Emissions of polycyclic aromatic hydrocarbons from coking industries in China

Mu, Ling; Lin, Peng; Cao, Junji; He, Qiusheng; Li, Fan; Zhang, Jianqiang; Liu, Xiaofeng; Bai, Huiling

doi:10.1016/j.partic.2012.04.006

Cited by 86 publications

(30 citation statements)

References 42 publications

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“…The raw materials, operating technologies, and fuel types are important factors that may influence unintentional POP emissions during industrial thermal processes [29][30][31][32][33][34][35]. The possible influence of raw materials, fuel types, and plant scales on PCN concentrations in stack gas and fly ash samples were preliminarily investigated in this study.…”

Section: Pcn Emissions In Major Dischargesmentioning

confidence: 99%

“…These results show that the emission levels of PCNs in discharges may be related to the fuel type. Studies have shown that incomplete combustion of fossil fuel causes polycyclic aromatic hydrocarbon pollution during multiple industrial processes [30,31]. Light oil (naphtha) is a fossil fuel composed mainly of alkanes, cycloalkanes, alkenes, and aromatic hydrocarbons with carbon numbers of 3-12.…”

Section: Pcn Emissions In Major Dischargesmentioning

confidence: 99%

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Case study of polychlorinated naphthalene emissions and factors influencing emission variations in secondary aluminum production

Jiang

Liu

Wang

et al. 2015

Journal of Hazardous Materials

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h i g h l i g h t s• Variations in PCN emissions from different smelting stages were observed.• Factors influencing PCN emission levels and profiles were identified.• Addition of chloride additives possibly promote PCN formations.• Emission factors for gaseous and various solid discharges were derived.• This study is helpful for developing better control strategies for PCN reduction. Keywords: Secondary aluminum production Smelting stages Polychlorinated naphthalene Solid residues Chloride additives a b s t r a c t Secondary aluminum production has been recognized as an important source of polychlorinated naphthalenes (PCNs). Large variations in PCN emissions as the smelting process proceeds have not been determined. In this study, solid and gaseous discharges, including fly ash, slag, and stack gas samples collected from four secondary smelting plants during different smelting stages were analyzed for PCNs. The average emission factor of 1−8 PCNs to air was calculated to be 17.4 mg t −1 , with a range of 4.3-29.5 mg t −1 . The average emission factors of 1-8 PCNs from fly ash and slag were 55.5 ng t −1 and 0.13 ng t −1 , respectively. The derived emission factors may enable a more accurate estimation of annual emissions and a more comprehensive knowledge of the distribution of PCNs emitted from secondary aluminum production. The emission levels and characteristics of PCNs during different smelting stages were compared. Possible factors, including the organic impurities from aluminum scrap, fuel, and chloride additives, which could contribute to variations in PCN emissions and characteristics were discussed. These results may provide useful information for developing better control strategies for reducing PCN emissions in secondary aluminum production.

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Section: Pcn Emissions In Major Dischargesmentioning

confidence: 99%

Section: Pcn Emissions In Major Dischargesmentioning

confidence: 99%

Case study of polychlorinated naphthalene emissions and factors influencing emission variations in secondary aluminum production

Jiang

Liu

Wang

et al. 2015

Journal of Hazardous Materials

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“…The OC/EC ratio at site D was 2.35, indicating that secondary pollution exists at site D. Bieniek and Lusiak (2012) reported that coking emits large amounts of SOC precursors such as toluene, m-xylene, and p-xylene. Moreover, coking emits a large amount of semi-VOCs such as PAHs, and gas-to-particle conversion of these compounds influence OC concentrations in the coking plant air (Shi et al, 2011;Mu et al, 2013;Mu et al, 2014). Therefore, the OC distribution in the coking plant air was due to the cumulative effect of coking emissions, atmospheric dispersion and dilution, SOC formation from VOCs, and gas-to-particle conversion of semi-VOCs.…”

Section: Characteristics Of Oc and Ecmentioning

confidence: 99%

“…Coking is a dry distillation process in oxygen-free conditions at high temperatures (Mastral and Callén, 2000). The contaminants emitted during coking include inorganic compounds, heavy metals, OC, and EC (Tsai et al, 2007;Mu et al, 2012;Liu et al, 2013;Mu et al, 2013;Liu et al, 2014). Coke-plant workers are exposed to organic pollutants, leading to high lung cancer mortality (Redmond, 1983;Bertrand et al, 1987).…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Organic Carbon and Elemental Carbon in the Ambient Air of Coking Plant

Liu

Lin

Bai

et al. 2015

Aerosol Air Qual. Res.

