Abstract
During 2015–2017, the atmospheric PM2.5, PM2.5/PM10, PCDD/Fs, PCDD/F phase distribution and PM2.5-bound total PCDD/Fs-WHO2005-TEQ content in Wuhu and Bengbu were investigated in this study. In addition, the sensitivity analysis for PM2.5-bound total PCDD/Fs-WHO2005-TEQ of Wuhu was also studied. During 2015–2017, the three-year average PM2.5 concentration in Wuhu was 53.0 µg m–3, and in Bengbu was 61.4 µg m–3; the results also showed the annual average PM2.5 concentrations of these two cities had declined, but the levels were still far above the WHO annual PM2.5 standard (10 µg m–3). In addition, in Wuhu, the PM2.5-bound total PCDD/Fs-WHO2005-TEQ contents in summer (0.166 ng-WHO2005-TEQ g–1) were approximately only 68.8% in magnitude lower than the average value of other three seasons (0.532 ng-WHO2005-TEQ g–1), and that of Bengbu in summer (0.187 ng-WHO2005-TEQ g–1) was approximately 66.7% in magnitude lower than the average value of other three seasons (0.561 ng-WHO2005-TEQ g–1). Sensitivity analysis showed that the PCDD/F concentration was the most positively correlated sensitive factor for PM2.5-bound total PCDD/Fs-WHO2005-TEQ, and when ΔP/P was changed from 0% to +50%, ΔS/S responded from 0% to +106%. The second positively correlated sensitive factor was PM10 concentration, and when ΔP/P was changed from 0% to +50%, ΔS/S responded from 0% to +72%. This was followed by atmospheric temperature, and its effect was negatively correlated, when ΔP/P was changed from –50% to +50%, ΔS/S responded from +73% to –112%. The last sensitive parameter was PM2.5 concentration, with the impact divided into two stages: when ΔP/P was changed from 0% to+70%, ΔS/S responded from 0% to +33%, but when ΔP/P was changed from +70% to +100%, ΔS/S responded from +33% to +25%.The results of this study provide useful information that can be used to achieve more insights into both atmospheric PM2.5 and PCDD/Fs.
Highlights
Sensitivity analysis showed that the polychlorinated dibenzofurans (PCDD/Fs) concentration was the most positively correlated sensitive factor for PM2.5-bound total PCDD/Fs-WHO2005-toxic equivalent quantity (TEQ), and when ΔP/P was changed from 0% to +50%, ΔS/S responded from 0% to +106%
The last sensitive parameter was PM2.5 concentration, with the impact divided into two stages: when ΔP/P was changed from 0% to +70%, ΔS/S responded from 0% to +33%, but when ΔP/P was changed from +70% to +100%, ΔS/S responded from +33% to +25%.The results of this study provide useful information that can be used to achieve more insights into both atmospheric PM2.5 and PCDD/Fs
PM2.5 Concentration The PM2.5 concentration has a significant correlation with air visibility and human health, but can reflect the PCDD/F concentration of a region
Summary
The particulate matter (PM) and polychlorinated dibenzop-dioxins and polychlorinated dibenzofurans (PCDD/Fs) in the ambient air have received great public concern due to their significant correlation with the incidences of pulmonary and cardiac diseases (Schwartz et al, 1996; Ito et al, 2006).Particulate matter (PM) is a suspension of solid or liquid particles in the atmosphere, which is a kind of aerosol (GhoshPCDD/Fs are well-known persistent organic pollutantsWang et al, Aerosol and Air Quality Research, 18: 407–420, 2018(POPs) and semi-volatile organic compounds (SOCs), which can transport over long distances and interact for long periods in the environment (Wu et al, 2009b; Chen et al, 2014; Lee et al, 2016; Redfern, et al, 2017), as well as bio-accumulate in the fatty tissues and bio-magnify within the food chain (Shih et al, 2009). The particulate matter (PM) and polychlorinated dibenzop-dioxins and polychlorinated dibenzofurans (PCDD/Fs) in the ambient air have received great public concern due to their significant correlation with the incidences of pulmonary and cardiac diseases (Schwartz et al, 1996; Ito et al, 2006). PCDD/Fs were detected in the emissions of municipal solid waste incinerators (MSWIs) for the first time (Olie et al, 1977), and since have become one of the most controversial environmental pollutants. Combustion processes and some industrial activities are the most dominant sources of PCDD/Fs released to the environment, such as power and heating facilities, metal smelting processes and waste incineration (Schuhmacher et al, 2000; Wang et al, 2003; Lin et al, 2007; Hsieh et al, 2009; Chuang et al, 2010, 2011). PCDD/Fs are complex mixture of different congeners, there are 210 possible congeners and 17 of these have been shown to be more toxic, with the 2,3,7,8 positions attached by chlorine atoms, and the toxicities are estimated by the toxic equivalent quantity (TEQ) (Cheruiyot, et al, 2016)
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
