Characteristics of PCDD/Fs in PM2.5 from emission stacks and the nearby ambient air in Taiwan

Abstract This study aimed to find the characteristics of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) in fine particulate matter from different stationary emission sources (coal-fired boiler, CFB; municipal waste incinerator, MWI; electric arc furnace, EAF) Taiwan relationship between PM 2.5 -bound PCDD/Fs with Taiwanese mortality risk. was quantified using gravimetry corresponding chemical analyses were done for chemicals. Mortality risks exposure calculated Poisson regression. The highest concentration (0.53 ± 0.39 mg/Nm 3 ) (0.206 0.107 ng I-TEQ/Nm found CFB EAF, respectively. Higher proportions PCDDs over PCDFs observed flue gases MWI whereas it reversed EAF. For ambient air, PCDD/F congeners around dominated by vapor phase. Positive matrix factorization (PMF) analysis that atmosphere 14.6% EAF (r = 0.81), 52.6% 0.74), 18.0% traffic 0.85) 14.8% 0.76). dioxin congener distribution, dominant MWI, It may be attributed formation mechanisms among wastes incineration, steel-making, coal-burning processes.