Optical properties and source identification of black carbon and brown carbon: comparison of winter and summer haze episodes in Xi'an, Northwest China

2019 ◽  
Vol 21 (12) ◽  
pp. 2058-2069 ◽  
Author(s):  
Qian Zhang ◽  
Zhenxing Shen ◽  
Yali Lei ◽  
Tian Zhang ◽  
Yaling Zeng ◽  
...  
Keyword(s):  
Optical Properties ◽  
Particulate Matter ◽  
Black Carbon ◽  
Seasonal Variations ◽  
Source Identification ◽  
Fine Particulate Matter ◽  
Northwest China ◽  
Brown Carbon ◽  
Fine Particulate ◽  
Insight Into

Summer and winter fine particulate matter (PM2.5) samples were collected to provide insight into the seasonal variations of the optical properties and source profiles of PM2.5 black carbon (BC) and brown carbon (BrC) in Xi'an, China.

Extreme concentrations of fine particulate matter and black carbon during commute

2020 ◽  
Author(s):  
Veronika S. Brand ◽  
Thiago Nogueira ◽  
Prashant Kumar ◽  
Maria de Fatima Andrade
Keyword(s):  
Particulate Matter ◽  
Black Carbon ◽  
Extreme Values ◽  
Fine Particulate Matter ◽  
Extreme Value Distribution ◽  
Road Vehicles ◽  
Adverse Health Effects ◽  
Fine Particulate ◽  
Commuter Exposure ◽  
Evening Peak

<p>Commuters are vulnerable to traffic air pollutants, especially to fine particulate matter (PM<sub>2.5</sub>) and black carbon (BC) because of their proximity to on-road vehicles. Both pollutants have been extensively associated to adverse health effects (i.e., stroke, diabetes, cardiovascular and respiratory diseases, and cancer). Therefore, this work aims to investigate the extreme concentrations of PM<sub>2.5</sub> and BC occurrence in commuters in the megacity of São Paulo, Brazil. We carried out a field campaign measuring the commuter exposure to PM<sub>2.5</sub> and BC concentrations inside buses, cars and undergrounds in São Paulo during morning and evening peak-hours. We fitted an Extreme Value Distribution to the collected data to investigate the behavior of the extreme values in the different transport modes and periods of the day. The results suggest that higher concentrations of PM<sub>2.5</sub> and BC occur more frequently inside buses, followed by cars and undergrounds. Extreme concentrations for both pollutants are more likely to happen during morning peak-hours when compared to evening peak-hours. Our findings add further evidence that the transport mode and period of the day affect substantially the PM<sub>2.5</sub> and BC exposure in commuters. Furthermore, the results are quite useful for supporting urban policies that consider the improvement of the efficiency of air filtering systems inside public transport and private cars.</p>

Potential exposure to fine particulate matter (PM2.5) and black carbon on jogging trails in Macau

2019 ◽  
Vol 198 ◽  
pp. 23-33 ◽  
Author(s):  
Ben Liu ◽  
Mandy Minle He ◽  
Cheng Wu ◽  
Jinjian Li ◽  
Ying Li ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Black Carbon ◽  
Fine Particulate Matter ◽  
Potential Exposure ◽  
Fine Particulate
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