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Journal articles on the topic 'Parity dependence of pollutant concentrations'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

N., Bravo, Hansen S., Økland I., et al. "Influence of maternal and sociodemographic characteristics on the accumulation of organohalogen compounds in Argentinian women. The EMASAR study." Environmental Research 158 (October 1, 2017): 759–67. https://doi.org/10.1016/j.envres.2017.07.033.

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The occurrence of organohalogen compounds in venous serum from post-partum mothers from two Argentinian cities, Salta and Ushuaia, has been investigated (n = 698). 4,4'-DDE was the most abundant compound in these cities, with geometric means of 33 and 67ng/g lipid weight, respectively. City of residence, age and parity were the main determinants of the accumulation of these compounds. Hexachlorobenzene (HCB) was the second most abundant pollutant in Ushuaia, 8.7ng/g lipid, and β-hexachlorocyclohexane (β-HCH) in Salta, 7.8ng/g lipid. Decabromodiphenyl ether was higher in Ushuaia than Salta, 8.2

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Kozlova, Anastasia, Marina Stepantsevich, Vladislav Kukartsev, Aleksey Losev, and Natalya Yagudaeva. "Statistical analysis of seasonal variations in pollutant concentrations in urban atmosphere." E3S Web of Conferences 592 (2024): 06010. http://dx.doi.org/10.1051/e3sconf/202459206010.

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In the context of global climate change and urbanization, the issue of air quality is becoming increasingly relevant. Air pollution poses a threat to human health and ecosystems, highlighting the need for monitoring the concentrations of pollutants. This study examines the seasonal variations in the concentrations of harmful substances in the urban atmosphere using statistical methods. The aim of the research is to analyze time series data on concentrations of carbon monoxide (CO), nitrogen oxide (NO), nitrogen dioxide (NO2), sulfur dioxide (SO2), ozone (O3), ammonia (NH3), and particulate mat

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Chan, Edward C., and Timothy M. Butler. "urbanChemFoam 1.0: large-eddy simulation of non-stationary chemical transport of traffic emissions in an idealized street canyon." Geoscientific Model Development 14, no. 7 (2021): 4555–72. http://dx.doi.org/10.5194/gmd-14-4555-2021.

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Abstract. This paper describes a large-eddy simulation based chemical transport model, developed under the OpenFOAM framework, implemented to simulate dispersion and chemical transformation of nitrogen oxides from traffic sources in an idealized street canyon. The dynamics of the model, in terms of mean velocity and turbulent fluctuation, are evaluated using available stationary measurements. A transient model run using a photostationary reaction mechanism for nitrogen oxides and ozone subsequently follows, where non-stationary conditions for meteorology, background concentrations, and traffic

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N., Bravo, Grimalt J.O., Chashchin M., Chashchin V.P., and Odland J.Ø. "Drivers of maternal accumulation of organohalogen pollutants in Arctic areas (Chukotka, Russia) and 4,4'-DDT effects on the newly born." Environment International 124 (January 26, 2019): 541–52. https://doi.org/10.17632/j69gbpgth5.1.

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BACKGROUND: One of the most worrying consequence of the production and use of persistent organohalogen pollutants (POPs) is the high accumulation in Arctic populations because of long-range transport. Study of the effects in these populations may illustrate human impacts that are difficult to assess in other locations with lower exposure to these compounds and more diverse pollutant influences. OBJECTIVE: We aimed to identify the main maternal characteristics influencing on the accumulation of these compounds and the effects on the newborns in a highly exposed Arctic population (Chukotka, Russ

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Girgždienė, Raselė, and Radvilė Rameikytė. "VARIATION OF PM10 MASS AND AEROSOL NUMBER CONCENTRATIONS IN ŠIAULIAI." JOURNAL OF ENVIRONMENTAL ENGINEERING AND LANDSCAPE MANAGEMENT 15, no. 1 (2007): 47–53. http://dx.doi.org/10.3846/16486897.2007.9636907.

