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Journal articles on the topic 'Air pollutant dispersal'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 February 2022

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1

Zhang, Yiyang, Jing Wang, and Lingbing Bu. "Analysis of a Haze Event over Nanjing, China Based on Multi-Source Data." Atmosphere 10, no. 6 (2019): 338. http://dx.doi.org/10.3390/atmos10060338.

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We analyzed a June 2018 Nanjing, China haze event using ground-based and spaceborne sensors, combined with sounding and HYSPLIT backward trajectory data, with the ground-based and spaceborne sensor data exhibiting good consistency. Water vapor content showed significant positive correlation with AOD (aerosol optical depth), and AOD measured in urban and industrial areas was much higher compared to other similar zones. The afternoon convection caused the aerosol uplift during the haze event. Higher aerosol concentration was detected below 2 km. Due to the summer afternoon convective movement, p

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Opara, Alex Iheanyichukwu, Francis Chizoruo Ibe, Pascal Chukwuemeka Njoku, Jude Ikechukwu Alinnor, and Conrad Kenechukwu Enenebeaku. "Geospatial and Geostatistical Analyses of Particulate Matter (PM₁₀) Concentrations in Imo State, Nigeria." International Letters of Natural Sciences 57 (August 2016): 89–107. http://dx.doi.org/10.18052/www.scipress.com/ilns.57.89.

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Geospatial and geostatistical analysis of particulate matter (PM10) variation in Imo State, Nigeria was carried out. The objectives of the study were to determine and analyze the variation in concentration of ambient PM10level in Imo State, Nigeria. Air quality sampling was conducted within November 2014 and June 2015, in wet and dry seasons three times daily using Haze Dust Particulate Monitor (10μm). The mean concentration of PM10level observed in the study varied from 5.22 - 6.63 mg/m3in wet season and 5.80 - 8.38 mg/m3in dry season. Coefficient of variation (CV %) revealed that the variabi

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Vike, Eva. "Air-pollutant dispersal patterns and vegetation damage in the vicinity of three aluminium smelters in Norway." Science of The Total Environment 236, no. 1-3 (1999): 75–90. http://dx.doi.org/10.1016/s0048-9697(99)00268-5.

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Malloy, Jonny William, and Randall S. Cerveny. "Atmospheric Composite Sounding Analysis as a Forecasting Tool for Ozone Accumulation in a Semiarid Metropolitan Area during the North America Monsoon: Phoenix, Arizona." Weather and Forecasting 34, no. 4 (2019): 887–904. http://dx.doi.org/10.1175/waf-d-18-0204.1.

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Abstract Phoenix, Arizona, observes a high summertime frequency for daily maximum 8-h ozone averages (DMO8) exceeding 70 parts per billion, resulting in nonattainment status by the U.S. Environmental Protection Agency. This study discusses the use of composite atmospheric sounding analysis (constructing average sounding conditions for specific recurring events) to forecast different air quality index daily ozone classifications, including “good,” “moderate,” and collectively categories exceeding the 2015 ozone standard. Composite sounding analysis, using the Phoenix 1200 UTC (0500 LST) rawinso

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Suprunova, A. A., L. T. Krupskaya, and T. G. Borzenkova. "Peculiarities of Recultivating the Ash Dump of Power Station-1 in the City of Khabarovsk." Advanced Materials Research 1051 (October 2014): 444–47. http://dx.doi.org/10.4028/www.scientific.net/amr.1051.444.

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The article presents the results of the research work on the peculiarities of recultivation of the ash dumps of power station No1 (PS1) in the city of Khabarovsk. The research showed that the climatic conditions of the region promote the dust dispersal of toxic agents from the surface of the ash dump. The pollution of the air basin here can be attributed to the extremely high level of pollution (EHP), the priority pollutant is the dust containing heightened concentrations of heavy metals (Pb, Mn, Cu, Cr, Co, Ni, Cd). As a result it leads to the deterioration of the population’s health, especia

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Meintrup, David, and Chang Woon Nam. "Shadow Market Area for Air Pollutants." Environment and Planning B: Planning and Design 36, no. 4 (2009): 664–81. http://dx.doi.org/10.1068/b34053.

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This study identifies the shadow market area of air pollutants on the basis of the Gaussian plume model. Since pollutants are dispersed by wind, transport costs are irrelevant in its formation. Pollutant distribution on the ground level has an asymmetric bell shape in the wind direction. In addition to the linear functions, the exponential and quadratic shadow price functions are considered for the compensation of a health hazard to consumers, where the strict liability in the framework of the Coase theorem applies. The shadow market area for pollutants is shell shaped. This specific character

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BEBKIEWICZ, Katarzyna, Zdzisław CHŁOPEK, Jakub LASOCKI, Krystian SZCZEPAŃSKI, and Magdalena ZIMAKOWSKA-LASKOWSKA. "Characteristics of pollutant emission from motor vehicles for the purposes of the Central Emission Database in Poland." Combustion Engines 177, no. 2 (2019): 165–71. http://dx.doi.org/10.19206/ce-2019-229.

