Unrecognized role of bisulfite as Mn(III) stabilizing agent in activating permanganate (Mn(VII)) for enhanced degradation of organic contaminants

Gao, Yuan; Jiang, Jin; Zhou, Yang; Pang, Shengyong; Ma, Jun; Jiang, Chengchun; Wang, Zhen; Wang, Panxin; Wang, Lihong; Li, Juan

doi:10.1016/j.cej.2017.06.056

Cited by 73 publications

(37 citation statements)

References 31 publications

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“…To further prove the generation of Mn(III), PP was added into the E-PM-Mn 2+ process. Since the Mn(III)-PP complex had a lower reactivity on contaminant degradation compared with the free reactive Mn(III) aq or the Mn(III)-sulfito complex, ,− if Mn(III) was the primary oxidant, the addition of excess PP would significantly inhibit the degradation of DCF in the E-PM-Mn 2+ process due to the formation of the Mn(III)-PP complex. Obviously, as illustrated in Figure S7, the degradation of DCF decreased significantly as the concentration of PP increased from 20 μM to 10 mM.…”

Section: Results and Discussionmentioning

confidence: 99%

Generation of Active Mn(III)_aq by a Novel Heterogeneous Electro-permanganate Process with Manganese(II) as Promoter and Stabilizer

Zhu

Wang

Zhang

et al. 2019

Environ. Sci. Technol.

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Our study on the synergetic effect of electrolysis and permanganate (E-PM) revealed a novel alternative method for generating active Mn(III)aq heterogeneously by electrochemically activating PM with Mn2+ as promoter and stabilizer. We systematically explored the generation mechanism of Mn(III)aq. It indicated that all three components (electrolysis + PM + Mn2+) were necessary to facilitate the generation of active Mn(III) in the E-PM-Mn2+ process. It was worth noting that Mn2+, as essential promoter and Mn(III)aq stabilizer, could considerably enhance the concentration of Mn(III) in the E-PM-Mn2+ process. Further study revealed that the active Mn(III) was mainly produced on cathode rather than in aqueous solution or on anode. In addition, the soluble Mn(III)aq generated in the E-PM-Mn2+ process was demonstrated to be very efficient for the degradation and mineralization of diclofenac (DCF) as well as methyl blue, carbamazepine, phenol, sulfamethoxazole, and nitrobenzene. Moreover, the effects of the main operating parameters (Mn2+ dosage, PM dosage, applied current density, pH of solution, and contaminant concentration) and different water matrices on the E-PM-Mn2+ process were investigated systematically. Possible degradation pathways of DCF in the E-PM-Mn2+ process were also proposed. The results demonstrated that the E-PM-Mn2+ system based on active Mn(III)aq could create a more efficient, sustainable, and less energy costing technology for water treatment.

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Section: Results and Discussionmentioning

confidence: 99%

Generation of Active Mn(III)_aq by a Novel Heterogeneous Electro-permanganate Process with Manganese(II) as Promoter and Stabilizer

Zhu

Wang

Zhang

et al. 2019

Environ. Sci. Technol.

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“…However, PM+C/S and Cl 2 +C/S showed a limited removal of CBZ, BPS, and ACE (<10.0%). The secondary reaction rate constants of KMnO 4 and hypochlorous acid with CBZ, BPS, and ACE are reported to be slow (10 −4~1 0 2 M −1 •s −1 , [48][49][50][51][52]). Based on the dosage of KMnO 4 and NaClO, their apparent rate constants were calculated to be on the order of 10 −9 -10 −3 s −1 .…”

Section: Discussionmentioning

confidence: 99%

Enhanced Coagulation with Mn(III) Pre-Oxidation for Treatment of Micro-Polluted Raw Water