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The urban environment is distinguished by higher aerosol and gaseous pollutant concentrations than those in rural areas. A study of aerosol pollutant behavior was performed in an industrial Lithuanian city of Šiauliai. The PM10 mass concentration and meteorological parameter monitoring data were analysed. The aerosol number concentration was measured during a 10‐day experiment in Šiauliai. Analysis of PM10 showed that the workdays‐weekends phenomenon in the PM10 mass concentration distribution was prevailing. The PM10 mass concentration on workdays was higher in comparison with the concentrati

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Khuriganova, Olga I., Vladimir A. Obolkin, Liudmila P. Golobokova, Yuri S. Bukin, and Tamara V. Khodzher. "Passive Sampling as a Low-Cost Method for Monitoring Air Pollutants in the Baikal Region (Eastern Siberia)." Atmosphere 10, no. 8 (2019): 470. http://dx.doi.org/10.3390/atmos10080470.

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The measured concentrations of inorganic pollutants, such as ozone (2015–2018), sulfur, and nitrogen oxides (2012–2018) at air monitoring sites in the south of Eastern Siberia were sampled, following the passive sampling method, and analyzed. The spatial inhomogeneity of atmospheric gas concentrations is presented. The ozone concentration is lower in urban areas than those in rural areas and the background level. However, the nitrogen and sulfur oxide concentrations are higher in the atmosphere over the city site. The seasonal dependence of the ozone concentration was determined using its maxi

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Li, Dong, Jiping Liu, and Yangyang Zhao. "Prediction of Multi-Site PM2.5 Concentrations in Beijing Using CNN-Bi LSTM with CBAM." Atmosphere 13, no. 10 (2022): 1719. http://dx.doi.org/10.3390/atmos13101719.

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Air pollution is a growing problem and poses a challenge to people’s healthy lives. Accurate prediction of air pollutant concentrations is considered the key to air pollution warning and management. In this paper, a novel PM2.5 concentration prediction model, CBAM-CNN-Bi LSTM, is constructed by deep learning techniques based on the principles related to spatial big data. This model consists of the convolutional block attention module (CBAM), the convolutional neural network (CNN), and the bi-directional long short-term memory neural network (Bi LSTM). CBAM is applied to the extraction of featu

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Aguirre-López, Mario A., Miguel Angel Rodríguez-González, Roberto Soto-Villalobos, et al. "Statistical Analysis of PM10 Concentration in the Monterrey Metropolitan Area, Mexico (2010–2018)." Atmosphere 13, no. 2 (2022): 297. http://dx.doi.org/10.3390/atmos13020297.

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Air-quality monitoring and analysis are initial parts of a comprehensive strategy to prevent air pollution in cities. In such a context, statistical tools play an important role in determining the time-series trends, locating areas with high pollutant concentrations, and building predictive models. In this work, we analyzed the spatio-temporal behavior of the pollutant PM10 in the Monterrey Metropolitan Area (MMA), Mexico during the period 2010–2018 by applying statistical analysis to the time series of seven environmental stations. First, we used experimental variograms and scientific visuali

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Xu, W. Y., C. S. Zhao, L. Ran, et al. "Characteristics of pollutants and their correlation to meteorological conditions at a suburban site in the North China Plain." Atmospheric Chemistry and Physics Discussions 11, no. 3 (2011): 7113–54. http://dx.doi.org/10.5194/acpd-11-7113-2011.

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Abstract. North China Plain (NCP) is one of the most densely populated regions in China and has experienced enormous economic growth in the past decades. Its regional trace gas pollution has also become one of the top environmental concerns in China. Measurements of surface trace gases, including O3, NOx, SO2 and CO were carried out within the HaChi (Haze in China) project at Wuqing Meteorology Station, located between 2 mega-cities (Beijing and Tianjin) in the NCP, from 9 July 2009 to 21 January 2010. Detailed statistical analyses were made in order to provide information on the levels of the

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Xu, W. Y., C. S. Zhao, L. Ran, et al. "Characteristics of pollutants and their correlation to meteorological conditions at a suburban site in the North China Plain." Atmospheric Chemistry and Physics 11, no. 9 (2011): 4353–69. http://dx.doi.org/10.5194/acp-11-4353-2011.