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Within the Institute of Environmental Protection – National Research Institute the Central Emission Database is being established. The Database will cover the most important emission sectors from anthropogenic activities, including usage of motor vehicles. The intensity of emissions of individual pollutants is the input data to air pollution dispersion models. Based on calculations performed by the air pollution dispersion models concentration of pollutants dispersed in atmospheric air (pollution immission) is provided. The annual average immision for a selected place in Poland is a measure of

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Wang, H., M. Xue, X. Y. Zhang, et al. "Mesoscale modeling study of the interactions between aerosols and PBL meteorology during a haze episode in China Jing–Jin–Ji and its near surrounding region – Part 1: Aerosol distributions and meteorological features." Atmospheric Chemistry and Physics Discussions 14, no. 23 (2014): 31675–717. http://dx.doi.org/10.5194/acpd-14-31675-2014.

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Abstract. The urbanized region of Beijing–Tianjin–Hebei – often shortened to Jing–Jin–Ji and referred to as the 3JNS region in this paper – and its near surrounding region is becoming China's most polluted area by haze, exceeding even the Yangtze and Pearl river deltas. Aside from pollutant emission, the meteorology of the planetary boundary layer (PBL) is the most important factor affecting haze pollution. Focusing on July 2008, the aerosol optical properties and PBL meteorology features closely related with haze formation were simulated in 3JNS region using an online atmospheric chemical tra

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Wang, H., M. Xue, X. Y. Zhang, et al. "Mesoscale modeling study of the interactions between aerosols and PBL meteorology during a haze episode in Jing–Jin–Ji (China) and its nearby surrounding region – Part 1: Aerosol distributions and meteorological features." Atmospheric Chemistry and Physics 15, no. 6 (2015): 3257–75. http://dx.doi.org/10.5194/acp-15-3257-2015.

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Abstract. The urbanized region ofJing(Beijing)-Jin(Tianjin)-Ji (alias of Hebei province) and its nearby surrounding region (3JNS) is becoming China's most polluted area by haze, exceeding even the Yangtze and Pearl river deltas. Aside from pollutant emission, the meteorology of the planetary boundary layer (PBL) is the most important factor affecting haze pollution. Focusing on July 2008, the aerosol optical properties and PBL meteorology features closely related to haze formation were simulated in the 3JNS region using an online atmospheric chemical transport model. The relationship between r

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Weymar, Guilherme Jahnecke, Bardo Ernst Josef Bodmann, Daniela Buske, Jonas Da Costa Carvalho, and Marco Túllio Menna Barreto de Vilhena. "SOLUÇÃO ANALÍTICA PARA UM MODELO DE DISPERSÃO DE POLUENTES COM REAÇÃO FOTOQUÍMICA NA CAMADA LIMITE ATMOSFÉRICA." Ciência e Natura 38 (July 20, 2016): 177. http://dx.doi.org/10.5902/2179460x20155.

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This paper presents an analytical solution for three-dimensional advection-diffusion equation applied to the dispersion of reactive pollutants emitted into the Atmospheric Boundary Layer (PBL). Some substances when emitted in PBL suffer photochemical reactions, so a source term is included in the advection-diffusion equation to represent this reaction, turning the model more realistic. The pollutant concentration fields obtained by the proposed solution are compared with the mixing ratio data obtained by monitoring the air quality in the metropolitan region of Porto Alegre. With the analysis o

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Valdez Salas, Benjamin, Michael Schorr Wiener, Roumen Zlatev Koytchev, et al. "Copper Corrosion by Atmospheric Pollutants in the Electronics Industry." ISRN Corrosion 2013 (October 2, 2013): 1–7. http://dx.doi.org/10.1155/2013/846405.

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Hydrogen sulphide (H2S) is considered one of the most corrosive atmospheric pollutants. It is a weak, diprotic, reducing acid, readily soluble in water and dispersed into the air by winds when emitted from natural, industrial, and anthropogenic sources. It is a pollutant with a high level of toxicity impairing human health and the environment quality. It attacks copper forming thin films of metallic sulphides or dendrite whiskers, which are cathodic to the metal substrate, enhancing corrosion. H2S is actively involved in microbially influenced corrosion (MIC) which develops in water, involving

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Arcaro, Alex, Gianluigi Gorla, and Manuela Zublena. "What are the benefits of clean air for Alpine destinations?" Worldwide Hospitality and Tourism Themes 10, no. 2 (2018): 172–84. http://dx.doi.org/10.1108/whatt-12-2017-0084.

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Purpose In this paper, the authors assume that the matter of a good quality of air will grow in importance in the future, and that it could be a noticeable part of a quality system to be used for communication purposes. The authors propose some synthetic indicators for air quality and discuss them in-depth to provide robust indexes suitable for ranking a set of alpine destinations. Design/methodology/approach The authors use locally based data on three pollutants with reference to 25 alpine touristic destinations. Starting from hourly data for 62 days of the 2014 summer season for each polluta

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Rieder, W., and F. Delfanian. "Simulations of Airborne Pollutant Levels and Infiltration Flows in an Enclosure." Journal of Solar Energy Engineering 113, no. 4 (1991): 236–43. http://dx.doi.org/10.1115/1.2929968.

