Characteristics of water soluble inorganic ions in PM<sub>2.5</sub> in winter of Beijing in typical urban areas
In order to fully understand the inorganic water-soluble ions and their sources in the atmospheric fine particles PM<sub>2.5</sub> in Beijing after coal-to-gas conversion, 41 PM<sub>2.5</sub> samples were continuously collected in Haidian District of Beijing during the winter...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Emergency Management Press
2020-04-01
|
| Series: | 矿业科学学报 |
| Subjects: | |
| Online Access: | http://kykxxb.cumtb.edu.cn/article/id/283 |
| _version_ | 1811223271162511360 |
|---|---|
| author | Shi Yunyun Yang Ou Yang Qiaowen Liang Handong Ma Yongwei |
| author_facet | Shi Yunyun Yang Ou Yang Qiaowen Liang Handong Ma Yongwei |
| author_sort | Shi Yunyun |
| collection | DOAJ |
| description | In order to fully understand the inorganic water-soluble ions and their sources in the atmospheric fine particles PM<sub>2.5</sub> in Beijing after coal-to-gas conversion, 41 PM<sub>2.5</sub> samples were continuously collected in Haidian District of Beijing during the winter heating period in 2017.The concentrations of 10 kinds of water-soluble ions(Na<sup>+</sup>, NH<sub>4</sub><sup>+</sup>, K<sup>+</sup>, Ca<sup>2+</sup>, Mg<sup>2+</sup>, F<sup>-</sup>, Cl<sup>-</sup>, NO<sub>2</sub><sup>-</sup>, NO<sub>3</sub><sup>-</sup>, SO<sub>4</sub><sup>2-</sup>)were analyzed by ion chromatography.The results show that the daily average mass concentration of PM<sub>2.5</sub> in Beijing during the sampling period is (94.28±52.49) μg/m<sup>3</sup>.Compared with the winter of 2016, the average daily PM<sub>2.5</sub> concentration in Beijing in 2017 decreased by 29 μg/m<sup>3</sup>, with a decrease of 28.2%, and the number of pollution days decreased significantly.During the pollution period, NO<sub>3</sub><sup>-</sup>, SO<sub>4</sub><sup>2-</sup>, and NH<sub>4</sub><sup>+</sup>in the particulate matter were significantly higher than the clean period.The ratio of the concentration of <i>ρ</i>(NO<sub>3</sub><sup>-</sup>)/<i>ρ</i>(SO<sub>4</sub><sup>2-</sup>) is greater than 1, and the contribution of the mobile source is relatively large, reflecting that the implementation of the "coal to gas" policy has contributed to the reduction of sulfate emissions from fixed sources such as coal.Time-of-flight secondary ion mass spectrometry(TOF-SIMS) was combined with mass high resolution mode and positive and negative ion imaging mode to characterize PM<sub>2.5</sub>.The results show that NH<sub>4</sub><sup>+</sup>tends to exist in the form of molecular ammonium sulfate or ammonium hydrogen sulfate during the pollution period. |
| first_indexed | 2024-04-12T08:30:03Z |
| format | Article |
| id | doaj.art-dfb087aee9304171b2ac55d9d72d57f2 |
| institution | Directory Open Access Journal |
| issn | 2096-2193 |
| language | English |
| last_indexed | 2024-04-12T08:30:03Z |
| publishDate | 2020-04-01 |
| publisher | Emergency Management Press |
| record_format | Article |
| series | 矿业科学学报 |
| spelling | doaj.art-dfb087aee9304171b2ac55d9d72d57f22022-12-22T03:40:14ZengEmergency Management Press矿业科学学报2096-21932020-04-015221923110.19606/j.cnki.jmst.2020.02.01120200211Characteristics of water soluble inorganic ions in PM<sub>2.5</sub> in winter of Beijing in typical urban areasShi Yunyun0Yang Ou1Yang Qiaowen2Liang Handong3Ma Yongwei4State Key Laboratory of Coal Resources and Safe Mining, Beijing, Beijing 100083, ChinaState Key Laboratory of Coal Resources and Safe Mining, Beijing, Beijing 100083, ChinaSchool of Chemical & Environmental Engineering, China University of Mining & Technology-Beijing 100083, ChinaState Key Laboratory of Coal Resources and Safe Mining, Beijing, Beijing 100083, ChinaQingdao Lu Hai Photoelectric Technology Co., Ltd. Qingdao Shandong 