A study on removal of elemental mercury in flue gas using fenton solution

Liu, Yangxian; Wang, Yan; Wang, Qian; Pan, Jianfeng; Zhang, Yongchun; Zhou, Jianfei; Zhang, Jun

doi:10.1016/j.jhazmat.2015.03.027

Cited by 76 publications

(27 citation statements)

References 28 publications

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“…However, Hg 0 is extremely hard to be captured as a result of its extremely low water solubility and high volatility at room temperature . To control Hg 0 pollution, various Hg 0 purification technologies, consisting of catalytic oxidation, adsorption removal, chemical oxidation, etc., have been developed. Based on different oxidants and oxidation principles, Hg 0 chemical oxidation technologies can be further divided between conventional oxidation and free radical advanced oxidation …”

Section: Introductionmentioning

confidence: 99%

Gaseous Elemental Mercury Removal Using Combined Metal Ions and Heat Activated Peroxymonosulfate/H₂O₂ Solutions

Liu

Wang

2018

AIChE Journal

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in Wiley Online Library (wileyonlinelibrary.com)Several novel oxidation removal processes of elemental mercury (Hg 0 ) from flue gas using combined Fe 2+ /Mn 2+ and heat activated peroxymonosulfate (PMS)/H 2 O 2 solutions in a bubbling reactor were proposed. The operating parameters (e.g., PMS/H 2 O 2 concentration, Fe 2+ /Mn 2+ concentration, solution pH, activation temperature, and Hg 0 /NO/SO 2 /O 2 / CO 2 concentration), mechanism and mass transfer-reaction kinetics of Hg 0 removal were investigated. The results show that heat and Fe 2+ /Mn 2+ have significant synergistic effect for activating PMS and PMS/H 2 O 2 to produce free radicals to oxidize Hg 0 . Hg 0 removal is strongly affected by PMS/H 2 O 2 concentration, Fe 2+ /Mn 2+ concentration, activation temperature, and solution pH. SO − 4 · and ·OH produced from combined heat and Fe 2+ /Mn 2+ activated PMS/H 2 O 2 play a leading role in Hg 0 removal. Under optimized experimental conditions, Hg 0 removal efficiencies reach 100, 94.9, 66.9, and 58.9% in heat/Fe 2+ /PMS/H 2 O 2 , heat/Mn 2+ /PMS/H 2 O 2 , heat/Fe 2+ /PMS, and heat/Mn 2+ /PMS systems, respectively. Hg 0 removal processes in four systems belong to fast reaction and were controlled by mass transfer under optimized experimental conditions.

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Section: Introductionmentioning

confidence: 99%

Gaseous Elemental Mercury Removal Using Combined Metal Ions and Heat Activated Peroxymonosulfate/H₂O₂ Solutions

Liu

Wang

2018

AIChE Journal

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“…1 Anthropogenic sources of mercury include industrial combustion such as coal combustion, nonferrous metal smelting, waste incinerators, and cement production. 2,3 Mercury and its compounds produced by anthropogenic and natural sources can circulate in the atmosphere for up to 1 year, so they can be widely distributed and transmitted thousands of kilometers away, and then transferred to surface waters and land through meteorological activities. 4 Mercury is mainly present in the atmosphere in the form of elemental form (Hg 0 ) that can be directly inhaled.…”

Section: Introductionmentioning

confidence: 99%

Gas-phase elemental mercury removal by nano-ceramic material

Zhu

Jing

Xing

et al. 2020

Nanomaterials and Nanotechnology

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The nano-ceramic which is mesoporous silica material was applied to test the removal efficiency of gas-phase Hg0 using a fixed-bed reactor. The physical and chemical properties of nano-ceramic were investigated by various techniques such as BET surface area (BET), X-ray diffraction, fourier transform infrared spectrometer (FTIR), and scanning electron microscope (SEM); then, the sample was tested for mercury adsorption under different conditions. The mercury adsorption tests shown that different Hg0 concentration, adsorption temperature, gas flow rate, and different gas components have significant effects on the mercury removal performance of nano-ceramic, and the adsorption removal rate of nano-ceramic can be 75.58% under the optimal experimental conditions. After fitting the experimental data to the adsorption model, it was found that the theoretical maximum mercury adsorption amount q max of nano-ceramic is 1.61 mg g−1 and there were physical and chemical adsorption at the same time. The adsorption kinetics fitting results shown that the adsorption process of nano-ceramic exhibits multi-segment characteristics of “transmembrane–diffusion–adsorption.”