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A study of infiltration-type air flows through a room-size enclosure with an obstructing wall was conducted. A finite volume (cell finite difference) method was used, and a k-ε turbulence model was retained in the simulations. Detailed monitoring of how a simulated gaseous pollutant was diluted and dispersed over time was accomplished, and showed that nearly stagnant zones exist. The simple air change (ACH) method of rating the ventilation capabilities of an enclosure was judged to be marginally acceptable, with a local air age scheme a suggested alternative for multizone cases. Based on the s

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Yeats, George. "“Dirty Air”." Nineteenth-Century Literature 66, no. 3 (2011): 328–54. http://dx.doi.org/10.1525/ncl.2011.66.3.328.

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Abstract This essay argues that the literary atmosphere of Charles Dickens’s Little Dorrit (1855–57) reciprocates the condition of the mid-century London air, as Dickens understood it. Through exploring the novel’s connections with contemporary medical-political debates about air purity, I hope to show that the novel can be read as a study of atmospheric influence, in both material and moral terms. In particular, I examine the metaphorical and phenomenal roles of airborne pollutants in the narrative. Dickens repeatedly correlates socioeconomic with meteorological climates: toxic investment spr

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Tursi, Antonio, Francesco Chidichimo, Rita Bagetta, and Amerigo Beneduci. "BTX Removal from Open Aqueous Systems by Modified Cellulose Fibers and Evaluation of Competitive Evaporation Kinetics." Water 12, no. 11 (2020): 3154. http://dx.doi.org/10.3390/w12113154.

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BTX stands for Benzene, Toluene, and Xylenes, which are volatile organic compounds contained in petroleum products such as gasoline. They have negative health effects and are sadly known for soil, air, and water contamination. This paper provides an investigation on BTX removal from open water systems like those represented by natural water bodies. In such systems, the evaporation process takes place, stealing the pollutants from the aqueous matrix by transferring them into the air, resulting in a secondary pollution. To prevent this situation, adsorption of these organic compounds on cellulos

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Tiller, KG, LH Smith, RH Merry, and PM Clayton. "The dispersal of automotive lead from metropolitan Adelaide into adjacent rural areas." Soil Research 25, no. 2 (1987): 155. http://dx.doi.org/10.1071/sr9870155.

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About 600 surface samples and key horizons of 240 soil profiles from a 90 x 20 km study area extending from the metropolitan area of Adelaide, South Australia, to its rural hinterland, were analysed for lead. Atmospheric fallout was collected monthly at 19 locations for 2 years, and up to 3 years at fewer sites in the same area. Lead in atmospheric fallout showed little year-to-year variation and tended to be seasonally controlled with highest values in winter. Collection of lead in fallout was unaffected by the filtering action of vegetation. The lead content of surface soils and atmospheric

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Sudhakar, P., P. Kalavathi, D. Ramakrishna Rao, and M. Satyanarayna. "Design of Laser Based Monitoring Systems for Compliance Management of Odorous and Hazardous Air Pollutants in Selected Chemical Industrial Estates at Hyderabad, India." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-8 (December 23, 2014): 1467–70. http://dx.doi.org/10.5194/isprsarchives-xl-8-1467-2014.

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Industrialization can no longer sustain without internalization of the concerns of the receiving environment and land-use. Increased awareness and public pressure, coupled with regulatory instruments and bodies exert constant pressure on industries to control their emissions to a level acceptable to the receiving environment. However, when a group of industries come-up together as an industrial estate, the cumulative impacts of all the industries together often challenges the expected/desired quality of receiving environment, requiring stringent pollution control and monitoring measures. Laser

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Widawski, Artur. "The influence of atmospheric circulation on the air pollution concentration and temperature inversion in Sosnowiec. Case study." Environmental & Socio-economic Studies 3, no. 2 (2015): 30–40. http://dx.doi.org/10.1515/environ-2015-0060.

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AbstractSosnowiec is located in the Katowice Region, which is the most urbanized and industrialized region in Poland. Urban areas of such character favor enhancement of pollution concentration in the atmosphere and the consequent emergence of smog. Local meteorological and circulation conditions significantly influence not only on the air pollution level but also change air temperature considerably in their centers and immediate vicinities. The synoptic situation also plays the major role in dispersal and concentration of air pollutants and changes in temperature profile. One of the most impor

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Seimova, G. V., I. V. Stefanenko, and M. S. Kalashnikova. "Dust Dispersion Modeling of the Urban Environment Air nearby the Potash Production." Applied Mechanics and Materials 878 (February 2018): 263–68. http://dx.doi.org/10.4028/www.scientific.net/amm.878.263.

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Air pollution is one of the most significant problem and threats to human health worldwide. The most common pollutant is particulate matter (PM). For characteristics of the PM and their health effects, commonly used indicator is the mass concentration of particles with diameters less than 10 microns (PM10) and small dispersed suspended particles with diameter less than 2.5 microns (PM2.5), as such small particles are able to penetrate deep into the respiratory tract of the human body. The concentration of particles PM10 and PM2.5 in the air is subjected of rationing. This problem has been expl

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DARIMI, DARIMI, Ikhwan Siregar YUSNI, Anita SOFIA, FIRDAUS FIRDAUS, and SYAHRIL SYAHRIL. "Model of Motor Vehicle Gas Distribution Based on Ecology- Health, Economic, Social-Cultural and Law Factors in the City of Pekanbaru." Journal of Environmental Management and Tourism 9, no. 7 (2019): 1479. http://dx.doi.org/10.14505//jemt.v9.7(31).12.

