Evaluation of Adsorbing Haze PM2.5 Fine Particulate Matters with Plants in Beijing-Tianjin-Hebei Region in China

Ji, Jing; Wang, Gang; Du, Xilong; Jin, Chi; Yang, Hailan; Liu, Jie; Yang, Qiuling; Tchouopou, Lontchi Josine; Li, Jing; Chang, Chao Cheng

doi:10.1360/052013-154

Cited by 14 publications

(5 citation statements)

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“…The intensive maize harvest and soil ploughing in autumn in the vast agricultural fields of the NCP were suspected to contribute to atmospheric Ca 2+ in Beijing. Because abundant atmospheric mineral particles were absorbed by crop leaves (Bealey et al, 2007;Ji et al, 2013) during crop growing season, especially in North China where atmospheric mineral dust is always at a high level Zhao et al, 2013b), a large fraction of the mineral dust absorbed on the leaves of crop could be released into the atmosphere during harvest with crop straw being crushed into pieces for returning to fields which is a prevailing method under the advocacy of governments for reducing the influence of crop straw burning on the air quality. Additionally, the soil ploughing can also cause the suspension of particles (Fang et al, 2006;Chen et al, 2015).…”

Section: The Sources Of Ca 2+mentioning

confidence: 99%

“…Although crop straws burning by stealth is still prevalent, most residual crops are being returned into the agricultural fields under the advocacy of government for protecting the air quality. Because crop leaves absorbed large quantities of atmospheric particles during crop growing season (Bealey et al, 2007;Ji et al, 2013), the abrupt release of the particles by smashing crop straw for returning in the vast area of the NCP must also make a contribution to atmospheric particles in the region during the seasonal harvest seasons. In winter, heavy smoke from the chimneys of the farmers' coal stoves can be seen everywhere in rural areas of the NCP due to heating supply.…”

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confidence: 99%

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The possible contribution of the periodic emissions from farmers' activities in the North China Plain to atmospheric water-soluble ions in Beijing

Liu

Zhang

et al. 2016

Atmos. Chem. Phys.

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Abstract. The North China Plain (NCP), which includes Beijing, is currently suffering from severe haze events due to a high pollution level of PM 2.5 . To mitigate the serious pollution problem, identification of the sources of PM 2.5 is urgently needed for the effective control measures. Daily samples of PM 2.5 were collected in Beijing city and in a rural area in Baoding, Hebei Province through the year of 2014, and the seasonal variation of water-soluble ions (WSIs) in PM 2.5 was comprehensively analysed to determine their possible sources. The results indicated that the periodic emissions from farmers' activities made a significant contribution to the atmospheric WSIs in Beijing. The relatively high concentration of K + in winter and autumn at the two sampling sites confirmed that crop straw burning contributed to atmospheric K + in Beijing. The remarkable elevation of Cl − at the two sampling sites as well as the evident increase of the Cl − / K + ratio and the Cl − proportion in WSIs during the winter in Beijing could be ascribed to coal combustion for heating by farmers. The unusually high ratio of Cl − to Na + in summer, the obviously high concentrations of Cl − in the rural sampling site and the elevation of Cl − proportion in WSIs in Beijing during the maize fertilization could be explained by the use of the prevailing fertilizer of NH 4 Cl in the vast area of NCP. The abnormally high concentrations of Ca 2+ at the two sampling sites and the elevation of Ca 2+ proportion during the period of the maize harvest and soil ploughing in Beijing provided convincing evidence that the intensive agricultural activities in autumn contributed to the regional mineral dust. The most serious pollution episodes in autumn were coincident with significant elevation of Ca 2+ , indicating that the mineral dust emission from the harvest and soil ploughing not only increased the atmospheric concentrations of the primary pollutants, but also greatly accelerated formation of sulfate and nitrate through heterogeneous reactions of NO 2 and SO 2 on the mineral dust. The backward trajectories also indicated that the highest concentrations of WSIs usually occurred in the air parcel from southwest-south regions, which have a high density of farmers. In addition, the values of nitrogen oxidation ratio (NOR) and the sulfur oxidation ratio (SOR) were found to be much greater under haze days than under non-haze days, implying that formation of sulfate and nitrate was greatly accelerated through heterogeneous or multiphase reactions of NO 2 and SO 2 on PM 2.5 .

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Section: The Sources Of Ca 2+mentioning

confidence: 99%

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confidence: 99%

The possible contribution of the periodic emissions from farmers' activities in the North China Plain to atmospheric water-soluble ions in Beijing

Liu

Zhang

et al. 2016

Atmos. Chem. Phys.