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Abstract. North China Plain (NCP) is one of the most densely populated regions in China and has experienced enormous economic growth in the past decades. Its regional trace gas pollution has also become one of the top environmental concerns in China. Measurements of surface trace gases, including O3, NOx, SO2 and CO were carried out within the HaChi (Haze in China) project at Wuqing Meteorology Station, located between 2 mega-cities (Beijing and Tianjin) in the NCP, from 9 July 2009 to 21 January 2010. Detailed statistical analyses were made in order to provide information on the levels of the

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Roman, Ponomarenko, Plyatsuk Leonid, Hurets Larysa, et al. "DETERMINING THE EFFECT OF ANTHROPOGENIC LOADING ON THE ENVIRONMENTAL STATE OF A SURFACE SOURCE OF WATER SUPPLY." Eastern-European Journal of Enterprise Technologies 3, no. 10 (105) (2020): 54–62. https://doi.org/10.15587/1729-4061.2020.206125.

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Based on an analysis of forecasting models of the state of surface objects, this paper has proven that it is advisable, when forming a system of operational prediction and evaluation of anthropogenic loads, to apply simpler models that make it possible to promptly conduct calculations. As an approach to the operative forecasting of anthropogenic loading, the application of an approximately necessary level of the reduction of harmful influence on the site of a surface water object in terms of pollutants received has been suggested. Based on a retrospective analysis of data, the mathematical mod

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Simeunović, Milja, Radoslav Kojić, Nebojša Ralević, Pavle Pitka, and Tatjana Kovačević. "Influence of Traffic Flow and Meteorological Conditions on Air Pollution – A Case Study." Promet - Traffic&Transportation 35, no. 6 (2023): 932–46. http://dx.doi.org/10.7307/ptt.v35i6.387.

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In this paper, the influence of traffic flow volume and meteorological conditions on carbon monoxide (CO), particulate matter (PM), ozone (O3) and sulphur dioxide (SO2) concertation is determined based on the measurements conducted at a selected location over a 784-hour period. Multivariate Analysis of Variance (MANOVA) and Analysis of Variance (ANOVA) were applied to the data set. Regression analysis was also used to determine trends in pollutant concentrations as a function of traffic flow and meteorological parameters. Analysis of the obtained data indicates a statistically significant rela

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E., Junqué, Garí M., Llull R.M., and Grimalt J.O. "Drivers of the accumulation of mercury and organochlorine pollutants in Mediterranean lean fish and dietary significance." Science of the total Environment 634 (April 24, 2018): 170–80. https://doi.org/10.5281/zenodo.1227710.

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An integrated assessment of lean fish of commercial value as Hg and organochlorine compound source into the population of the Balearic Islands were reported. Dependences between pollutant concentrations, trophic level, fish species, specimen weight and physical-chemical properties were evaluated. Hg and total DDTs showed highest variability between fish species whereas PCBs and HCB displayed more constant median values. The organochlorine compounds found in highest concentrations were those with highest hydrophobicity, consistently with their higher bioaccumulation potential. These pollutant c

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Маюрова, А. С., та М. А. Кустикова. "Исследование влияния паводков и некоторых биотических факторов на распространение моллюсков семейства Bithyniidae". Biosfera 11, № 1 (2019): 5. http://dx.doi.org/10.24855/biosfera.v11i1.472.

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The dependence of population density of Bithyniidae snails, which are the first intermediate hosts of Opisthorchis felineus (cat fluke), on maximum flood levels, pollutant concentrations, and the presence of leeches was investigated in water basins of the Khanty-Mansi Autonomous Area. Study sites were at the rivers Ob (Surgut environ), Irtysh (Khanty-Mansiysk environ) and Bolshoy Yugan (Ugut village). The prevalence of the mollusk was shown to correlate positively with flood levels and negatively with water pollution and the presence of leeches that feed on snails. These observations may be us

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Chan, Edward C., Ilona J. Jäkel, Basit Khan, et al. "An enhanced emission module for the PALM model system 23.10 with application for PM₁₀ emission from urban domestic heating." Geoscientific Model Development 18, no. 4 (2025): 1119–39. https://doi.org/10.5194/gmd-18-1119-2025.

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Abstract. This article presents an enhanced emission module for the PALM model system, which collects discrete emission sources from different emission sectors and assigns them dynamically to the prognostic equations for specific pollutant species as volumetric source terms. Bidirectional lookups between each source location and cell index are maintained by using a hash key approach, while allowing all emission source modules to be conceived, developed, and operated in a homogeneous and mutually independent manner. An additional generic emission mode has also been implemented to allow for the

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Efimova, Natalia V., Marina V. Kuzmina, and Elena V. Bobkova. "Assessment of the annual trend of chemical aerogenic risk to health and mortality of the population at an industrial center." Hygiene and sanitation 102, no. 12 (2023): 1375–80. http://dx.doi.org/10.47470/0016-9900-2023-102-12-1375-1380.