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Air pollution will make the city environment unhealthy and can interfere with human health, therefore one must strive to not increase air pollution. One way to reduce air pollution in cities is to reduce carbon emissions and build Green Open Spaces (GOS). Therefore, the purpose of this study is to create a model for distribution of motor vehicle exhaust emissions in the city of Pekanbaru. Air pollution at a certain level can be a combination of one or more pollutants, either in the form of solids, liquids or incoming gases dispersed into the air and then spread to the surrounding environment.

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Lysova, Ekaterina, Oksana Paramonova, Natalia Samarskaya, Oksana Gyrova, and Irina Tsarevskaya. "Application of physical and energetic approach to estimation and selection of atmospheric protection systems for energetic devices." MATEC Web of Conferences 170 (2018): 04013. http://dx.doi.org/10.1051/matecconf/201817004013.

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The air basin of cities is subjected to considerable pollution, including waste gases generated during the production of thermal and electric energy by power plants. However, power plants are an indispensable element of the life support system on urban areas and they can not be taken out of the city, that means minimizing losses, both material and energy. Therefore, the problem of the correct choice of structural elements and operating characteristics of the process and a system for reducing air pollution is becoming very important. The paper analyzes the most well-known and practical scientif

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Vidal Daza, Oscar Andres, and Andrea Perez Vidal. "Estimación de la Dispersión de Contaminantes Atmosféricos Emitidos por una Industria Papelera Mediante el Modelo AERMOD." Ingeniería 23, no. 1 (2018): 31. http://dx.doi.org/10.14483/23448393.12262.

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Context: modeling of atmospheric pollutants is an useful tool for air quality monitoring and management. In this study the dispersion of three atmospheric pollutants (SO2, NO2 and Total Suspended Particles - TSP) emitted by a boiler from a paper factory at Valle del Cauca department was estimated and its potential impact on the population settlements located at 5Km around the stationary source was identified.Method: the study was structured in three stages: (i) compiling and processing of meteorological, topographic and isokinetic sampling data; (ii) modeling the dispersion of pollutants using

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Azarov, Valeriy N., Andrey A. Kuzmichev, Denis A. Nikolenko, Anatoliy N. Vasilev, and Elena Yu Kozlovtseva. "The research of dust dispersed composition of urban environment." Vestnik MGSU, no. 3 (March 2020): 432–42. http://dx.doi.org/10.22227/1997-0935.2020.3.432-442.

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Introduction. Presently, the atmosphere of urban environments needs protection due to excessive ambient air pollutant concentrations. Each year these concentrations go up, triggered by environmental factors and anthropogenic processes, such as industry, transport, housing and utilities infrastructure. Dust is one of the main ecological factors that have a negative impact on the air. The co-authors have analyzed theoretical regularities governing the fractional composition of dust in the urban atmosphere, field tested the air polluted by the atmospheric aerosol in urban areas, and studied the a

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Winardi. "The Effect of Temperature and Humidity Against Lead (Pb) Concentration in the Air of Pontianak City." JURNAL BORNEO AKCAYA 1, no. 1 (2014): 16–25. http://dx.doi.org/10.51266/borneoakcaya.v1i1.5.

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The existence of Lead (Pb) pollutants in the air that generated by motor vehicle exhaust emissions determined by how large the influence of temperature and humidity tend to change according to time and weather influences. Temperature and humidity Changes in the earth's surface due to solar radiation in the morning-afternoon-evening will give change in the concentration of Pb in the air. With the days variation will be seen the influence of weather that gives the difference in temperature and humidity of each day so that the concentration of Pb in air pollutants, will be varied. This research l

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Meng, Xianyong, Yiping Wu, Zhihua Pan, Hao Wang, Gang Yin, and Honggang Zhao. "Seasonal Characteristics and Particle-size Distributions of Particulate Air Pollutants in Urumqi." International Journal of Environmental Research and Public Health 16, no. 3 (2019): 396. http://dx.doi.org/10.3390/ijerph16030396.

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Urban particulate air pollution is a known cause of adverse human health effects worldwide. Urumqi is a large oasis city in which rapid urbanization has caused a series of eco-environmental problems including serious air pollution, water shortage, dense population, excess energy consumption, and the creation of an urban heat island, among others. Coal is the most important source of energy and air pollutants that are poorly dispersed into the natural surroundings are the main reasons for serious pollution in the Urumqi urban area. Using differential optical absorption spectroscopy (DOAS), aero

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Pimentel, David. "Insect population responses to environmental stress and pollutants." Environmental Reviews 2, no. 1 (1994): 1–15. http://dx.doi.org/10.1139/a94-001.

