PAH emissions from coal combustion and waste incineration

Hsu, Wen Hu; Liu, Mei Chen; Hung, Pao Chen; Chang, S. L.; Chang, Moo Been

doi:10.1016/j.jhazmat.2016.06.038

Cited by 98 publications

(29 citation statements)

References 35 publications

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“…The PAH emissions profile was dominated by Nap and Phe, accounting for 53 % and 27 % of ∑16 PAHs, followed by Flu, Flt and Pyr. Nap and Phe are 185 often reported as major emitted compounds from power plants equipped with analogous exhaust cleaning systems and/or burning the same type of coal (Hsu et al, 2016;Li et al, 2016;Wang et al, 2015). A similar PAH emissions profile was reported by Hsu et al (2016) for the power plant in central Taiwan (Table S12).…”

Section: Longyearbyen Power Plant Pah Emission Profilesupporting

confidence: 56%

“…Nap and Phe are 185 often reported as major emitted compounds from power plants equipped with analogous exhaust cleaning systems and/or burning the same type of coal (Hsu et al, 2016;Li et al, 2016;Wang et al, 2015). A similar PAH emissions profile was reported by Hsu et al (2016) for the power plant in central Taiwan (Table S12). A higher flue gas dust concentration and different coal sources resulted in 40% emissions of four ringed PAHs compared to 11% for Longyearbyen PP.…”

Section: Longyearbyen Power Plant Pah Emission Profilesupporting

confidence: 56%

See 1 more Smart Citation

Polycyclic aromatic hydrocarbons (PAHs), oxy- and nitro-PAHs in ambient air of Arctic town Longyearbyen, Svalbard

Drotikova¹,

Ali²,

Halse³

et al. 2020

Preprint

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Abstract. Polycyclic aromatic hydrocarbons (PAHs) are not declining in Arctic air despite reductions in their global emissions. In Svalbard, the Longyearbyen coal-fired power plant is considered to be one of the major local source of PAHs. Power plant stack emissions and ambient air samples, collected simultaneously 1 km (UNIS) and 6 km (Adventdalen) transect distance, were analyzed (gaseous and particulate phases separately) for 22 nitro-PAHs, 9 oxy-PAHs and 16 parent PAHs by GC/ECNI/MS and GC-MS/MS. Results confirm low level of PAH emissions (∑16 PAHs = 1.5 µg kg−1 coal) from the power plant. Phenathrene, 9,10-anthraquinone, 9-fluorenone, fluorene, fluoranthene, and pyrene accounted for 85 % of the plant emission (not including naphthalene). A dilution effect was observed for the transect ambient air samples, 1.26 ± 0.16 and 0.63 ± 0.14 ng m−3 sum all 47 PAH derivatives for UNIS and Adventdalen, respectively. The PAH profile was homogeneous for these recipient stations with phenathrene and 9-fluorenone being most abundant. Principal component analysis, in combination with PAH diagnostic ratios and literature data on different source-specific markers, confirmed coal combustion, gasoline, and diesel traffic as the predominant sources of PAHs. Secondary atmospheric formation of 9-nitroanthracene and 2+3-nitrofluoranthene was evaluated and concluded. Results also indicate that ambient PAH concentrations were affected by precipitation events, and specific humidity is an essential parameter influencing PAH scavenging from the air. The present study contributes important data which can be utilized to eliminate uncertainties in model predictions that aim to assess the extent and impacts of Arctic atmospheric contaminants.

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Section: Longyearbyen Power Plant Pah Emission Profilesupporting

confidence: 56%

Section: Longyearbyen Power Plant Pah Emission Profilesupporting

confidence: 56%

Polycyclic aromatic hydrocarbons (PAHs), oxy- and nitro-PAHs in ambient air of Arctic town Longyearbyen, Svalbard

Drotikova¹,

Ali²,

Halse³

et al. 2020

Preprint

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“…Chemical mechanisms of soot formation using aromatic hydrocarbons containing fuels, the synthesis of benzo(a)pyrene comes in two ways: by condensation of benzene rings, and by polymerizing the pyrolysis products. In the second case, an important role is played by acetylene (mol/kg) as one of the main elements included in the kinetic scheme of synthesis of aromatic hydrocarbons [1,6,[34][35][36] Research on the mechanism of formation of benzo(a) pyrene during burning previously prepared water fuel emulsions showed that the level of concentration of the substance depends on the type of fuel mixture composition and the intensity of diffusion processes in the combustion zone [6,8,21,37,38]. For a given type of fuel, the main determining parameter was the mixture composition, which was characterized by excess air coefficient and the amount of water in the fuel [39][40][41][42][43][44][45].…”

