Atmospheric Concentration, Particle-bound Content, and Dry Deposition of PCDD/Fs
Abstract In this study, the atmospheric total-PCDD/Fs-WHO2005-TEQ concentrations, gas-particle partitioning, PM2.5 concentration, PM2.5-bound total PCDD/Fs-WHO2005-TEQ content and dry deposition flux in Shanghai and Nanjing were investigated from 2018–2020. In Shanghai, the total PCDD/Fs-WHO2005-TEQ...
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2021-04-01
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| Series: | Aerosol and Air Quality Research |
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| Online Access: | https://doi.org/10.4209/aaqr.210059 |
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| author | Fanxuan Yu Kangping Cui Hwey-Lin Sheu Yen-Kung Hsieh Xueying Tian |
| author_facet | Fanxuan Yu Kangping Cui Hwey-Lin Sheu Yen-Kung Hsieh Xueying Tian |
| author_sort | Fanxuan Yu |
| collection | DOAJ |
| description | Abstract In this study, the atmospheric total-PCDD/Fs-WHO2005-TEQ concentrations, gas-particle partitioning, PM2.5 concentration, PM2.5-bound total PCDD/Fs-WHO2005-TEQ content and dry deposition flux in Shanghai and Nanjing were investigated from 2018–2020. In Shanghai, the total PCDD/Fs-WHO2005-TEQ concentration dropped from 0.0291 pg-WHO2005-TEQ m−3 from 2018–2019 to 0.0250 pg-WHO2005-TEQ m−3 in 2020, while in Nanjing, it dropped from 0.0423 pg-WHO2005-TEQ m−3 to 0.0338 pg-WHO2005-TEQ m−3. The average concentrations of PCDD/Fs-WHO2005-TEQ in spring and winter in Shanghai and Nanjing were 47.6% and 53.8% higher than those in summer, respectively. From 2018–2019, the average particle phase fractions of total-PCDD/Fs-WHO2005-TEQ in Shanghai and Nanjing were 50.3% and 57.5%, respectively, while in 2020, they were 47.8% and 55.1%, respectively. From 2018–2019, the average PM2.5-bound total PCDD/Fs-WHO2005-TEQ content was 0.342 and 0.493 ng-WHO2005-TEQ g−1 in Shanghai and Nanjing, respectively, while in 2020, it was 0.312 and 0.489 ng-WHO2005-TEQ g−1, respectively. In Shanghai and Nanjing, the average PM2.5-bound total PCDD/Fs-WHO2005-TEQ content in spring and winter was 77.5% and 73.2% higher than that in summer, respectively. From 2018–2019, the dry deposition flux of total-PCDD/Fs-WHO2005-TEQ was 316.3 and 460.5 pg WHO2005-TEQ m−2 month−1 in Shanghai and Nanjing, respectively, while in 2020, it was 272.5 and 368.4 pg WHO2005-TEQ m−2 month−1, respectively. The average dry deposition flux of total-PCDD/Fs-WHO2005-TEQ in spring and winter was 47.6% and 53.8% higher than that summer in Shanghai and Nanjing, respectively. The above results indicate that COVID-19 in 2020 had a positive effect on air quality improvement in PCDD/Fs. On average, more than 98.88% of the total PCDD/Fs-WHO2005-TEQ dry deposition flux was primarily contributed by the particle phase. This was attributed to the fact that dry deposition of particle phase PCDD/Fs was mainly due to gravitational settling accompanied by higher dry deposition velocities, while the gas phase PCDD/Fs were deposited mostly by diffusion at a lower dry deposition velocity. |
| format | Article |
| id | doaj-art-e1140a300ead471897b4eb09fcb2e69c |
| institution | Kabale University |
| issn | 1680-8584 2071-1409 |
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| publishDate | 2021-04-01 |
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| series | Aerosol and Air Quality Research |