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Insects and other related arthropods make up about 90% of all plant and animal species in the world. They are vital to the functioning of the ecosystem and biosphere, and neither of these systems can operate effectively without insect interactions. Because of their major ecological and economic roles in nature and society, the beneficial and pest activities of insects need to be clearly understood. Insect populations are being stressed directly by the action of temperature, moisture, and a wide array of chemical Ö öpollutants (pesticides, fertilizers, air pollutants, and numerous other chemica

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Chmielewski, Maciej, Marian Gieras, and Paweł Niszczota. "Fuel-Water emulsion impact on miniature gas turbine pollutant emission." E3S Web of Conferences 137 (2019): 01046. http://dx.doi.org/10.1051/e3sconf/201913701046.

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The innovative use of the Fuel-Water emulsion in a small gas turbine for distributed energy generation is proposed. The FWE in this situation is considered as a nonhomogeneous mix of water and fuel, where water is a dispersed phase in the continuous fuel phase with an addition of surfactants. The Fuel-Water emulsion has a great mainly due to two mechanisms: temperature reduction due to heat absorption by the water phase and enhanced homogeneity of the fuel-air mixture due to micro-explosion of the superheated water phase inside the emulsion droplet. Proposed paper presents theoretical backgrou

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Bernardini, Francesco, Luigi Attademo, Riccardo Trezzi, et al. "T125. AN ASSOCIATION BETWEEN OZONE, BUT NOT OTHER AIR POLLUTANTS, AND DAILY NUMBER OF VISITS TO PSYCHIATRIC EMERGENCY SERVICES." Schizophrenia Bulletin 46, Supplement_1 (2020): S277—S278. http://dx.doi.org/10.1093/schbul/sbaa029.685.

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Abstract Background Air pollution is a major environmental risk to health. Exposure to xenobiotic heavy metals such as lead and cadmium—constituents of air pollution such as particulate matter and nitrogen and sulfur oxides, organic solvents, and other environmental pollutants—could be component causes for schizophrenia and other psychotic disorders. Long-term exposure to ambient air pollution could be an independent risk factor for mental health disorders. Recent studies analysing the association between daily levels of air pollutants and hospital admissions for mental disorders showed signif

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Herbst, L., and H. Rautenbach. "Climate change impacts on mean wind speeds in South Africa." Clean Air Journal 25, no. 2 (2015): 17. http://dx.doi.org/10.17159/2410-972x/2015/v25n2a2.

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Climate change could potentially affect a number of variables that impact the dispersal of and human exposure to air pollutants, as well as climate dependent sectors such as wind energy. This study attempted to quantify the projected changes in seasonal daily mean wind speeds for South Africa around the mid-21st century (2051-2075) under two different atmospheric heat pathways. Seasonal daily mean wind speed increases rarely reach 6% and decreases occur to a maximum of 3% and are variable between different seasons and areas within the country. In all seasons except December-January-February, w

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Cichowicz, Robert, and Maciej Dobrzański. "Spatial Analysis (Measurements at Heights of 10 m and 20 m above Ground Level) of the Concentrations of Particulate Matter (PM10, PM2.5, and PM1.0) and Gaseous Pollutants (H2S) on the University Campus: A Case Study." Atmosphere 12, no. 1 (2021): 62. http://dx.doi.org/10.3390/atmos12010062.

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Spatial analysis of the distribution of particulate matter PM10, PM2.5, PM1.0, and hydrogen sulfide (H2S) gas pollution was performed in the area around a university library building. The reasons for the subject matter were reports related to the perceptible odor characteristic of hydrogen sulfide and a general poor assessment of air quality by employees and students. Due to the area of analysis, it was decided to perform measurements at two heights, 10 m and 20 m above ground level, using measuring equipment attached to a DJI Matrice 600 unmanned aerial vehicle (UAV). The aim of the measureme

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Huang, Haibao, Huiling Huang, Peng Hu, Xinguo Ye, and Dennis Y. C. Leung. "Removal of Formaldehyde Using Highly Active Pt/TiO2Catalysts without Irradiation." International Journal of Photoenergy 2013 (2013): 1–6. http://dx.doi.org/10.1155/2013/350570.

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Formaldehyde (HCHO) is one of the major indoor air pollutants. TiO2supported Pt catalysts were prepared by sol-gel method and used to eliminate HCHO at room temperature without irradiation. The reduced Pt/TiO2catalyst (denoted as Pt/TiO2-H2) showed much higher activity than that calcined in air (denoted as Pt/TiO2-air). More than 96% of the conversion of HCHO was obtained over 0.5 wt% Pt/TiO2-H2, on which highly dispersed metallic Pt nanoparticles with very small size (~2 nm) were identified. Metallic Pt rather than cationic Pt nanoparticles provide the active sites for HCHO oxidation. Negativ

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Manzhilevskaya, Svetlana, Alexei Lihonosov, and Lubov Petrenko. "Fine dust atmospheric pollution from the objects of infill construction." E3S Web of Conferences 135 (2019): 01020. http://dx.doi.org/10.1051/e3sconf/201913501020.

