Distribution of polycyclic aromatic hydrocarbons and polychlorinated dibenzo-p-dioxins/dibenzofurans in ash from different units in a municipal solid waste incinerator

Abstract

Polycyclic aromatic hydrocarbons (PAHs), polychlorinated-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) are some of the major organic contaminants emitted in municipal solid waste incinerators (MSWIs). The distribution of PAHs and PCDD/Fs in different MSWI unit ashes, including bottom residue (BR), fly ash pit (FAP), fabric filter (FF), semi-dryer absorber (SDA), economizer (EC) and super heater (SH), has seldom been discussed. Average PAHs content in ash samples from BR, FAP, FF, SDA, EC and SH were found to be 0.020, 0.237, 0.234, 0.125, 0.037 and 0.034 µg TEQ g^—1, respectively. In addition, the range of total emission factor from different unit ashes varied between 0.30—13.85 mg TEQ tonne^—1 of waste, low molecular weight compounds (2~3-ring) being the dominant species. Furthermore, PAHs in ashes were mainly found in BR (41%) and FAP (31%). The FAP ash included 18% of PAHs coming from FF ash. On the other hand, PCDD/Fs content in BR, FAP, FF, SDA, EC and SH was found to be 0.0329, 1.1589, 1.2807, 0.1476, 0.6868 and 0.0921 ng I-TEQ g^—1, respectively. PCDD/ Fs emission factors in this study ranged between 1.029—67.740 µg I-TEQ tonne^—1 of waste, most PCDD/Fs being present in FAP (55%). The FAP ash included 33% of PCDD/Fs coming from FF ash. Therefore, PCDD/Fs content in FAP and FF exceeded the legal limit of 1 ng I-TEQ g^—1; therefore, a solidification process is necessary before landfilling in Taiwan.

Keywords

MSWI ash PAHs PCDD/Fs distribution profiles

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References

Abad E. , Adrados, M.A. , Caixach, J. , Fabrellas B. & Rivera J. ( 2000) Dioxin mass balance in a municipal waste incinerator . Chemosphere, 40, 1143-1147.

Chou, J.D. , Wey, M.Y. & Chang, S.H. ( 2008) Emission of Pb and PAHs from thermally co-treated MSWI fly ash and bottom ash process. Journal of Hazardous Materials , 150, 27-36.

Davies, I.W. , Harrison, R.M. , Perry, R. , Ratnayaka, D. & Wellings, R.A. ( 1976) Municipal incinerator as a source of polynuclear aromatic hydrocarbons in environment. Environmental Science Technology , 10, 451-453.

diPalo, C. , deStefanis, P. , Massa, M. & Montani, R. ( 1996) Emission of polycyclic aromatic hydrocarbons (PAH) from solid waste incinerator equipped with an after-combustion chamber. Polycyclic Aromatic Compounds, 9, 45-51.

Everaert, K. & Baeyens, J. ( 2002) The formation and emissions of dioxins in large scale thermal process. Chemosphere, 46, 439-448.

Fangmark, I. , van Bavel, B. , Marklund, S. , Stromberg, B. , Berge, N. & Rappe, C. ( 1993) Influence of combustion parameters on the formation of polychlorinated dibenzo-p-dioxins, dibenzofurans, benzenes, and biphenyls and polyaromatic hydrocarbons in a pilot incinerator. Environmental Science & Technology, 27, 1602-1610.

Ibáñez, R. , Andrés, A. , Viguri, J.R. , Ortiz, I. & Irabien J.A. ( 2000) Characterisation and management of incinerator wastes . Journal of Hazardous Materials, A79, 215-227.

Johansson, I. & van Bavel, B. ( 2003) Polycyclic aromatic hydrocarbons in weathered bottom ash from incineration of municipal solid waste Chemosphere, 53, 123-128.

Mininni, G. , Sbrilli, A. , Braguglia, C.M. , Guerriero, E. , Marani, D. & Rotatori, M. ( 2007) Dioxins, furans and polycyclic aromatic hydrocarbons emissions from a hospital and cemetery waste incinerator. Atmospheric Environment, 41, 8527-8536.

10.

Lin, W.Y. , Wang, L.C. , Wang, Y.F. , Li, H.W. & Chang-Chien, G.P. ( 2008) Removal characteristics of PCDD/Fs by the dual bag filter system of a fly ash treatment plant. Journal of Hazardous Materials, 153, 1015-1022.

11.

Morselli, L. & Zappoli, S. ( 1988) PAH determination in samples of environmental interest . The Science of Total Environment, 73, 257-266.

12.

Nisbet, I.C. & LaGoy, P.K. ( 1992) Toxic equivalency factors (TEFs) for polycyclic aromatic hydrocarbons (PAHs). Regulatory Toxicology and Pharmacology , 16, 290-300.

13.

Shin K.J. & Chang Y.S. ( 1999) Characterization of polychlorinated dibenzo-p-dioxins, dibenzofurans, biphenyls, and heavy metals in fly ash produced from Korean municipal solid waste incinerators. Chemosphere, 38, 2655-2666.

14.

Stegemann, J.A. , Schneider, J. , Baetz, B.W. & Murphy, K.L. ( 1995) Lysimeter washing of MSW incinerator bottom ash . Waste Management Research, 13, 149-165.

15.

Suzuki K. , Kasai E. , Aono T. , Yamazaki H. & Kawamoto K. ( 2004) De novo formation characteristics of dioxins in the dry zone of an iron ore sintering bed. Chemosphere, 54, 97-104.

16.

Taiwan EPA. ( 2004) NIEA 119.02B, Waste and incinerator ash sampling method .

17.

Tuppurainen, K. , Halonen, I. , Ruokojärvi, P. , Tarhanen, J. & Ruuskanen, J. ( 1998) Formation of PCDDs and PCDFs in municipal waste incineration and its inhibition mechanisms: a review, Chemosphere , 36, 1493-1511.

18.

Usepa. (1998) Method 8290A, polychlorinated-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) by high-resolution gas chromatography/high-resolution mass spectrometry (HRGC/HRMS).

19.

Usepa. (1999) Method 1613A, tetra- through octa-chlorinated dioxins and furans by isotope dilution HRGC/HRMS .

20.

US Minnesota Rules 7035.2910. (2001) Municipal Waste Combustor Ash Testing Requirements.

21.

Wang, L.C. , Lee, W.J. , Chang-Chien, G.P. & Tsai, P.J. ( 2003) Characterizing the emission of polychlorinated dibenzo-p-dioxins and dibenzofurans from crematories and their impacts to the surrounding environment . Environmental Science and Technology , 37, 62-67.

22.

Wang, L.C. , Lee, W.J. , Lee, W.S. , Chang-Chien, G.P. & Tsai, P.J. ( 2003) Characterizing the emission of polychlorinated dibenzo-p-dioxins and dibenzofurans from crematories and their impacts to the surrounding environment . Environmental Science and Technology , 37, 62-67.

23.

Wild, S.R. , Mitchell, D.J. , Yelland, C.M. & Jones, K.C. ( 1992) Arrested municipal solid-waste incinerator fly-ash as a source of polynuclear aromatic hydrocarbons (PAHs) to the environment . Waste Management Research, 10, 99-111.

24.

Yasuda, K. , Kaneko, M. , Sugiyma, K. , Yashino, H. & Otsuka, Y. ( 1989) Basic research on the emission of polycyclic aromatic hydrocarbon caused by waste incineration. Journal of Air Pollution Control Association, 39, 1557-1561.