Effects of local, regional meteorology and emission sources on mass and compositions of particulate matter in Hanoi

Hai, Cao Dung; Oanh, Nguyen Thi Kim

doi:10.1016/j.atmosenv.2012.05.006

Cited by 96 publications

(69 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…13. The trend of PM 2.5 decreasing can be a seasonal reduction of total emissions (Hai and Oanh, 2013). The average PM 2.5 from 22 May to 19 June of 2015 was 45 ± 18 µg m -3 , comparable to that for the haze episode of our study in Ba Vi province.…”

Section: Aerosol Evolution and Composition In Hanoisupporting

confidence: 59%

“…Wind speeds were low and quite stable, ranging from 1.5 to 2.5 m s -1 . Analysis of daily wind roses shows that predominant wind direction between 27 May and 14 June 2015 was northeast and southeast, typical for the period of monsoon season changing during this time of the year (Hai and Oanh, 2013). There was no correlation between daily PM 10 and wind speed observed.…”

Section: Regional Aerosol In Ba VI Region Pm 10 Evolutionmentioning

confidence: 76%

“…Sulfate ions were predominant, comprising 24 and 32% of TWSI, respectively (Fig. 5), as expected from fossil fuel combustion and especially in the traffic samples collected road-side in large cities (Hai and Oanh, 2013 (Popovicheva et al, 2014b). Finally, acetate ions dominate among organic ions in both emissions, in contrast to rice straw burning emissions in which formate is the most abundant carboxylate ion.…”

Section: On-field Burning Traffic and Cooking Sourcesmentioning

confidence: 88%

“…Since Fe, Mn, and Ti are mainly distributed in the coarse fraction of soil-derived particles, their main source in the Ba Vi region could be soil dust remobilized by fires. The abundance of hazardous trace metals such as Ni, Cr, and Zn (Hai and Oanh, 2013) were enhanced by anthropogenic dust, and their variability was measured at the Ba Vi site to be higher than in any other source analyzed. The presence of elements such as Fe, Cr, Pb, and Mn may also be linked to coal combustion and industrial activities (Hai and Oanh, 2013).…”

Section: Aerosol Chemistrymentioning

confidence: 99%

“…Various components of traffic-emitted aerosols are considered as dangerous pollutants with respect to human health, causing respiratory and cardiovascular diseases (Hien et al, 2007;Steiner et al, 2013). Residential cooking emissions are a key source of PM especially in winter when urban emissions are dominant (Hai and Oanh, 2013). Surrounding agricultural areas of Hanoi can act as a seasonal source of pollution during intense rice straw burning in the weeks following harvest periods, [kenh14.vn].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Aerosol Pollutants during Agricultural Biomass Burning: A Case Study in Ba Vi Region in Hanoi, Vietnam

Popovicheva

Shonija

Persiantseva

et al. 2017

Aerosol Air Qual. Res.

View full text Add to dashboard Cite

Impact of traditional biomass burning activities on regional air quality is a major environmental concern. Measurement campaigns were performed during post-harvesting activities in the Ba Vi region in Hanoi in May-June of 2015 and 2016. To quantify the source for regional haze the sampling of rice straw burning emissions was performed on fields. Carbonaceous (OC, EC, BrC) fractions, heavy metals, organic and ionic composition, and microstructure were characterized. A set of functionalities (hydroxyl, aliphatic, carbonyl, carboxylate, and nitro groups) revealed a functional marker of pile combustion. Optical, microstructural, and chemical analyses of environmentally-dangerous pollutants from traffic and cooking sources provided characteristics and functional markers of different pollution sources. Chemical features of rice straw burning were identified on the Ba Vi site during the haze episode of 2015, when PM 10 mass approached the high smoke intensity, up to 167 µg m -3 . Small-scale meteorology affected PM 10 , OC and EC, and ion mass in days of highest relative humidity and fogs. In days of highest smoke OC dominated PM 10 mass by up to 42%, the OC/EC ratio approached 20, in line with observations of mainly smoldering emissions across the fields. Spectral features of regional haze smoke demonstrated the absorption of rice straw burning whereas the impact of biogenic, traffic, and cooking sources were significantly lower. Individual particle analyses showed carbonaceous particles internally/externally mixed with inorganic fly ash and dust. Smoke micromarkers revealed the microstructure of regional aerosols representative for Southeast Asia in BB periods. Significantly lower PM 10 mass concentrations and strong difference in aerosol composition before post-harvesting activities suggested that agricultural burning represents a large contribution to air quality degradation in the rural area of Vietnam.

show abstract

Section: Aerosol Evolution and Composition In Hanoisupporting

confidence: 59%

Section: Regional Aerosol In Ba VI Region Pm 10 Evolutionmentioning

confidence: 76%