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Air pollution emissions are released from both natural and anthropogenic sources. During the environment pollution researching and monitoring the special attention should be paid to the construction operations, since during the construction processes many pollutants are released, especially fine dust particles, which are harmful to the health of construction workers and the population living near the construction site. The construction of any object in urban terrain has bad influence not only on the nearby buildings and city infrastructure, but on the existing environment of urban areas. The i

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Sikarwar, Ankit, and Ritu Rani. "Assessing the Immediate Effect of Covid-19 Lockdown on Air Quality: A Case Study of Delhi, India." Journal of Environmental Geography 13, no. 3-4 (2020): 27–33. http://dx.doi.org/10.2478/jengeo-2020-0009.

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Abstract In India, a nationwide lockdown due to COVID-19 has been implemented on 25 March 2020. The lockdown restrictions on more than 1.3 billion people have brought exceptional changes in the air quality all over the country. This study aims to analyze the levels of three major pollutants: particulate matter sized 2.5 μm (PM2.5) and 10 μm (PM10), and nitrogen dioxide (NO2) before and during the lockdown in Delhi, one of the world’s most polluted cities. The data for PM2.5, PM10, and NO2 concentrations are derived from 38 ground stations dispersed within the city. The spatial interpolation ma

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Farrukh, Minaal, and Haneen Khreis. "Monetizing the Burden of Childhood Asthma Due to Traffic Related Air Pollution in the Contiguous United States in 2010." International Journal of Environmental Research and Public Health 18, no. 15 (2021): 7864. http://dx.doi.org/10.3390/ijerph18157864.

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Background: Traffic-related air pollution (TRAP) refers to the wide range of air pollutants emitted by traffic that are dispersed into the ambient air. Emerging evidence shows that TRAP can increase asthma incidence in children. Living with asthma can carry a huge financial burden for individuals and families due to direct and indirect medical expenses, which can include costs of hospitalization, medical visits, medication, missed school days, and loss of wages from missed workdays for caregivers. Objective: The objective of this paper is to estimate the economic impact of childhood asthma inc

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Stukaitė, Laura, Ina Tetsman, and Vladas Vekteris. "RESEARCH INTO THE INFLUENCE OF THE ACOUSTIC FIELD ON THE EFFICIENCY OF REMOVING AEROSOLS / AKUSTINIO LAUKO ĮTAKOS AEROZOLIO ŠALINIMO EFEKTYVUMUI TYRIMAS." Mokslas - Lietuvos ateitis 6, no. 4 (2013): 537–40. http://dx.doi.org/10.3846/mla.2012.87.

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The paper presents the methods for reducing harmful aerosols from galvanic baths polluting the environment under conditions when air flow helps in forming an acoustic field above the bath. The findings show that the level of air humidy is the lowest when aerosols are removed with the help of a side exhauster. Side effects on acoustic coagulation may occur. Aerosol coagulates when elevated above the liquid and returns to liquid not dispersed in the evironment. The article introduces active suckers in accordance to their form and effectiveness collecting pollutants. The dependence of humidity on

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Glinyanova, Irina. "Small-dispersed dust chemical composition on the leaves of apricot trees (Prunus armeniaca) in residential area." E3S Web of Conferences 138 (2019): 01021. http://dx.doi.org/10.1051/e3sconf/201913801021.

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A study of the small-dispersed dust chemical composition on the leaves of apricot trees (Prunus armeniaca) in the residential area of the Sredneakhtubinsky district of the Volgograd region was coducted. The aim of the study was to assess the environmental situation in low-rise buildings near functioning constructional and machinery enterprises. The leaves of apricot trees (Prunus armeniaca), growing in the residential area, were used as passive biomonitors. Chemical analysis of dust particles was carried out with the usage of a scanning electron microscope Versa 3D Dual Beam. As a result of th

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Гаджиєв Едуард Назімович. "ДОСЛІДЖЕННЯ ДИСПЕРСНОГО СКЛАДУ ПИЛУ ПРИ ВИРОБНИЦТВІ ТЕПЛОІЗОЛЯЦІЙНИХ МАТЕРІАЛІВ". World Science 1, № 2(42) (2019): 18–23. http://dx.doi.org/10.31435/rsglobal_ws/28022019/6348.

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   The problem of air pollution with environmentally hazardous dust with a particle size of up to 10 microns at plants for the production of thermal insulation materials is considered. The purpose of this work is to study the dispersed composition of dust in the production of insulation materials (such as mineral wool), and to determine the effectiveness of the existing gas cleaning equipment, which traps pollutants. The dispersed composition of the dust generated at the plant for the production of thermal insulation materials, and the dispersed composition of the dust collec

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Zouboulis, Anastasios I., and Konstantine A. Matis. "Removal of cadmium from dilute solutions by flotation." Water Science and Technology 31, no. 3-4 (1995): 315–26. http://dx.doi.org/10.2166/wst.1995.0540.

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Cadmium constitutes a priority pollutant existing in waste streams from metal plating and various other industries. The removal of this toxic metal employing the dissolved air flotation technique was investigated in laboratory batch experiments; the mechanism of precipitate flotation as the respective hydroxide was followed. Main examined parameters include: recycle ratio, pH of the solution, concentrations of added surfactant (sodium dodecyl sulphate), frother (ethanol) and cadmium. Promising results have been obtained, at the pH range between 10 and 11 approximately, showing the significance

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Wawer, Małgorzata, Marzena Rachwał, and Joanna Kowalska. "Impact of noise barriers on the dispersal of solid pollutants from car emissions and their deposition in soil." Soil Science Annual 68, no. 1 (2017): 19–26. http://dx.doi.org/10.1515/ssa-2017-0003.