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Introduction. Ambient air pollution determines high levels of risk to public health, causing excess mortality.  The purpose of the study is to analyze the dependence of the seasonal dynamics of pollutants and mortality from major non-infectious diseases in the population of the industrial center of Eastern Siberia. Materials and methods. Air pollution in Bratsk was assessed based on data from monitoring systems for 2017–2022, taking into account one-time, average monthly and annual concentrations. Hazard indices and mortality rates (MR) from major causes were calculated. The annual

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Terekhov, Aleksandr, Federico Huaman de los Eros, Fayruza Ziganshina, Svetlana Mavlyutova, Ilya Bespalov, and Aydar Galimov. "Mathematical support for solving the direct problem of chemical kinetics to clarify the main patterns of pollutant emissions." E3S Web of Conferences 627 (2025): 02005. https://doi.org/10.1051/e3sconf/202562702005.

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Determination of kinetic parameters and obtaining the dependence of concentrations of substances on time is the main stage in the construction of a kinetic model. The mathematically constructed model is presented in the form of systems of differential equations. At this stage, they usually deal with two types of tasks, which are called forward and reverse. This paper presents algorithms for solving an arbitrary direct problem of chemical kinetics. As a method for solving systems of differential equations, the Rosenbrock type method is considered. The advantage of this work is to describe the s

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Cardei, Petru, Florin Nenciu, Nicoleta Ungureanu, et al. "Using Statistical Modeling for Assessing Lettuce Crops Contaminated with Zn, Correlating Plants Growth Characteristics with the Soil Contamination Levels." Applied Sciences 11, no. 17 (2021): 8261. http://dx.doi.org/10.3390/app11178261.

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The aim of the study was to identify new mathematical models and strategies that can characterize the behavior of pollutants accumulating in the soil over time, considering the special characteristics of these chemicals that cannot be degraded or destroyed easily. The paper proposes a statistical model for assessing the accumulation of Zn in the lettuce (Lactuca sativa L.), based on three indicators that characterize the development of lettuce plants over time. The experimental data can be used to obtain interpolated variations of the mass increase functions and to determine several functions

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Chubarova, Natalia E., Elizaveta E. Androsova, Alexandr A. Kirsanov, et al. "Aerosol and Its Radiative Effects during the Aeroradcity 2018 Moscow Experiment." GEOGRAPHY, ENVIRONMENT, SUSTAINABILITY 12, no. 4 (2019): 114–31. http://dx.doi.org/10.24057/2071-9388-2019-72.

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During the AeroRadCity-2018 spring aerosol experiment at the Moscow State University Meteorological Observatory the aerosol properties of the atmosphere and radiative aerosol effects were analyzed using a wide complex of measurements and model COSMO-ART simulations over Moscow domain. The program of measurements consisted of columnar aerosol AERONET retrievals, surface PM10, black carbon (BC) and aerosol gas precursors mass concentrations, as well as radiative measurements under various meteorological conditions. We obtained a positive statistically significant dependence of total and fine aer

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Ilieva-Makulec, Krassimira, Paweł Dariusz Plichta, and Maciej Sierakowski. "Biomonitoring of Heavy Metal Air Pollution in Warsaw Using Two Moss Species Pleurozium schreberi and Sphagnum palustre." Studia Ecologiae et Bioethicae 19, no. 4 (2022): 111–24. http://dx.doi.org/10.21697/seb.2021.19.4.09.

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The aim of the study was to assess air pollution with heavy metals in Warsaw, on the basis of the concentrations of selected elements in moss samples. The active biomonitoring method (moss-bag technique) was applied using two moss species Pleurozium schreberi and Sphagnum palustre. Moss samples were collected in the Kampinos National Park, and the prepared moss bags were distributed and exposed on seven sites in Warsaw. The analysis of metals accumulated in mosses was performed twice in 2020, after two (August-September) and four months (August-November) of exposure. The concentrations of seve

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Ran, L., W. L. Lin, Y. Z. Deji, et al. "Surface gas pollutants in Lhasa, a highland city of Tibet: current levels and pollution implications." Atmospheric Chemistry and Physics Discussions 14, no. 8 (2014): 11787–814. http://dx.doi.org/10.5194/acpd-14-11787-2014.