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To investigate the characteristics of organic carbon (OC) and elemental carbon (EC) in the ambient air of coking plant, particulate matter samples were collected and analyzed. The OC and EC mass concentrations were in the range of 104.2-223.2 µg/m 3 and 93.7-237.8 µg/m 3 , respectively, which were much higher than those in the ambient air of industry, highway, and urban roadway tunnel. The OC concentrations did not significantly differ at the coke side and the machine side, whereas the EC concentration was significantly higher at the coke side. The OC/EC ratios ranged from 0.74 to 2.35, and coking was the primary source of OC and EC. Carbonaceous aerosol was a large component in the ambient air, and the total carbonaceous aerosol (TCA) accounted for 39.1%-73.0% of the total suspended particulates (TSP). TCA contributions to TSP were consistent at the coke side and the machine side, and both contributions were lower than those at other sampling sites. OC and EC emission control must be strengthened for improving coking plant air quality and reducing health hazards to coke-plant workers. OC-EC correlation was evident, with a correlation coefficient of 0.976 (p < 0.05) at the coke-oven top, coke side, and machine side, whereas no significant correlations were observed at sites downwind of the coke oven (p > 0.05).

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“…Most PAHs in the environment arrive from pyrogenic sources. So far, pyrogenic anthropogenic sources of PAHs (automobile exhaust, various industrial and power plant emissions) are well studied (Khan et al, 2008;Mastral and Callen, 2000;Wilcke, 2000Wilcke, , 2007Agarwal, 2009;Kwon, 2014;Mu et al, 2013) and, nowadays, in developed countries, there is a trend of reducing environmental contamination with PAHs because of improvement in technologies (Guo et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Polycyclic aromatic hydrocarbons in post-fire soils of drained peatlands in western Meshchera (Moscow region, Russia)

et al. 2014

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Abstract. Polycyclic aromatic hydrocarbons (PAHs) are priority pollutants that arrive in the environment from numerous anthropogenic and natural sources, but the data on their natural sources including wildfires remain insufficient. The level of contamination and the composition of PAHs in soils of the areas affected by wildfires were studied in this work. The study was conducted in the Moscow region (Russia) in areas occupied by drained peatland and strongly damaged by fires in 2002, 2010 and 2012. The features of PAH accumulation and the profile distributions in histosols and histic podzols after the fires of different times were analyzed. It was shown that new soil horizons formed after the fires -Cpir, Hpir and incipient O horizons -and that these horizons differ in PAH accumulation rate. Maximal total concentrations of 14 PAHs were detected in charred peat horizons Hpir (up to 330 ng g −1 ) and in postfire incipient O horizons (up to 180 ng g −1 ), but the highmolecular-weight PAHs (benz(ghi)perylene, benz(a)pyrene, benz(k)fluoranthene) were revealed only in charry peat horizons. The trends of higher PAH concentrations were found in cases when smoldering combustion resulted in rather thick residual peat horizons. In cases of almost complete pyrogenic destruction of He horizons, total PAH concentrations were no more than 50 ng g −1 . Also, PAH accumulation in upper horizons of soils near the sites of the latest fires was observed.

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Emissions of polycyclic aromatic hydrocarbons from coking industries in China

Cited by 86 publications

References 42 publications

Case study of polychlorinated naphthalene emissions and factors influencing emission variations in secondary aluminum production

Case study of polychlorinated naphthalene emissions and factors influencing emission variations in secondary aluminum production

Characteristics of Organic Carbon and Elemental Carbon in the Ambient Air of Coking Plant

Polycyclic aromatic hydrocarbons in post-fire soils of drained peatlands in western Meshchera (Moscow region, Russia)

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