated that the manganese oxides were successfully loaded on the SDBC. The result of batch experiments suggests that OG can be efficiently degraded by PS activated by Mn-SDBC. Metal loading rate, biochar dosage and PS concentration play a crucial role in experiments, whereas pH has a minor effect on OG removal. The free radical quenching experiment was investigated to determine the predominant radical species, and the activation mechanism was also illustrated. The as-synthesized Mn-SDBC can efficiently activate PS and removal OG under a continuous flow condition in a fixed-bed column. Our study suggests that Mn-SDBC would be a promising catalyst for the remediation of dye-contaminated wastewater.

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Degradation of 1,4-dioxane by biochar supported nano magnetite particles activating persulfate

Cited by 249 publications

References 42 publications

Preparation and Catalytic Performance of Expanded Graphite for Oxidation of Organic Pollutant

Preparation and Catalytic Performance of Expanded Graphite for Oxidation of Organic Pollutant

Fabrication of a low-cost adsorbent supported zero-valent iron by using red mud for removing Pb(ii) and Cr(vi) from aqueous solutions

Activation of persulfate by manganese oxide-modified sludge-derived biochar to degrade Orange G in aqueous solution

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