Full
Outline
To investigate the indoor fine particulate matter (PM2.5) pollution and its influencing factors in children's bedrooms using solid fuel, so as to provide evidence for effective strategy to reduce PM2.5 pollution.
From December 2019 to November 2020, 198 households (108 in the north, 90 in the south) from two pilots in the north(Jiamusi in Heilongjiang Province) and south of China (Mianyang in Sichuan Province) were selected, and status of solid fuels using were obtained through home visits, dynamic changes in PM2.5 concentrations in children's bedrooms were monitored by using real-time online instruments, and the influencing factors of PM2.5 pollution were analyzed by using a mixed-effects model.
During the monitoring period, the daily PM2.5 concentrations in the northern and southern pilot were 78.33 (40.50, 154.80) and 38.54(26.20, 58.46) μg/m3, respectively, exceeding standard rates of 44.57% and 33.22%. During the heating period, the daily PM2.5 concentrations in the northern and southern pilot were 212.50(133.60, 244.10) and 104.42(73.97, 134.90) μg/m3, respectively, with over standard rates of 96.75% and 86.96%. The mixed-effects model analysis results showed that children's bedroom PM2.5 concentrations were associated with solid fuel usage duration, window opening time, room layout (shared entrance door between kitchen and bedroom), indoor smoking, indoor humidity, and solid fuel use in the bedroom (β=0.19, -0.05, 1.20, 0.43, 0.02, 0.35, all P < 0.05).
Solid fuel combustion significantly comtributes to PM2.5 pollution in children's bedrooms, with more pronounced impacts observed in northern China compared to southern regions.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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