Section: Resultsmentioning

confidence: 99%

“…Consequently, safety problems related to benzo(a) pyrene continue to remain actual and the development of effective ways to minimize benzo(a)pyrene in a technogenic environment is still unresolved [18][19][20][21][22][23][24][25][26][27]. Therefore, in this study the formation and degradation of benzo(a)pyrene in model conditions was calculated according to thermodynamic conditions.…”

Section: Introductionmentioning

confidence: 99%

Reducing Concentrations of Benzo(a)pyrene in Gas Phase Soot Particles by Using and Burning Water Fuel Emulsions

Kemelov¹,

Maymekov²,

Sambaeva³

et al. 2020

Pol. J. Environ. Stud.

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In this study, benzo(a)pyrene-water-oxygen systems were investigated in wide ranges of change of temperature value and initial components to predict in which conditions benzo(a)pyrene degraded into more harmful substances. Consequently, the thermodynamic parameters of the benzo(a) pyrene-water-oxygen system were calculated and the concentration distribution of carbon, hydrogen and oxygen-containing particles in the gas phase were established. Adding water into the system allowed decreasing of carbon and acetylene. These elements are the key elements of benzo(a)pyrene formation. According to this, the main parameter for reducing the concentration of benzo(a)pyrene in the gas phase was the water content in fuel oil within 10-15%. Determination of the concentration of benzo(a)pyrene in samples of flue gases of DKVR-4/13 and PTVM-30M boiler units of the Teplokommunoenergo heating organization of Bishkek city was carried out by chromatographic method. Concentrations of benzo(a)pyrene were found to compare the product of burning ordinary fuel oil and water fuel emulsion. Homogenization of the fuel-air mixture by adding water to the fuel oil allowed us to obtain an inverse emulsion and reduce the concentration of benzo(a)pyrene in flue gases up to 62%. According to this, a new process flowsheet of water fuel emulsions production was proposed for the heating organization.

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“…Under a temperature range of 180-600 • C, heavy metals in the incinerator are vaporized and react with chlorines to form heavy metal chlorides in the flue (Formula (1)). These heavy metal chlorides are effective catalysts in the formation of dioxins [25,26]. With the help of formed catalysts, HCl can react with O 2 or oxidizing radicals to form chlorine radicals, indirectly promoting dioxin formation [27] (Formula (2)).…”

Section: High Content Of Dioxinsmentioning

confidence: 99%

Characteristics and Treatment Methods of Medical Waste Incinerator Fly Ash: A Review

et al. 2018

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Medical waste incinerator fly ash (MWIFA) is quite different from municipal solid waste incinerator fly ash (MSWIFA) due to its special characteristics of high levels of chlorines, dioxins, carbon constituents, and heavy metals, which may cause irreversible harm to environment and human beings if managed improperly. However, treatment of MWIFA has rarely been specifically mentioned. In this review, various treatment techniques for MSWIFA, and their merits, demerits, applicability, and limitations for MWIFA are reviewed. Natural properties of MWIFA including the high contents of chlorine and carbonaceous matter that might affect the treatment effects of MWIFA are also depicted. Finally, several commendatory and feasible technologies such as roasting, residual carbon melting, the mechanochemical technique, flotation, and microwave treatment are recommended after an overall consideration of the special characteristics of MWIFA, balancing environmental, technological, economical information.

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PAH emissions from coal combustion and waste incineration

Cited by 98 publications

References 35 publications

Polycyclic aromatic hydrocarbons (PAHs), oxy- and nitro-PAHs in ambient air of Arctic town Longyearbyen, Svalbard

Polycyclic aromatic hydrocarbons (PAHs), oxy- and nitro-PAHs in ambient air of Arctic town Longyearbyen, Svalbard

Reducing Concentrations of Benzo(a)pyrene in Gas Phase Soot Particles by Using and Burning Water Fuel Emulsions

Characteristics and Treatment Methods of Medical Waste Incinerator Fly Ash: A Review

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