| spelling | doaj-art-e1140a300ead471897b4eb09fcb2e69c2025-02-09T12:20:52ZengSpringerAerosol and Air Quality Research1680-85842071-14092021-04-0121511810.4209/aaqr.210059Atmospheric Concentration, Particle-bound Content, and Dry Deposition of PCDD/FsFanxuan Yu0Kangping Cui1Hwey-Lin Sheu2Yen-Kung Hsieh3Xueying Tian4School of Resources and Environmental Engineering, Hefei University of TechnologySchool of Resources and Environmental Engineering, Hefei University of TechnologyDepartment of Environmental Engineering, Kun Shan UniversityMarine Ecology and Conservation Research Center, National Academy of Marine ResearchSchool of Resources and Environmental Engineering, Hefei University of TechnologyAbstract In this study, the atmospheric total-PCDD/Fs-WHO2005-TEQ concentrations, gas-particle partitioning, PM2.5 concentration, PM2.5-bound total PCDD/Fs-WHO2005-TEQ content and dry deposition flux in Shanghai and Nanjing were investigated from 2018–2020. In Shanghai, the total PCDD/Fs-WHO2005-TEQ concentration dropped from 0.0291 pg-WHO2005-TEQ m−3 from 2018–2019 to 0.0250 pg-WHO2005-TEQ m−3 in 2020, while in Nanjing, it dropped from 0.0423 pg-WHO2005-TEQ m−3 to 0.0338 pg-WHO2005-TEQ m−3. The average concentrations of PCDD/Fs-WHO2005-TEQ in spring and winter in Shanghai and Nanjing were 47.6% and 53.8% higher than those in summer, respectively. From 2018–2019, the average particle phase fractions of total-PCDD/Fs-WHO2005-TEQ in Shanghai and Nanjing were 50.3% and 57.5%, respectively, while in 2020, they were 47.8% and 55.1%, respectively. From 2018–2019, the average PM2.5-bound total PCDD/Fs-WHO2005-TEQ content was 0.342 and 0.493 ng-WHO2005-TEQ g−1 in Shanghai and Nanjing, respectively, while in 2020, it was 0.312 and 0.489 ng-WHO2005-TEQ g−1, respectively. In Shanghai and Nanjing, the average PM2.5-bound total PCDD/Fs-WHO2005-TEQ content in spring and winter was 77.5% and 73.2% higher than that in summer, respectively. From 2018–2019, the dry deposition flux of total-PCDD/Fs-WHO2005-TEQ was 316.3 and 460.5 pg WHO2005-TEQ m−2 month−1 in Shanghai and Nanjing, respectively, while in 2020, it was 272.5 and 368.4 pg WHO2005-TEQ m−2 month−1, respectively. The average dry deposition flux of total-PCDD/Fs-WHO2005-TEQ in spring and winter was 47.6% and 53.8% higher than that summer in Shanghai and Nanjing, respectively. The above results indicate that COVID-19 in 2020 had a positive effect on air quality improvement in PCDD/Fs. On average, more than 98.88% of the total PCDD/Fs-WHO2005-TEQ dry deposition flux was primarily contributed by the particle phase. This was attributed to the fact that dry deposition of particle phase PCDD/Fs was mainly due to gravitational settling accompanied by higher dry deposition velocities, while the gas phase PCDD/Fs were deposited mostly by diffusion at a lower dry deposition velocity.https://doi.org/10.4209/aaqr.210059PCDD/FsPM2.5Particle-boundPhase distributionDry deposition |
| spellingShingle | Fanxuan Yu Kangping Cui Hwey-Lin Sheu Yen-Kung Hsieh Xueying Tian Atmospheric Concentration, Particle-bound Content, and Dry Deposition of PCDD/Fs Aerosol and Air Quality Research PCDD/Fs PM2.5 Particle-bound Phase distribution Dry deposition |
| title | Atmospheric Concentration, Particle-bound Content, and Dry Deposition of PCDD/Fs |
| title_full | Atmospheric Concentration, Particle-bound Content, and Dry Deposition of PCDD/Fs |
| title_fullStr | Atmospheric Concentration, Particle-bound Content, and Dry Deposition of PCDD/Fs |
| title_full_unstemmed | Atmospheric Concentration, Particle-bound Content, and Dry Deposition of PCDD/Fs |
| title_short | Atmospheric Concentration, Particle-bound Content, and Dry Deposition of PCDD/Fs |
| title_sort | atmospheric concentration particle bound content and dry deposition of pcdd fs |
| topic | PCDD/Fs PM2.5 Particle-bound Phase distribution Dry deposition |
| url | https://doi.org/10.4209/aaqr.210059 |
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