Yan

Sun

Wang

et al. 2019

Water

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Mn(III) oxidation technology has attracted increasing interest in recent years because of its fast decontamination kinetics and second-pollution-free characteristic. Whether it can be used as a pre-oxidation step to enhance conventional coagulation process remains to be evaluated. Herein, an Fe-coagulation/sedimentation process combined with Mn(III) pre-oxidation (Mn(III)+C/S), hypochlorite pre-oxidation (Cl2+C/S), and permanganate pre-oxidation (PM+C/S) was applied to treat simulated micro-polluted raw water. The removal performance of routine water quality indices (turbidity, dissolved organic carbon, total nitrogen, nitrate-nitrogen, ammonia-nitrogen, Pb(II), and Cr(VI)) and the emerging pollutants (acesulfame, carbamazepine, bisphenol S, and nano-ZnO) created by these three processes were researched. The mechanism of how Mn(III) pre-oxidation influences C/S was explored by identifying the transformation products of Mn(III), measuring the timely variation of flocs’ zeta potential and size, and scanning flocs’ micromorphology. Compared to Cl2+C/S and PM+C/S, Mn(III)+C/S exhibited its superiority in removing dissolved organic carbon (72.9%), total nitrogen (31.74%), and emerging pollutants (21.78%–93.49%). The enhanced removal of these contaminants by Mn(III)+C/S found its explanation in the strong oxidation power of Mn(III) and the multiple roles of in-situ formed MnO2 (e.g., flocculation core, adsorption co-precipitant, and densification agent). The acute toxicity tests confirmed that water treated by Mn(III)+C/S did not show a significant change in the associated toxicity. The findings of the present study indicate that Mn(III) oxidation technology shows great potential as an alternative to pre-oxidation technology of waterworks.

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“…A reference was found that showed that the hydrate sulfite bisulfite ( 3 HSO − ) could react with permanganate to stabilize the formation of the strong oxidizer Mn 3+ . 20 These reactions were studied at neutral to acidic pH where bisulfite can be formed from sulfite, so there should not be any effect on quenching highly caustic samples. Nonetheless, the stability of quenched samples was examined to rule out any unwanted effects.…”

Section: Sampling and Analysismentioning

confidence: 99%

“…The final Mn product is MnO2, thus giving an overall stoichiometric coefficient on permanganate of 4/3 rather than the value of 4 observed in the Reagent and dilute SRAT product tests. In this scheme below, the relatively high amount of Mn 2+ present from the SRAT product is used to generate the powerful oxidant 20,26 Mn 3+ from the manganate or directly from permanganate.…”

Section: Possible Reactions In the Presence Of Sludgementioning

confidence: 99%

Permanganate Oxidation of Defense Waste Processing Facility (DWPF) Recycle Collection Tank (RCT) Simulants – Protocol Runs for Nominal and Chemical Process Cell (CPC) Foamover Conditions

Zamecnik

Riley

Ramsey

2019

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Thanks to the personnel in the laboratories that supported these tests including Whitney Riley, Kandice Miles, and Kim Wyszynski in the Process Science Analytical Laboratory and Tom White in SRNL's Analytical Development. Thanks to Bill Holtzscheiter, Grace Chen, Stephanie Harrington, and Christie Sudduth for their support in planning these experiments. Jack Zamecnik thanks Dan Lambert and Matt Siegfried for completing this report upon his retirement from SRNL.

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Unrecognized role of bisulfite as Mn(III) stabilizing agent in activating permanganate (Mn(VII)) for enhanced degradation of organic contaminants

Cited by 73 publications

References 31 publications

Generation of Active Mn(III)_aq by a Novel Heterogeneous Electro-permanganate Process with Manganese(II) as Promoter and Stabilizer

Generation of Active Mn(III)_aq by a Novel Heterogeneous Electro-permanganate Process with Manganese(II) as Promoter and Stabilizer

Enhanced Coagulation with Mn(III) Pre-Oxidation for Treatment of Micro-Polluted Raw Water

Permanganate Oxidation of Defense Waste Processing Facility (DWPF) Recycle Collection Tank (RCT) Simulants – Protocol Runs for Nominal and Chemical Process Cell (CPC) Foamover Conditions

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Unrecognized role of bisulfite as Mn(III) stabilizing agent in activating permanganate (Mn(VII)) for enhanced degradation of organic contaminants

Cited by 73 publications

References 31 publications

Generation of Active Mn(III)aq by a Novel Heterogeneous Electro-permanganate Process with Manganese(II) as Promoter and Stabilizer

Generation of Active Mn(III)aq by a Novel Heterogeneous Electro-permanganate Process with Manganese(II) as Promoter and Stabilizer

Enhanced Coagulation with Mn(III) Pre-Oxidation for Treatment of Micro-Polluted Raw Water

Permanganate Oxidation of Defense Waste Processing Facility (DWPF) Recycle Collection Tank (RCT) Simulants – Protocol Runs for Nominal and Chemical Process Cell (CPC) Foamover Conditions

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Generation of Active Mn(III)_aq by a Novel Heterogeneous Electro-permanganate Process with Manganese(II) as Promoter and Stabilizer

Generation of Active Mn(III)_aq by a Novel Heterogeneous Electro-permanganate Process with Manganese(II) as Promoter and Stabilizer