Fractionation of airborne particulate-bound elements in haze-fog episode and associated health risks in a megacity of southeast China
| Autor: | Yixuan Sun, Hongfei Wu, Min Shao, Fengying Li, Qin'geng Wang, Cheng Wang, Huiming Li, Xin Qian, Meng Yang, Jinhua Wang |
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| Rok vydání: | 2016 |
| Předmět: |
China
Haze genetic structures 010504 meteorology & atmospheric sciences Health Toxicology and Mutagenesis Fractionation Chemical Fractionation 010501 environmental sciences Toxicology Risk Assessment 01 natural sciences Atmosphere Metals Heavy Humans Cities Particle Size Noncarcinogenic risk Weather 0105 earth and related environmental sciences Air Pollutants Air Chemical fractionation General Medicine Particulates Pollution eye diseases Bioavailability Megacity Environmental chemistry Environmental science Particulate Matter Seasons sense organs Environmental Monitoring |
| Zdroj: | Environmental Pollution. 208:655-662 |
| ISSN: | 0269-7491 |
| Popis: | Haze caused by high particulate matter loadings is an important environmental issue. PM2.5 was collected in Nanjing, China, during a severe haze-fog event and clear periods. The particulate-bound elements were chemically fractionated using sequential extractions. The average PM2.5 concentration was 3.4 times higher during haze-fog (96-518 μg/m(3)) than non-haze fog periods (49-142 μg/m(3)). Nearly all elements showed significantly higher concentrations during haze-fog than non-haze fog periods. Zn, As, Pb, Cd, Mo and Cu were considered to have higher bioavailability and enrichment degree in the atmosphere. Highly bioavailable fractions of elements were associated with high temperatures. The integrated carcinogenic risk for two possible scenarios to individuals exposed to metals was higher than the accepted criterion of 10(-6), whereas noncarcinogenic risk was lower than the safe level of 1. Residents of a city burdened with haze will incur health risks caused by exposure to airborne metals. |
| Databáze: | OpenAIRE |
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