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| 论文编号: |
39 |
| 论文题目: |
Changes in concentration, composition and source contribution of atmospheric organic aerosols by shifting coal to natural gas in Urumqi |
| 英文论文题目: |
Changes in concentration, composition and source contribution of atmospheric organic aerosols by shifting coal to natural gas in Urumqi |
| 第一作者: |
Ren, YQ |
| 英文第一作者: |
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| 联系作者: |
Wang Gehui |
| 英文联系作者: |
Wang Gehui |
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| 发表年度: |
2017 |
| 卷: |
148 |
| 期: |
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| 页码: |
306-315 |
| 摘要: |
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| 英文摘要: |
Size-segregated aerosols were collected in Urumqi, a megacity in northwest China, during two heating seasons, i.e., before (heating season I: January March 2012) and after (heating season II: January March 2014) the project "shifting coal to natural gas", and determined for n-alkanes, PAHs and oxygenated PAHs to investigate the impact of replacement of coal by natural gas on organic aerosols in the urban atmosphere. Our results showed that compared to those in heating season I concentrations of n-alkanes, PAHs and OPAHs decreased by 74%, 74% and 82% in heating season II, respectively. Source apportionment analysis suggested that coal combustion, traffic emission and biomass burning are the major sources of the determined organics during the heating seasons in Urumqi. Traffic emission is the main source for n-alkanes in the city. Coal combustion is the dominant source of PAHs and OPAHs in heating season I, but traffic emission becomes their major source in heating season II. Relative contributions of coal combustion to n-alkanes, PAHs and OPAHs in Urumqi decreased from 21 to 75% in heating season I to 4.0 -21% in heating season II due to the replacement of coal with natural gas for house heating. Health risk assessment further indicated that compared with that in heating season I the number of lung cancer related to PAHs exposure in Urumqi decreased by 73% during heating season II due to the project implementation. Our results suggest that replacing coal by clean energy sources for house heating will significantly mitigate air pollution and improve human health in China. |
| 刊物名称: |
Atmospheric Environment |
| 英文刊物名称: |
Atmospheric Environment |
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| 全文链接: |
http://www.sciencedirect.com/science/article/pii/S1352231016308603 |
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