Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/137814
Title: Monochlorinated to octachlorinated polychlorinated dibenzo-p-dioxin and dibenzofuran emissions in sintering fly ash from multiple-field electrostatic precipitators
Authors: Wang, Mengjing
Li, Qianqian
Liu, Wenbin
Fang, Mingliang
Han, Ying
Keywords: Engineering::Civil engineering
Issue Date: 2018
Source: Wang, M., Li, Q., Liu, W., Fang, M., & Han, Y. (2018). Monochlorinated to octachlorinated polychlorinated dibenzo-p-dioxin and dibenzofuran emissions in sintering fly ash from multiple-field electrostatic precipitators. Environmental Science and Technology, 52(4), 1871-1879. doi:10.1021/acs.est.7b04848
Journal: Environmental Science and Technology
Abstract: Polychlorinated dibenzo-p-dioxin and dibenzofuran (PCDD/F) emissions in fly ash from multiple-field electrostatic precipitators in different sized sintering plants were studied. The monochlorinated-trichlorinated and tetrachlorinated-octachlorinated PCDD/F concentrations were higher for small plants (90 m2) than for medium (91-180 m2) and large (>180 m2) plants. The PCDD/F concentrations and less-chlorinated PCDD/F contributions to the total PCDD/F concentrations increased as the fly ash particle size decreased moving through the precipitator stages; the abundance of monochlorinated-trichlorinated PCDD/F congeners and homologues also increased. The ash particle size and surface area can be directly used to indicate monochlorinated-trichlorinated PCDD/Fs and toxic equivalents (TEQs). Previously ignored PCDD/F emissions in discarded fly ash were identified. Estimated total monochlorinated-trichlorinated PCDD/F and TEQ emissions in discarded fly ash were 155 and 1.979 kg TEQ, respectively, in 2003-2014, and the ratio between annual PCDD/F emissions in discarded fly ash and flue gases has gradually increased. Reductions in monochlorinated-trichlorinated PCDD/F emitted in flue gas and fly ash in 2003-2014 were 28 and 40 kg, respectively, because of the phasing out of small-scale plants. Reductions in TEQs emitted in flue gas and fly ash in 2003-2014 were 7476 and 180 g TEQ, respectively.
URI: https://hdl.handle.net/10356/137814
ISSN: 0013-936X
DOI: 10.1021/acs.est.7b04848
Rights: © 2018 American Chemical Society. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:CEE Journal Articles

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