[PCDD/Fs distribution in MSWI fly ash and identification of the indicated isomer].
Four municipal solid waste incinerator (MSWI) fly ash samples were analyzed for PCDD/Fs. The toxicity equivalent quotient (TEQ) was 0.34 - 3.80 ng/g. The congeners distribution presented great comparability to each other as 1,2,3,7,8-PeCDD and 2,3,4,7,8-PeCDF contributed about 33.6% - 40.5% of total TEQ. Combination with the published PCDD/Fs results of the long-term monitoring in MSWI fly ash in Shanghai, it was found that total TEQ had good correlation with 1,2,3,7,8-PeCDD and 2,3,4,7,8-PeCDF contribution (r = 0.996 3 and 0.997 4 respectively), so they could be considered as indicator isomers for the rapid determination of TEQ evaluation, especially in long-term monitoring of one incinerator. The indicator factors were 4.466 4 and 3.164 6 respectively. The analysis of the PCDD/Fs results from different incinerators also showed good correlation with 2,3,4,7,8-PeCDF contribution (r = 0.984 9) and it could be considered as indicator isomer for TEQ evaluation of MSWI fly ash samples. The indicator factor was 3.4194.
Wang
Wei
W
Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China. solid@tsinghua.edu.cn
Gao
Xing-Bao
XB
D000393:Air Pollutants / Q000032:analysis* / Q000737:chemistry; D001572:Benzofurans / Q000032:analysis* / Q000737:chemistry; D002244:Carbon; D060729:Coal Ash; D000072338:Dibenzofurans, Polychlorinated; D017745:Incineration; D007536:Isomerism; D052638:Particulate Matter; D000072317:Polychlorinated Dibenzodioxins / Q000031:analogs & derivatives* / Q000032:analysis / Q000737:chemistry; D012037:Refuse Disposal / Q000379:methods*; D018505:Waste Management / Q000379:methods / Q000706:statistics & numerical data
D000393:Air Pollutants; D001572:Benzofurans; D060729:Coal Ash; D000072338:Dibenzofurans, Polychlorinated; D052638:Particulate Matter; D000072317:Polychlorinated Dibenzodioxins; D002244:Carbon