266200, ChinaIn order to fully understand the inorganic water-soluble ions and their sources in the atmospheric fine particles PM<sub>2.5</sub> in Beijing after coal-to-gas conversion, 41 PM<sub>2.5</sub> samples were continuously collected in Haidian District of Beijing during the winter heating period in 2017.The concentrations of 10 kinds of water-soluble ions(Na<sup>+</sup>, NH<sub>4</sub><sup>+</sup>, K<sup>+</sup>, Ca<sup>2+</sup>, Mg<sup>2+</sup>, F<sup>-</sup>, Cl<sup>-</sup>, NO<sub>2</sub><sup>-</sup>, NO<sub>3</sub><sup>-</sup>, SO<sub>4</sub><sup>2-</sup>)were analyzed by ion chromatography.The results show that the daily average mass concentration of PM<sub>2.5</sub> in Beijing during the sampling period is (94.28±52.49) μg/m<sup>3</sup>.Compared with the winter of 2016, the average daily PM<sub>2.5</sub> concentration in Beijing in 2017 decreased by 29 μg/m<sup>3</sup>, with a decrease of 28.2%, and the number of pollution days decreased significantly.During the pollution period, NO<sub>3</sub><sup>-</sup>, SO<sub>4</sub><sup>2-</sup>, and NH<sub>4</sub><sup>+</sup>in the particulate matter were significantly higher than the clean period.The ratio of the concentration of <i>ρ</i>(NO<sub>3</sub><sup>-</sup>)/<i>ρ</i>(SO<sub>4</sub><sup>2-</sup>) is greater than 1, and the contribution of the mobile source is relatively large, reflecting that the implementation of the "coal to gas" policy has contributed to the reduction of sulfate emissions from fixed sources such as coal.Time-of-flight secondary ion mass spectrometry(TOF-SIMS) was combined with mass high resolution mode and positive and negative ion imaging mode to characterize PM<sub>2.5</sub>.The results show that NH<sub>4</sub><sup>+</sup>tends to exist in the form of molecular ammonium sulfate or ammonium hydrogen sulfate during the pollution period.http://kykxxb.cumtb.edu.cn/article/id/283pm<sub>2.5</sub> in winterwater-soluble ionsion chromatographytime of flight secondary ion mass spectrum(tof-sims) |
| spellingShingle | Shi Yunyun Yang Ou Yang Qiaowen Liang Handong Ma Yongwei Characteristics of water soluble inorganic ions in PM<sub>2.5</sub> in winter of Beijing in typical urban areas 矿业科学学报 pm<sub>2.5</sub> in winter water-soluble ions ion chromatography time of flight secondary ion mass spectrum(tof-sims) |
| title | Characteristics of water soluble inorganic ions in PM<sub>2.5</sub> in winter of Beijing in typical urban areas |
| title_full | Characteristics of water soluble inorganic ions in PM<sub>2.5</sub> in winter of Beijing in typical urban areas |
| title_fullStr | Characteristics of water soluble inorganic ions in PM<sub>2.5</sub> in winter of Beijing in typical urban areas |
| title_full_unstemmed | Characteristics of water soluble inorganic ions in PM<sub>2.5</sub> in winter of Beijing in typical urban areas |
| title_short | Characteristics of water soluble inorganic ions in PM<sub>2.5</sub> in winter of Beijing in typical urban areas |
| title_sort | characteristics of water soluble inorganic ions in pm sub 2 5 sub in winter of beijing in typical urban areas |
| topic | pm<sub>2.5</sub> in winter water-soluble ions ion chromatography time of flight secondary ion mass spectrum(tof-sims) |
| url | http://kykxxb.cumtb.edu.cn/article/id/283 |
| work_keys_str_mv | AT shiyunyun characteristicsofwatersolubleinorganicionsinpmsub25subinwinterofbeijingintypicalurbanareas AT yangou characteristicsofwatersolubleinorganicionsinpmsub25subinwinterofbeijingintypicalurbanareas AT yangqiaowen characteristicsofwatersolubleinorganicionsinpmsub25subinwinterofbeijingintypicalurbanareas AT lianghandong characteristicsofwatersolubleinorganicionsinpmsub25subinwinterofbeijingintypicalurbanareas AT mayongwei characteristicsofwatersolubleinorganicionsinpmsub25subinwinterofbeijingintypicalurbanareas |