Elimination of methyl mercaptan in ZVI-S 2 O 8 2− system activated with in-situ generated ferrous ions from zero valent iron

Zeng, Jiawei; Hu, Lingling; Tan, Xiuqin; He, Chun; He, Zhuoyan; Pan, Wenqi; Hou, Yaohua; Shu, Dong

doi:10.1016/j.cattod.2016.06.024

Cited by 26 publications

(14 citation statements)

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“…Aer the reaction was completed, the ZVI surface was obviously corroded. 15,28 It has also been reported that ZVI can react with PS directly in the PS-based solution, as shown in eqn (10):…”

Section: Efficiency Of Co-activation By Zvi and Fe 2+mentioning

confidence: 97%

“…13,14 In the PS-based system, with the addition of ZVI, since ZVI can continuously release the right amount of ferrous ions, the quenching effect of excess ferrous ions on persulfate radicals can be alleviated. 10,15 However, the reaction rate is too slow to remove Qu from a large amount of engineering wastewater. 16 The slow reaction rate can be attributed to two causes.…”

Section: Introductionmentioning

confidence: 99%

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A study on the mechanism of oxidized quinoline removal from acid solutions based on persulfate–iron systems

et al. 2020

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Section: Efficiency Of Co-activation By Zvi and Fe 2+mentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

A study on the mechanism of oxidized quinoline removal from acid solutions based on persulfate–iron systems

et al. 2020

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“…Also, some of the sulfur compounds are an antifungal agent in the phosphate fertilizer generation process 7 . Sulfur compounds are responsible for short-lived environmental perturbations through the formation of aerosols that cause climate change 8 .…”

Section: Introductionmentioning

confidence: 99%

Atmospheric reaction of methyl mercaptan with hydroxyl radical as an acid rain primary agent

Douroudgari

Vahedpour

Mohammadi

2020

Sci Rep

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For the CH3SH + OH atmospheric reaction, we study the mechanism, potential energy surface, thermodynamic parameters of all stationary points, and rate of generation of the main product channels at high, low, and intermediate pressures. In this study, the UMP2, UM062X, UB3LYP, and CCSD(T) methods by Dunning and Pople basis sets are used and the results are compared with the experimental data. It is theoretically predicted that the reaction has fourteen possible pathways with eight different products in the gas phase. The thermodynamic results show that OH radical extracts predominantly the hydrogen of the SH functional group compared to the hydrogen of the CH3 group of CH3SH. Also, the rate constant calculations indicate that the extraction of the hydrogen atom of the SH group has a major role in 150–3000 K, while a good contribution is observed for the hydrogen of methyl group above 1200 K. Our results show that the used methods lead to good agreement with experiment. Finally, we demonstrated that why the main path is the main path.

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“…2 The presence of 5 ppm CH 3 SH in the atmosphere will give us an unpleasant feeling, while the exposure of a high concentration of CH 3 SH can cause significant poisoning. 3 Till now, many conventional technologies for eliminating odorous VOCs have been widely applied, including adsorption, biological treatment, incineration, and plasma technology, but they may not suitable for CH 3 SH from industrial activities with the concentrations ranging from a few ppb to tens of thousands. 4−8 Currently, the catalytic conversion process (including catalytic oxidation, catalytic decomposition) that does not need any additional reagents (e.g., H 2 , O 2 ) and produces low waste (e.g., H 2 S and inorganic hydrocarbons) is considered as a suitable technique for the complete removal of CH 3 SH.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Performance and Conversion Pathway for Catalytic Ozonation of Methyl Mercaptan on Single-Atom Ag Deposited Three-Dimensional Ordered Mesoporous MnO₂

Xia

Wang

et al. 2018

Environ. Sci. Technol.

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159

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In this study, Ag deposited three-dimensional MnO 2 porous hollow microspheres (Ag/MnO 2 PHMSs) with high dispersion of the atom level Ag species are first prepared by a novel method of redox precipitation. Due to the highly efficient utilization of downsized Ag nanoparticles, the optimal 0.3% Ag/MnO 2 PHMSs can completely degrade 70 ppm CH 3 SH within 600 s, much higher than that of MnO 2 PHMSs (79%). Additionally, the catalyst retains longterm stability and can be regenerated to its initial activity through regeneration with ethanol and HCl. The results of characterization of Ag/MnO 2 PHMSs and catalytic performance tests clearly demonstrate that the proper amount of Ag incorporation not only facilitates the chemi-adsorption but also induces more formation of vacancy oxygen (O v ) and lattice oxygen (O L ) in MnO 2 as well as Ag species as activation sites to collectively favor the catalytic ozonation of CH 3 SH. Ag/MnO 2 PHMSs can efficiently transform CH 3 SH into CH 3 SAg/CH 3 S-SCH 3 and then oxidize them into SO 4 2− and CO 2 as evidenced by in situ diffuse reflectance infrared Fourier transform spectroscopy. Meanwhile, electron paramagnetic resonance and scavenger tests indicate that •OH and 1 O 2 are the primary reactive species rather than surface atomic oxygen species contributing to CH 3 SH removal over Ag/MnO 2 PHMSs. This work presents an efficient catalyst of single atom Ag incorporated MnO 2 PHMSs to control air pollution.

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Elimination of methyl mercaptan in ZVI-S 2 O 8 2− system activated with in-situ generated ferrous ions from zero valent iron

Cited by 26 publications

References 26 publications

A study on the mechanism of oxidized quinoline removal from acid solutions based on persulfate–iron systems

A study on the mechanism of oxidized quinoline removal from acid solutions based on persulfate–iron systems

Atmospheric reaction of methyl mercaptan with hydroxyl radical as an acid rain primary agent

Enhanced Performance and Conversion Pathway for Catalytic Ozonation of Methyl Mercaptan on Single-Atom Ag Deposited Three-Dimensional Ordered Mesoporous MnO₂

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Elimination of methyl mercaptan in ZVI-S 2 O 8 2− system activated with in-situ generated ferrous ions from zero valent iron

Cited by 26 publications

References 26 publications

A study on the mechanism of oxidized quinoline removal from acid solutions based on persulfate–iron systems

A study on the mechanism of oxidized quinoline removal from acid solutions based on persulfate–iron systems

Atmospheric reaction of methyl mercaptan with hydroxyl radical as an acid rain primary agent

Enhanced Performance and Conversion Pathway for Catalytic Ozonation of Methyl Mercaptan on Single-Atom Ag Deposited Three-Dimensional Ordered Mesoporous MnO2

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Product

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Enhanced Performance and Conversion Pathway for Catalytic Ozonation of Methyl Mercaptan on Single-Atom Ag Deposited Three-Dimensional Ordered Mesoporous MnO₂