Enhanced degradation of 2,4-dinitrotoluene in groundwater by persulfate activated using iron–carbon micro-electrolysis

Ma, Zhifei; Yang, Yu; Jiang, Yonghai; Xi, Beidou; Yang, Tianxue; Peng, Xing; Lian, Xinying; Yan, Kun; Liu, Hongliang

doi:10.1016/j.cej.2016.11.083

Cited by 78 publications

(17 citation statements)

References 39 publications

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“…It is known that SO 4 -• is the dominant active free radical in aqueous acidic phases. Thus, the pH of the system has a marked effect on the activity of PS, as SO 4 −• is the main active species at lower pH levels and has a greater oxidizing capacity than that of • OH [32]. Therefore, more SO 4 −• radicals are generated by the Fe 2+ ions through the activation of PS.…”

Section: Catalytic Activity Of Fe 3 O 4 -Wb With Respect To Pah Reducmentioning

confidence: 99%

Wood-Biochar-Supported Magnetite Nanoparticles for Remediation of PAH-Contaminated Estuary Sediment

et al. 2018

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Abstract:In this study, we investigated the ability of a magnetic wood biochar (WB)-based composite catalyst (Fe 3 O 4 -WB) to catalyze sodium persulfate (PS) for the remediation of estuary sediment contaminated with polycyclic aromatic hydrocarbons (PAHs). The effects of various critical parameters, including the catalyst dose and initial pH, were investigated. The degradation of the PAHs was found to be related to the number of rings in their structure. The results showed that Fe 3 O 4 -WB is an efficient catalyst for the removal of high-ring PAHs (HPAHs), with the highest degradation rates for the 6-, 5-, and 4-ringed PAHs being 90%, 84%, and 87%, respectively, for a PS concentration of 2 × 10 −5 M, catalyst concentration of 3.33 g/L, and pH of 3.0. That the reduction rate of the HPAHs was greater than that of the low-ring PAHs can be attributed to the strong affinity of the HPAHs for biochar derived from wood biomass. Overall, this study revealed that the WB-mediated electron transfer catalysis of the surface functional groups in a wide range of pH in the Fe 3 O 4 -WB/PS system and potentially application in the remediation of sediments contaminated with PAHs.

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Section: Catalytic Activity Of Fe 3 O 4 -Wb With Respect To Pah Reducmentioning

confidence: 99%

Wood-Biochar-Supported Magnetite Nanoparticles for Remediation of PAH-Contaminated Estuary Sediment

et al. 2018

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“…When we added FeCG alone, IBU was removed by the Fe/C micro-electrolysis reaction, which was not very efficient in this study. The release of iron ions for FeCG with or without PDS during the reaction is shown in Figure S1 in the Supporting Information, more iron ion released in the system of FeCG + PDS than FeCG alone, the PDS in the solution could react with Fe 0 to release iron ion. , At the same time, iron ion activates PDS to generate SO 4 •– , which could further generate • OH in the studied solution system . SO 4 •– and • OH could degrade IBU in the solution together .…”

Section: Resultsmentioning

confidence: 95%

Removal of Ibuprofen by Using a Novel Fe/C Granule-Induced Heterogeneous Persulfate System at near Neutral pH

Cui

Wang

et al. 2019

Ind. Eng. Chem. Res.

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In this study, novel Fe/C granules (FeCGs) were successfully prepared at room temperature by embedding iron filings and hydrothermal carbonization biochar in sodium alginate. The removal rate of ibuprofen (IBU) by the composite system of sodium persulfate and FeCG was 96.81%, and the removal rate of total organic carbon was 68.41% near neutral pH. The core–shell structure was stable and almost unchanged after use. Eight intermediates were detected in the degradation process, from which the degradation pathway of IBU was proposed. The results of the reusability and stability test showed that the removal rate of IBU was stable under the condition of poor water mobility. This study provides an alternative method to the treatment of contaminants in drugs and personal care products. The main finding of the work is to develop a novel core–shell structure FeCG and predict the pathway for IBU removal by FeCG reacting with peroxydisulfate.

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“…Therefore, the primary battery system formed by Fe and AC aided the activation of PDS for the removal of CTC and accelerated the degradation efficiency. This phenomenon might be due to the presence of an ACpromoted electron transfer in the system, accelerating the formation of Fe 2+ to generate SO 4 À c. 30 Furthermore, some studies have shown that current can promote the activation of persulfate. The results showed that the Fe 0 -AC microelectrolysis system could generate more oxidation radicals by activating PDS, which was more conducive to the removal of CTC.…”

Section: Removal Of Ctc In Different Systemsmentioning

confidence: 99%

Zero-valent iron/activated carbon microelectrolysis to activate peroxydisulfate for efficient degradation of chlortetracycline in aqueous solution

Xiao

2020

RSC Adv.

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Enhanced degradation of 2,4-dinitrotoluene in groundwater by persulfate activated using iron–carbon micro-electrolysis

Cited by 78 publications

References 39 publications

Wood-Biochar-Supported Magnetite Nanoparticles for Remediation of PAH-Contaminated Estuary Sediment

Wood-Biochar-Supported Magnetite Nanoparticles for Remediation of PAH-Contaminated Estuary Sediment

Removal of Ibuprofen by Using a Novel Fe/C Granule-Induced Heterogeneous Persulfate System at near Neutral pH

Zero-valent iron/activated carbon microelectrolysis to activate peroxydisulfate for efficient degradation of chlortetracycline in aqueous solution

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