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Abstract Despite the existence of various methods aimed at protecting the environment from the negative influence of roads, there is a lack of adequate techniques for monitoring and reducing the spread of roadside pollution into the air and soils. The aim of this study was to assess the impact of noise barriers (sound walls) on the dispersal and soil deposition of solid pollutants from car emissions, based on both quantitative and qualitative analysis. Magnetic susceptibility measurements, trace elements analyses, and platinum (Pt) and rhodium (Rh) content determinations were performed on soil

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Jeon, Byunggwon, James V. Cizdziel, J. Stephen Brewer, et al. "Gaseous Elemental Mercury Concentrations along the Northern Gulf of Mexico Using Passive Air Sampling, with a Comparison to Active Sampling." Atmosphere 11, no. 10 (2020): 1034. http://dx.doi.org/10.3390/atmos11101034.

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Mercury is a toxic element that is dispersed globally through the atmosphere. Accurately measuring airborne mercury concentrations aids understanding of the pollutant’s sources, distribution, cycling, and trends. We deployed MerPAS® passive air samplers (PAS) for ~4 weeks during each season, from spring 2019 to winter 2020, to determine gaseous elemental mercury (GEM) levels at six locations along the northern Gulf of Mexico, where the pollutant is of particular concern due to high mercury wet deposition rates and high concentrations in local seafood. The objective was to (1) evaluate spatial

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Ashworth, Kirsti, Silvia Bucci, Peter J. Gallimore, et al. "Megacity and local contributions to regional air pollution: an aircraft case study over London." Atmospheric Chemistry and Physics 20, no. 12 (2020): 7193–216. http://dx.doi.org/10.5194/acp-20-7193-2020.

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Abstract. In July 2017 three research flights circumnavigating the megacity of London were conducted as a part of the STANCO training school for students and early career researchers organised by EUFAR (European Facility for Airborne Research). Measurements were made from the UK's Facility for Airborne Atmospheric Measurements (FAAM) BAe-146-301 atmospheric research aircraft with the aim to sample, characterise and quantify the impact of megacity outflow pollution on air quality in the surrounding region. Conditions were extremely favourable for airborne measurements, and all three flights wer

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Duarte, Nicolás, Sebastián Roa, and Francy Méndez-C. "Microbiological Air Quality in an Optical Clinic." Ciencia y Tecnología para la Salud Visual y Ocular 17, no. 1 (2019): 19–28. http://dx.doi.org/10.19052/sv.vol17.iss1.2.

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Introduction: Air as a fluid is present in different spaces. It is likely to contain different pollutants, including pathogenic microorganisms, which, due to environmental factors, are dispersed in the hospital environment, where they are responsible for causing diseases in vulnerable populations. In addition to being considered a risk to health, nosocomial diseases generate very high treatment costs, ranging from 13 to 15 million pesos per illness during treatment. Objective: To determine the microbiological quality of the air in bathrooms, corridors, reception and storage of one optical clin

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Górka, Maciej, Wojciech Bartz, Alisa Skuridina, and Anna Potysz. "Populus nigra Italica Leaves as a Valuable Tool for Mineralogical and Geochemical Interpretation of Inorganic Atmospheric Aerosols’ Genesis." Atmosphere 11, no. 10 (2020): 1126. http://dx.doi.org/10.3390/atmos11101126.

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The Olmaliq industrial area in Uzbekistan is believed to represent a risk to the environment and to human health due to the dispersal of contaminants into the air and soil. This study was undertaken to delineate the track of airborne contaminants’ migration and to assess the distribution of such particles deposited on Populus nigra L. cv Italica leaves and soils. Particles were identified using scanning electron microscopy–energy-dispersive X-ray spectroscopy (SEM-EDX), while bulk soil composition was quantified by applying inductively coupled plasma mass spectrometry (ICP-MS). The results of

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Baltensperger, Urs. "Spiers Memorial Lecture : Introductory lecture: chemistry in the urban atmosphere." Faraday Discussions 189 (2016): 9–29. http://dx.doi.org/10.1039/c6fd00065g.

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The urban atmosphere is characterised by a multitude of complex processes. Gaseous and particulate components are continuously emitted into the atmosphere from many different sources. These components are then dispersed in the urban atmosphereviaturbulent mixing. Numerous chemical reactions modify the gas phase chemistry on multiple time scales, producing secondary pollutants. Through partitioning, the chemical and physical properties of the aerosol particles are also constantly changing as a consequence of dispersion and gas phase chemistry. This review presents an overview of the involved pr

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Поляков, С. В., Ю. Н. Карамзин, Т. А. Кудряшова, В. О. Подрыга, Д. В. Пузырьков, and Н. И. Тарасов. "Multiscale supercomputer modeling of gas purification processes by the adsorption method." Numerical Methods and Programming (Vychislitel'nye Metody i Programmirovanie), no. 1 (January 13, 2020): 64–77. http://dx.doi.org/10.26089/nummet.v21r106.

