Removal of volatile dimethyl sulfoxide from wastewater using hydrogen peroxide catalyzed by supported molybdenum oxide

Yan, Fei; Guo, Xiaohan; Ye, Qingying; Li, Ping; Qi, Juanjuan; Wang, Lidong

doi:10.1016/j.seppur.2022.121108

Cited by 4 publications

(3 citation statements)

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“…Dimethyl sulfoxide is easily reduced to dimethyl sulfide; both compounds are odorous volatile organic sulfides, which can lead to an odor problem that greatly affects the local population [5,7]. Therefore, it is favorable for dimethyl sulfoxide to be degraded to DMSO 2 , a more environmentally friendly and biodegradable compound [8]. DMSO 2 is an organosulfur compound and serves as a source of sulfur for microorganisms [9].…”

Section: Introductionmentioning

confidence: 99%

Reaction mechanism and kinetics of the two‐component flavoprotein dimethyl sulfone monooxygenase system: Using hydrogen peroxide for monooxygenation and substrate cleavage

Mangkalee,

Oonanant,

Aonbangkhen

et al. 2023

The FEBS Journal

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The dimethyl sulfone monooxygenase system is a two‐component flavoprotein, catalyzing the monooxygenation of dimethyl sulfone (DMSO2) by oxidative cleavage producing methanesulfinate and formaldehyde. The reductase component (DMSR) is a flavoprotein with FMN as a cofactor, catalyzing flavin reduction using NADH. The monooxygenase (DMSMO) uses reduced flavin from the reductase and oxygen for substrate monooxygenation. DMSMO can bind to FMN and FMNH− with a Kd of 17.4 ± 0.9 μm and 4.08 ± 0.8 μm, respectively. The binding of FMN to DMSMO is required prior to binding DMSO2. This also applies to the fast binding of reduced FMN to DMSMO followed by DMSO2. Substituting reduced DMSR with FMNH− demonstrated the same oxidation kinetics, indicating that FMNH− from DMSR was transferred to DMSMO. The oxidation of FMNH−:DMSMO, with and without DMSO2 did not generate any flavin adducts for monooxygenation. Therefore, H2O2 is likely to be the reactive agent to attack the substrate. The H2O2 assay results demonstrated production of H2O2 from the oxidation of FMNH−:DMSMO, whereas H2O2 was not detected in the presence of DMSO2, confirming H2O2 utilization. The rate constant for methanesulfinate formation determined from rapid quenched flow and the rate constant for flavin oxidation were similar, indicating that H2O2 rapidly reacts with DMSO2, with flavin oxidation as the rate‐limiting step. This is the first report of the kinetic mechanisms of both components using rapid kinetics and of a method for methanesulfinate detection using LC–MS.

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Section: Introductionmentioning

confidence: 99%

Reaction mechanism and kinetics of the two‐component flavoprotein dimethyl sulfone monooxygenase system: Using hydrogen peroxide for monooxygenation and substrate cleavage

Mangkalee,

Oonanant,

Aonbangkhen

et al. 2023

The FEBS Journal

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“…The efficiency of this strategy in dealing with DMSO-containing wastewater has been demonstrated by Hulea et al using tungstate-intercalated layered double hydroxides (W-LDH) and titanium silicalite (TS-1) with H 2 O 2 as the oxidant. Recently, we reported that DMSO was effectively removed from water using H 2 O 2 as the oxidant over a MoO 3 /SiO 2 catalyst at elevated temperatures . However, the development of robust and low-cost catalysts remains a challenge for the oxidation of DMSO in wastewater.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, we reported that DMSO was effectively removed from water using H 2 O 2 as the oxidant over a MoO 3 /SiO 2 catalyst at elevated temperatures. 17 However, the development of robust and low-cost catalysts remains a challenge for the oxidation of DMSO in wastewater.…”

Section: Introductionmentioning

confidence: 99%

Boosting H₂O₂ Activation for the Efficient Degradation of Dimethyl Sulfoxide-Containing Wastewater over Supported Niobia Catalysts

Wang

Guo

et al. 2022

Ind. Eng. Chem. Res.

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Dimethyl sulfoxide (DMSO) is a widely used solvent in many industries. The biodegradation of DMSO is difficult, resulting in large amounts volatile and noxious compounds emitted into the atmosphere, including dimethylsulfide, methyl mercaptan, and H2S. Therefore, it is necessary to deal with DMSO-containing wastewater using chemical methods. Here, supported niobia catalysts were prepared and characterized, and their catalytic performances was evaluated by the oxidative degradation of DMSO via H2O2 activation. The product of DMSO oxidation is dimethylsulfone which is a biodegradable and environmentally benign compound. The most active catalyst, 20%Nb2O5/SiO2, can remove 178.6 mmol/L DMSO within 2 h at 25 °C following a pseudo-first-order reaction. EPR spectroscopic studies and scavenging experiments confirms that O2 •– and 1O2 are the active species for DMSO degradation. Although the catalytic activity of Nb2O5/SiO2 drops significantly after use, its reusability improved conspicuously after calcination, and the catalyst can be reused for 5 times with an 82.2% DMSO conversion.

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Investigating semibatch oxidation reaction of dimethyl sulfoxide with hydrogen peroxide: Thermal analysis and process optimization

Chen,

Xu,

et al. 2023

Journal of Loss Prevention in the Process Industries

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Removal of volatile dimethyl sulfoxide from wastewater using hydrogen peroxide catalyzed by supported molybdenum oxide

Cited by 4 publications

References 35 publications

Reaction mechanism and kinetics of the two‐component flavoprotein dimethyl sulfone monooxygenase system: Using hydrogen peroxide for monooxygenation and substrate cleavage

Reaction mechanism and kinetics of the two‐component flavoprotein dimethyl sulfone monooxygenase system: Using hydrogen peroxide for monooxygenation and substrate cleavage

Boosting H₂O₂ Activation for the Efficient Degradation of Dimethyl Sulfoxide-Containing Wastewater over Supported Niobia Catalysts

Investigating semibatch oxidation reaction of dimethyl sulfoxide with hydrogen peroxide: Thermal analysis and process optimization

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Removal of volatile dimethyl sulfoxide from wastewater using hydrogen peroxide catalyzed by supported molybdenum oxide

Cited by 4 publications

References 35 publications

Reaction mechanism and kinetics of the two‐component flavoprotein dimethyl sulfone monooxygenase system: Using hydrogen peroxide for monooxygenation and substrate cleavage

Reaction mechanism and kinetics of the two‐component flavoprotein dimethyl sulfone monooxygenase system: Using hydrogen peroxide for monooxygenation and substrate cleavage

Boosting H2O2 Activation for the Efficient Degradation of Dimethyl Sulfoxide-Containing Wastewater over Supported Niobia Catalysts

Investigating semibatch oxidation reaction of dimethyl sulfoxide with hydrogen peroxide: Thermal analysis and process optimization

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Boosting H₂O₂ Activation for the Efficient Degradation of Dimethyl Sulfoxide-Containing Wastewater over Supported Niobia Catalysts