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“…It has been found that the anthropogenic emission is responsible for most of the mercury pollution, which is mainly from coalfired power plants and heavy metal smelters (Carpi 1997;Feng et al 2006). In recent years, with increasing awareness of environmental protection, many efforts have been made to reduce mercury emission by investigating the fate of mercury in the flue gas after leaving the coal-fired boiler (Dranga et al 2012;Shen et al 2015;Liu et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Effect of additives on stabilization and inhibition of mercury re-emission in simulated desulphurization slurry

Hao

Sun²,

Zhou

et al. 2019

Int. J. Environ. Sci. Technol.

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The introduction of additives into desulfurization slurry may inhibit the mercury re-emission from slurry and improve the stabilization of mercury in slurry. In this paper, the effect of common additives, such as sodium sulfide (Na 2 S), 2,4,6-trimercaptotriazine trisodium (TMT-18), sodium dithiocarbamate (DTCR-2) and Fenton reagent, on mercury distribution in gas-liquid-solid phase was investigated under typical operating conditions. Meanwhile, the effect of different additive dosages on the inhibition performance of mercury re-emission was studied. Furthermore, the inhibition mechanisms of different additives were also discussed. The experimental results showed that Na 2 S, TMT-18, DTCR-2 and Fenton reagent could inhibit the mercury re-emission from desulfurization slurry and some mercury that might reemit into the gas phase before would be restrained in the solid phase. For additives such as Na 2 S, TMT-18 and DTCR-2, with the increase in additive dosages, the inhibition performances of mercury re-emission were improved, but the enhancing effects tended to level off. More mercury could be restrained in the solid phase by forming HgS, Hg-TMT and Hg-DTCR. However, for additives such as Fenton reagent, the inhibition performance of mercury re-emission was first increased and then decreased with the proportion of Fe 2+ and H 2 O 2 in Fenton reagent increasing. There existed an optimal proportion. The oxygenated free radical generated by Fenton reagent with Fe 2+ as catalysis was the main reason for the inhibition of mercury re-emission, and more mercury would be oxidized and then restrained in solid phase due to the formation of HgSO 4 and Fe(OH) 3 .

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A study on removal of elemental mercury in flue gas using fenton solution

Cited by 76 publications

References 28 publications

Gaseous Elemental Mercury Removal Using Combined Metal Ions and Heat Activated Peroxymonosulfate/H₂O₂ Solutions

Gaseous Elemental Mercury Removal Using Combined Metal Ions and Heat Activated Peroxymonosulfate/H₂O₂ Solutions

Gas-phase elemental mercury removal by nano-ceramic material

Effect of additives on stabilization and inhibition of mercury re-emission in simulated desulphurization slurry

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A study on removal of elemental mercury in flue gas using fenton solution

Cited by 76 publications

References 28 publications

Gaseous Elemental Mercury Removal Using Combined Metal Ions and Heat Activated Peroxymonosulfate/H2O2 Solutions

Gaseous Elemental Mercury Removal Using Combined Metal Ions and Heat Activated Peroxymonosulfate/H2O2 Solutions

Gas-phase elemental mercury removal by nano-ceramic material

Effect of additives on stabilization and inhibition of mercury re-emission in simulated desulphurization slurry

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Product

Resources

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Gaseous Elemental Mercury Removal Using Combined Metal Ions and Heat Activated Peroxymonosulfate/H₂O₂ Solutions

Gaseous Elemental Mercury Removal Using Combined Metal Ions and Heat Activated Peroxymonosulfate/H₂O₂ Solutions