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To investigate the impact of chemical components in multi-size particulate matter on mortality risk from circulatory system diseases, and to provide evidence for establishing refined air pollution control strategies.
Based on mortality data for circulatory system diseases in Tianjin from 2019 to 2022, integrated with multi-size particulate matter component profiles and meteorological parameters, a generalized linear regression model based on quasi-Poisson distribution was constructed to quantitatively assess the differential contributions of particulate matter components across size ranges to mortality risk.
During the study period, 37 416 circulatory system disease deaths were recorded, with a weekly average mortality of 393.85±93.70 cases. The health effects of particulate matter were most pronounced in the 1.1- 2.1 μm size range, where a 1 interquartile range (IQR) increase was associated with a 6.83% (95%CI: 1.25%-12.72%) elevation in circulatory mortality risk. Component-specific analyses identified chloride ions, potassium, chromium, titanium, and cadmium as significantly correlated with circulatory mortality. Smaller particle sizes exhibited greater toxicity, with heightened sensitivity observed in females and individuals over 65 years old.
Particulate matter health effects demonstrate significant size-dependent characteristics, with diminishing particle sizes correlating to increased toxic complexity. Targeted control strategies are recommended, prioritizing metal components and secondary inorganic ions in particles below 2.5μm.
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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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