Inhibition Behavior of PCDD/Fs Congeners by Addition of N-containing Compound in the Iron Ore Sintering
Abstract PCDD/Fs are typical toxic persistent aromatic compounds that greatly reduce air quality and harm human health. In this study, urea’s suppressive effect on PCDD/Fs and their congener emissions was investigated via sintering pot tests, and the inhibition mechanisms were studied. The results s...
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| Format: | Article |
| Language: | English |
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Springer
2020-05-01
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| Series: | Aerosol and Air Quality Research |
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| Online Access: | https://doi.org/10.4209/aaqr.2019.12.0660 |
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| author | Yifan Wang Lixin Qian Zhengwei Yu Tiejun Chun Hongming Long Xuejian Wu Jiaxin Li |
| author_facet | Yifan Wang Lixin Qian Zhengwei Yu Tiejun Chun Hongming Long Xuejian Wu Jiaxin Li |
| author_sort | Yifan Wang |
| collection | DOAJ |
| description | Abstract PCDD/Fs are typical toxic persistent aromatic compounds that greatly reduce air quality and harm human health. In this study, urea’s suppressive effect on PCDD/Fs and their congener emissions was investigated via sintering pot tests, and the inhibition mechanisms were studied. The results showed that the I-TEQ values for the total PCDD/Fs decreased from 0.50 to 0.20, 0.12 and 0.20 ng I-TEQ Nm−3 after adding solid 0.02, 0.035 and 0.05 wt.% urea particles, respectively, to the iron ore sintering mixture, but these values increased for the low-chlorinated TeCDFs (from 0.003 to 0.009, 0.006 and 0.006 ng I-TEQ Nm−3) and TeCDDs (from 0.014 to 0.020, 0.018 and 0.020 ng I-TEQ Nm−3). Moreover, the average I-TEQ values for the chlorine substituents in the PCDFs and PCDDs decreased, indicating that urea inhibited chlorination or enhanced dechlorination. The potential mechanisms by which urea suppresses the total PCDD/Fs and hydrodechlorinates the high-chlorinated PCDD/Fs are discussed. |
| format | Article |
| id | doaj-art-a44ec8c1a04b427ca05789ee67963ac8 |
| institution | Kabale University |
| issn | 1680-8584 2071-1409 |
| language | English |
| publishDate | 2020-05-01 |
| publisher | Springer |
| record_format | Article |
| series | Aerosol and Air Quality Research |
| spelling | doaj-art-a44ec8c1a04b427ca05789ee67963ac82025-02-09T12:19:18ZengSpringerAerosol and Air Quality Research1680-85842071-14092020-05-0120112568257910.4209/aaqr.2019.12.0660Inhibition Behavior of PCDD/Fs Congeners by Addition of N-containing Compound in the Iron Ore SinteringYifan Wang0Lixin Qian1Zhengwei Yu2Tiejun Chun3Hongming Long4Xuejian Wu5Jiaxin Li6School of Metallurgical Engineering, Anhui University of TechnologySchool of Metallurgical Engineering, Anhui University of TechnologySchool of Metallurgical Engineering, Anhui University of TechnologySchool of Metallurgical Engineering, Anhui University of TechnologySchool of Metallurgical Engineering, Anhui University of TechnologySchool of Metallurgical Engineering, Anhui University of TechnologySchool of Metallurgical Engineering, Anhui University of TechnologyAbstract PCDD/Fs are typical toxic persistent aromatic compounds that greatly reduce air quality and harm human health. In this study, urea’s suppressive effect on PCDD/Fs and their congener emissions was investigated via sintering pot tests, and the inhibition mechanisms were studied. The results showed that the I-TEQ values for the total PCDD/Fs decreased from 0.50 to 0.20, 0.12 and 0.20 ng I-TEQ Nm−3 after adding solid 0.02, 0.035 and 0.05 wt.% urea particles, respectively, to the iron ore sintering mixture, but these values increased for the low-chlorinated TeCDFs (from 0.003 to 0.009, 0.006 and 0.006 ng I-TEQ Nm−3) and TeCDDs (from 0.014 to 0.020, 0.018 and 0.020 ng I-TEQ Nm−3). Moreover, the average I-TEQ values for the chlorine substituents in the PCDFs and PCDDs decreased, indicating that urea inhibited chlorination or enhanced dechlorination. The potential mechanisms by which urea suppresses the total PCDD/Fs and hydrodechlorinates the high-chlorinated PCDD/Fs are discussed.https://doi.org/10.4209/aaqr.2019.12.0660PCDD/FsCongenersUreaActive radicalIron ore sintering |
| spellingShingle | Yifan Wang Lixin Qian Zhengwei Yu Tiejun Chun Hongming Long Xuejian Wu Jiaxin Li Inhibition Behavior of PCDD/Fs Congeners by Addition of N-containing Compound in the Iron Ore Sintering Aerosol and Air Quality Research PCDD/Fs Congeners Urea Active radical Iron ore sintering |
| title | Inhibition Behavior of PCDD/Fs Congeners by Addition of N-containing Compound in the Iron Ore Sintering |
| title_full | Inhibition Behavior of PCDD/Fs Congeners by Addition of N-containing Compound in the Iron Ore Sintering |
| title_fullStr | Inhibition Behavior of PCDD/Fs Congeners by Addition of N-containing Compound in the Iron Ore Sintering |
| title_full_unstemmed | Inhibition Behavior of PCDD/Fs Congeners by Addition of N-containing Compound in the Iron Ore Sintering |
| title_short | Inhibition Behavior of PCDD/Fs Congeners by Addition of N-containing Compound in the Iron Ore Sintering |
| title_sort | inhibition behavior of pcdd fs congeners by addition of n containing compound in the iron ore sintering |
| topic | PCDD/Fs Congeners Urea Active radical Iron ore sintering |
| url | https://doi.org/10.4209/aaqr.2019.12.0660 |
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