Spatial and seasonal variation of particulate matter (PM10 and PM2.5) in Middle Eastern classrooms

Elbayoumi, Maher; Ramli, Nor Azam; Yusof, Noor Faizah Fitri Md; Madhoun, Wesam Al

doi:10.1016/j.atmosenv.2013.07.067

Cited by 68 publications

(30 citation statements)

References 44 publications

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“…Therefore, it can persuade sever sanitary [20] and environmental concerns [15,16]. Thus, many atmospheric pollution assessment studies have been carried out in many regions to analyze the chemical composition [70], spatial and temporal variation of PM [71], and the levels of human exposure [72]. Numerous previous reports indicate that organic and/or inorganic colloids of varying sizes (1-1000 nm) in the atmosphere as well as in different compartments of the environment such as soils, lakes, streams, groundwater, rivers, and oceans play key role in the biogeochemical cycle/circulation of pollutants [73,74].…”

Section: Atmospheric Pollution By Heavy Metals and Particulate Mattermentioning

confidence: 99%

Foliar heavy metal uptake, toxicity and detoxification in plants: A comparison of foliar and root metal uptake

Shahid

Dumat

Khalid

et al. 2017

Journal of Hazardous Materials

861

297

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Anthropologic activities have transformed global biogeochemical cycling of heavy metals by emitting considerable quantities of these metals into the atmosphere from diverse sources. In spite of substantial and progressive developments in industrial processes and techniques to reduce environmental emissions, atmospheric contamination by toxic heavy metals and associated ecological and health risks are still newsworthy. Atmospheric heavy metals may be absorbed via foliar organs of plants after wet or dry deposition of atmospheric fallouts on plant canopy. Unlike root metal transfer, which has been largely studied, little is known about heavy metal uptake by plant leaves from the atmosphere. To the best of our understanding, significant research gaps exist regarding foliar heavy metal uptake. This is the first review regarding biogeochemical behaviour of heavy metals in atmosphere-plant system. The review summarizes the mechanisms involved in foliar heavy metal uptake, transfer, compartmentation, toxicity and in plant detoxification. We have described the biological and environmental factors that affect foliar uptake of heavy metals and compared the biogeochemical behaviour (uptake, translocation, compartmentation, toxicity and detoxification) of heavy metals for root and foliar uptake. The possible health risks associated with the consumption of heavy metal-laced food are also discussed.

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Section: Atmospheric Pollution By Heavy Metals and Particulate Mattermentioning

confidence: 99%

Foliar heavy metal uptake, toxicity and detoxification in plants: A comparison of foliar and root metal uptake

Shahid

Dumat

Khalid

et al. 2017

Journal of Hazardous Materials

861

297

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“…However, the ambient concentrations of PM still significantly exceed the air quality standard and particulate air pollution remains very serious. In recent years, many studies have been conducted to characterize the chemical properties of PM 2.5 in megacities (Heo et al, 2008;Pindado et al, 2009;Elbayoumi et al, 2013;Pey et al, 2013;Masiol et al, 2014), but only limited data have been reported for Shijiazhuang pollution characteristics. It is useful to investigate its spatial distribution, influencing factors, and potential sources of haze pollution.…”

Section: Introductionmentioning

confidence: 99%

Chemical Characteristics of PM2.5 during a 2016 Winter Haze Episode in Shijiazhuang, China

Chen

Zhang

Zhu

et al. 2017

Aerosol Air Qual. Res.

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To better understand the chemical characteristics and the potential source regions of PM 2.5 measured from 18 January until 22 January 2016 in Shijiazhuang, China, PM 2.5 was measured continuously and integrated daily sampling using midvolume samplers was conducted at the three sites. The mean concentration of PM 2.5 at the three sites reached 113, 131 and 119 µg m -3 during the sampling period, the higher concentrations occurred at early morning and noon, similar variation trends were found in the three sites. The concentrations of OC were higher than EC at three sampling sites and the OC/EC ratios ranged from 9.09 to 12.4 with a daily mean value of 10.8 during a haze pollution episode (HPE), which suggested that carbonaceous compositions might be from same source. The total concentration of water soluble inorganic ions (WSII) at the sites ranged from 72.2 to 100.0 µg m -3 with a mean of 84.3 µg m -3. The dominant species were NO 3 -, SO 4 2-, NH 4 + , Cl -, accounting for 88.4% of the mean PM 2.5 WSII mass. The most abundant measured element was Na with average mass concentrations of 41.5, 37.0, and 38.1 µg m -3 during the HPE. Relative humidity during HPE was higher than during clean days with average values of 70.1% and 60.2%, suggesting that high relative humidity and low wind speed favored formation of secondary inorganic ions and accelerated hygroscopic growth. The Hybrid Single Particle Lagrangian Integrated Trajectory (HYSPLIT) and a potential source contribution function (PSCF) analysis were used to assess the data. Back-trajectories for the three sites identified similar transport pathways. PSCF analysis showed a significant regional impact on PM 2.5 at Shijiazhuang during the polluted period. The potential source areas for PM 2.5 in Shijiazhuang were the Beijing-Tianjin region and Shandong Province. The results of the present study show the need for the development of PM 2.5 control measurements on a regional scale.

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“…Some studies in PRD show that the daily concentration of PM is higher in winter than in summer. Some studies also have found that the concentration of PM2.5 is higher in winter than that in other periods both in China (Zhao et al 2009), middle eastern (Elbayoumi et al 2013), USA (Lee et al 2011) and Europe (Marcazzan et al 2001). Other studies have confirmed the truth of significant differences both in temporal and spatial distribution whether in China (Li et al 2008(Li et al , 2017a or in other countries, such as Philadelphia (Burton, Suh, and Koutrakis 1996), Europe (Eeftens et al 2012).…”

Section: Introductionmentioning

confidence: 89%

Exploration of spatial and temporal characteristics of PM2.5 concentration in Guangzhou, China using wavelet analysis and modified land use regression model

Fan

Liu

2018

Geo-spatial Information Science

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This article attempts to detail time series characteristics of PM2.5 concentration in Guangzhou (China) from 1 June 2012 to 31 May 2013 based on wavelet analysis tools, and discuss its spatial distribution using geographic information system software and a modified land use regression model. In this modified model, an important variable (land use data) is substituted for impervious surface area, which can be obtained conveniently from remote sensing imagery through the linear spectral mixture analysis method. Impervious surface has higher precision than land use data because of its sub-pixel level. Seasonal concentration pattern and day-by-day change feature of PM2.5 in Guangzhou with a micro-perspective are discussed and understood. Results include: (1) the highest concentration of PM2.5 occurs in October and the lowest in July, respectively; (2) average concentration of PM2.5 in winter is higher than in other seasons; and (3) there are two high concentration zones in winter and one zone in spring.

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Spatial and seasonal variation of particulate matter (PM10 and PM2.5) in Middle Eastern classrooms

Cited by 68 publications

References 44 publications

Foliar heavy metal uptake, toxicity and detoxification in plants: A comparison of foliar and root metal uptake

Foliar heavy metal uptake, toxicity and detoxification in plants: A comparison of foliar and root metal uptake

Chemical Characteristics of PM2.5 during a 2016 Winter Haze Episode in Shijiazhuang, China

Exploration of spatial and temporal characteristics of PM2.5 concentration in Guangzhou, China using wavelet analysis and modified land use regression model

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