TY - JOUR
T1 - Concentrations, profiles, and emission factors of unintentionally produced persistent organic pollutants in fly ash from coking processes
AU - Liu, Guorui
AU - Liu, Wenbin
AU - CAI, Zongwei
AU - Zheng, Minghui
N1 - Funding Information:
We gratefully acknowledge the support from the National 973 Program (No. 2009CB421606 ), the Hong Kong Scholars Program ( XJ2012055 ), and the National Natural Science Foundation of China (Nos. 21107123 and 21037003 ).
PY - 2013/10/5
Y1 - 2013/10/5
N2 - The coking process has been found to be an important source of unintentionally produced persistent organic pollutants (UP-POPs). However, the concentrations, profiles, and emission factors of UP-POPs in fly ash from coke plants have not been studied. In this study, six UP-POPs (polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs), polychlorinated biphenyls (PCBs), polychlorinated naphthalenes (PCNs), hexachlorobenzene (HxCBz), and pentachlorobenzene (PeCBz)) were identified and quantified in fly ash from eight coke plants. The average concentrations of the PCDDs, PCDFs, and "dioxin-like" PCBs were 1.5, 2.26, and 0.26pgTEQg-1, respectively, and the average concentrations of the PCNs, HxCBz, and PeCBz were 256, 290, and 146pgg-1, respectively. The proportion each homolog contributed to the total concentration of the PCDFs, PCBs, and PCNs decreased with increasing chlorination level. The PCDFs contributed the biggest proportion of the total UP-POPs toxic equivalents (TEQs), and the average emission factors in fly ash were 10.5, 17.3, and 1.82ngTEQt-1 for the PCDDs, PCDFs, and "dioxin-like" PCBs, respectively, and 1792, 2028, and 1025ngt-1 for the PCNs, HxCBz, and PeCBz, respectively. These data are essential for establishing an integrated UP-POP release inventory.
AB - The coking process has been found to be an important source of unintentionally produced persistent organic pollutants (UP-POPs). However, the concentrations, profiles, and emission factors of UP-POPs in fly ash from coke plants have not been studied. In this study, six UP-POPs (polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs), polychlorinated biphenyls (PCBs), polychlorinated naphthalenes (PCNs), hexachlorobenzene (HxCBz), and pentachlorobenzene (PeCBz)) were identified and quantified in fly ash from eight coke plants. The average concentrations of the PCDDs, PCDFs, and "dioxin-like" PCBs were 1.5, 2.26, and 0.26pgTEQg-1, respectively, and the average concentrations of the PCNs, HxCBz, and PeCBz were 256, 290, and 146pgg-1, respectively. The proportion each homolog contributed to the total concentration of the PCDFs, PCBs, and PCNs decreased with increasing chlorination level. The PCDFs contributed the biggest proportion of the total UP-POPs toxic equivalents (TEQs), and the average emission factors in fly ash were 10.5, 17.3, and 1.82ngTEQt-1 for the PCDDs, PCDFs, and "dioxin-like" PCBs, respectively, and 1792, 2028, and 1025ngt-1 for the PCNs, HxCBz, and PeCBz, respectively. These data are essential for establishing an integrated UP-POP release inventory.
KW - Coking process
KW - Dioxins
KW - Fly ash
KW - Polychlorinated biphenyls
KW - Polychlorinated naphthalenes
UR - http://www.scopus.com/inward/record.url?scp=84882965408&partnerID=8YFLogxK
U2 - 10.1016/j.jhazmat.2013.07.063
DO - 10.1016/j.jhazmat.2013.07.063
M3 - Journal article
C2 - 23973475
AN - SCOPUS:84882965408
SN - 0304-3894
VL - 261
SP - 421
EP - 426
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
ER -