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Рассматривается проблема суперкомпьютерного моделирования процессов очистки воздушной среды от мелкодисперсных твердых загрязняющих примесей, кластеризованных в виде наночастиц. Моделируемый способ очистки предполагает применение нанофильтров и сорбентов. Оба способа очистки часто комбинируются в современных очистных системах. Способ очистки с помощью нанофильтров позволяет получить высокое качество, но является дорогостоящим вследствие необходимости частой замены фильтрующих элементов (мембран). Способ очистки с помощью сорбентов оказывается несколько хуже по качеству, однако позволяет провод

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Liu, Bing, Ai Min Li, Ming Fang Xia, and Zhao Lian Zhu. "Preparation of Manganese Oxide Supported on Activated Carbon and its Application in Catalytic Ozonation of 4-Chlorophenol." Advanced Materials Research 538-541 (June 2012): 2285–88. http://dx.doi.org/10.4028/www.scientific.net/amr.538-541.2285.

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Catalyst with manganese oxide highly dispersed on granular activated carbon (MnOx/GAC) was fabricated by impregnating GAC in MnCl2 solution and characterized by several techniques. The performance of manganese catalyst was investigated in catalytic ozonation of 4-chlorophenol in water. Manganese catalyst exhibits better efficiency than the original granular activated carbon, due to the synergic effect between activated carbon and manganese oxide. MnOx/GAC, produced by a simple methodin situ, is promising in catalytic ozonation of refractory organic pollutants in waste water.

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Glinyanova, Irina, Valery Azarov, and Valery Fomichev. "PHYTOMONITORING AS A METOD OF THE ASSESSMENT OF ATMOSPHERIC AIR POLLUTION BY URBAN ENVIRONMENT BY FINE DUST." Биосферная совместимость: человек, регион, технологии, no. 1(25) (April 1, 2019): 42–53. http://dx.doi.org/10.21869/23-11-1518-2019-25-1-42-53.

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Fine dust: (PM2.5, PM10) is a priority pollutant that contributes to the development of numerous dis-eases in urban areas. The purpose of this scientific work is to study the dispersed composition of dust parti-cles on the leaves of apricot trees (Prúnus armeníaca) in the residential zone of Volgograd. The novelty of the work lies in the study of the dispersed composition of dust particles on the leaves of apricot trees (Prúnus armeníaca) in the residential zone in the city of Volgograd near the construction industry enterprise, me-chanical engineering, leather production and railway transport

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Tolis, Evangelos, Evangelos Gkanas, Eleni Pavlidou, et al. "Microstuctural analysis and determination of PM10 emission sources in an industrial Mediterranean city." Open Chemistry 12, no. 10 (2014): 1081–90. http://dx.doi.org/10.2478/s11532-014-0549-8.

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AbstractScientists are interested in knowing more about the control of sources which contribute to environmental pollution. Air pollution has two main sources: anthropogenic and natural sources. The natural contributions to environmental pollution can be assessed, but cannot be totally controlled. while the emissions from the anthropogenic sources can be controlled. These air pollutants can be dispersed and transferred by winds in the atmosphere. The focus area of this study is the Mediterranean basin. The most important winds in this area are the land and sea breezes. Scanning Electron Micros

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Srinivas, B., A. Kumar, M. M. Sarin, and A. K. Sudheer. "Impact of continental outflow on chemistry of atmospheric aerosols over tropical Bay of Bengal." Atmospheric Chemistry and Physics Discussions 11, no. 7 (2011): 20667–711. http://dx.doi.org/10.5194/acpd-11-20667-2011.

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Abstract. The continental outflow from Indo-Gangetic Plain and south-east Asia dominates the widespread dispersal of pollutants over tropical Bay of Bengal (BoB) during the late NE-monsoon (January–March). It is thus pertinent to assess the impact on marine atmospheric boundary layer of BoB. The chemical data, based on analyses of size-segregated (PM2.5 and PM10) aerosols, suggest the dominance of nss-SO42− (range: 1.3 to 28 μg m−3) in PM2.5. Almost all SO42− is of anthropogenic origin and accounts for as much as 65 % of the water-soluble inorganic constituents. The impact of anthropogenic sou

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Marulanda Tobón, Alejandro, Ignacio José Moncho-Esteve, Jordi Martínez-Corral, and Guillermo Palau-Salvador. "Dispersion of CO Using Computational Fluid Dynamics in a Real Urban Canyon in the City Center of Valencia (Spain)." Atmosphere 11, no. 7 (2020): 693. http://dx.doi.org/10.3390/atmos11070693.

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One of the main environmental problems we are currently facing is air pollution. Air quality models calculate how much pollution is emitted and dispersed into the atmosphere. This research presents a Computational Fluid Dynamic model using a real urban geometry for the analysis of CO contamination with a three-dimensional model. This method includes a procedure of calculating emissions using different types of vehicles. CO Measurements are obtained from a Wireless Sensor Network to validate the models. The present study analyzes six representative real cases of different traffic situations and

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