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“…10) Our researches proved that plant community has a good absorbed PM 2.5 capability, therefore reduce PM 2.5 concentration in atmosphere. In former times, almost of researcher thought that plant can only block PM 2.5 pollutants rely on the surface of leaf, and not understand they wether can or don't think they can absorb PM 2.5 (Ji et al, 2013;Chen et al, 2014;Zhao et al, 2016). The better community structure is, the stronger its absorbed and reduced PM 2.5 ability is.…”

Section: Discussionmentioning

confidence: 99%

Studies on Ecological Monitoring of Plant Community and Plant Diversity in Shenzhen, Southern China

Huang¹,

Yu²,

Liang³

et al. 2021

OJF

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From Jan. 2013 to Nov. 2018, we carried out the investigation on vegetation studies in the ecological monitoring programs, Shenzhen and totally researched 170 plant communities of mountain areas etc., few areas of street regions and parks etc., for communities' structural characteristics and plant diversity. We comparatively analyzed natural forests, semi-natural forest and artificial forest composition and structural characters and family, genus and species diversity level and the main affected factors. We also researched and analyzed these communities' structural characteristics and pant diversity, comparatively analyzed natural forests, semi-natural forest and artificial forest composition and structural characters and family, genus and species diversity level, the main affected factors; researched and analyzed the relationship between plant community structure characteristics with the absorbing ability to PM 2.5 pollutants. The result showed that the structure and plant diversity of natural forest were obviously better than artificial disturbed forest or artificial forest, the semi-natural forest was the middle level of the forests, In the indices of height, DBH, coverage and crow width etc. of tree layer, natural forests and semi-natural forests were obvious higher than that of artificial disturbed forest or artificial forest; in some forests of artificial disturbed forest or artificial forest, though their richness indices of family and How to cite this paper

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“…The specific empirical model is shown in formula (5). The degree of urbanization includes the data of stable light, the park green area and the total amount of public transportation [37,38]. Natural factors include the average annual temperature, average annual precipitation, average annual relative humidity, average annual sunshine hours, and average annual wind speed [39,40].…”

Section: Modelmentioning

confidence: 99%

The “Pollution Halo” Effect of FDI: Evidence from the Chinese Sichuan–Chongqing Urban Agglomeration

Gao

Pei

Zhang

et al. 2022

IJERPH

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In this paper, panel data from nineteen key cities in the Sichuan–Chongqing urban agglomeration from 2003 to 2016 were used as the study sample. Using the stochastic impacts by regression on population, affluence, and technology (STIRPAT) model, the effect of foreign direct investment (FDI) on particulate matter (PM2.5) pollution and its action mechanism in the Sichuan–Chongqing urban agglomeration were considered for both socioeconomic and natural factors. The results showed that the “pollution halo” hypothesis of FDI in the Sichuan–Chongqing urban agglomeration has been supported. There are significant positive spatial spillover effects of PM2.5 pollution in this urban agglomeration, and the introduction of FDI is conducive to alleviating PM2.5 pollution in the urban agglomeration. Similar to the “inverted U” curve proposed by the environmental Kuznets curve (EKC) hypothesis, there was a significant “inverted U” curve relationship between PM2.5 pollution and economic growth in the Sichuan–Chongqing urban agglomeration. However, there was a significant “U”-type curve relationship between the urbanization degree and the PM2.5 concentration, which indicates that the current urbanization mode may aggravate the pollution degree of PM2.5 in the urban agglomeration in the long term. Furthermore, the two natural factors of annual average temperature and annual precipitation play an important role in PM2.5 pollution and spatial spillover effect in the Sichuan–Chongqing urban agglomeration. Economic development and rationalization of the industrial structure are the main ways by which FDI affects PM2.5 pollution in the urban agglomeration. The research conclusions of this study can be of great practical significance to optimize the regional industrial layout, control PM2.5 pollution, and establish a sustainable development policy system in the Sichuan–Chongqing urban agglomeration.

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Evaluation of Adsorbing Haze PM2.5 Fine Particulate Matters with Plants in Beijing-Tianjin-Hebei Region in China

Cited by 14 publications

References 0 publications

The possible contribution of the periodic emissions from farmers' activities in the North China Plain to atmospheric water-soluble ions in Beijing

The possible contribution of the periodic emissions from farmers' activities in the North China Plain to atmospheric water-soluble ions in Beijing

Studies on Ecological Monitoring of Plant Community and Plant Diversity in Shenzhen, Southern China

The “Pollution Halo” Effect of FDI: Evidence from the Chinese Sichuan–Chongqing Urban Agglomeration

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