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Abstract. Through several years of development, the city of Lhasa has become one of the most populated and urbanized areas on the highest plateau in the world. In the process of urbanization, current and potential air quality issues have been gradually concerned. To investigate the current status of air pollution in Lhasa, various gas pollutants including NOx, CO, SO2 and O3 were continuously measured from June 2012 to May 2013 at an urban site (29.40° N, 91.08° E, 3650 m a.s.l.). The seasonal variations of primary gas pollutants exhibited a peak from November to January with a large variabili

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Deng, Xueliang, Jian Chen, Rui Dai, et al. "The Effects of Planetary Boundary Layer Features on Air Pollution Based on ERA5 Data in East China." Atmosphere 14, no. 8 (2023): 1273. http://dx.doi.org/10.3390/atmos14081273.

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The planetary boundary layer (PBL) structure and its evolution can significantly affect air pollution. Here, the PBL’s characteristics and their association with air pollution were analyzed in Hefei, east China, using ERA5 reanalysis data, weather observations and air pollutant measurements from 2016 to 2021. In the near-surface level, air pollution was directly influenced by ground meteorological conditions, and high PM2.5 was normally related to weak wind speed, northwest wind anomalies, low temperature and high relative humidity. Moreover, in the trajectory analysis, air masses from the nor

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Burratti, Luca, Valentin Maranges, Michele Sisani, et al. "Determination of Pb(II) Ions in Water by Fluorescence Spectroscopy Based on Silver Nanoclusters." Chemosensors 10, no. 10 (2022): 385. http://dx.doi.org/10.3390/chemosensors10100385.

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In this work, a method to determine Pb(II) ions in model water is presented; the method is based on the fluorescence emission of a silver nanoclusters (AgNCs) colloidal solution, which is sensitive to lead ions. The presence of Pb(II) ions causes a photoemission enhancement of the AgNCs solution dependent on the pollutant concentration. The functional dependence is logarithmic in the range from 2.5 to 40 µM, and through the linearization of the calibration points, a linear function is determined and exploited for the extrapolation of the test Pb(II) concentrations with a precision estimated by

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Marrone, Erica, Cristina Longo, Jennifer O’Loughlin, et al. "Association between annual exposure to air pollution and systolic blood pressure among adolescents in Montréal, Canada." Health Promotion and Chronic Disease Prevention in Canada 43, no. 4 (2023): 191–98. http://dx.doi.org/10.24095/hpcdp.43.4.04.

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Introduction In adults, chronic exposure to air pollution is associated with elevated blood pressure, but few studies have examined this relationship in youth. We investigated the association between annual ambient concentrations of air pollutants (fine particulate matter [PM2.5] and nitrogen dioxide [NO2]) and systolic blood pressure (SBP) among adolescents in Montréal, Canada. Methods Participants were students aged 15 to 17 years who provided SBP and residential postal code data in 2004/05 through their enrolment in the Nicotine Dependence in Teens study. Annual estimates for 2004 of reside

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Zheng, Kaiming. "Applications of Biotechnologies in Carbon Capture and Sequestration." Theoretical and Natural Science 62, no. 1 (2024): 141–47. http://dx.doi.org/10.54254/2753-8818/62/20241512.

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Abstract. Global greenhouse gas concentrations have been steadily increasing without sign of slowing down since industrialization. The most significant greenhouse gas, CO2, has reached an unprecedented peak. CO2-negative emission technologies are a good way to reduce atmospheric CO2 concentrations. Among these, bioenergy carbon capture and sequestration (BECCS) is considered as a key technology for stabilizing global warming at a low level in the future. This paper reviews biotechnology applications in carbon utilization and carbon sequestration, analyzing their principles, advantages and disa

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García-Soidán, Pilar, and Tomás R. Cotos-Yáñez. "Use of Correlated Data for Nonparametric Prediction of a Spatial Target Variable." Mathematics 8, no. 11 (2020): 2077. http://dx.doi.org/10.3390/math8112077.

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The kriging methodology can be applied to predict the value of a spatial variable at an unsampled location, from the available spatial data. Furthermore, additional information from secondary variables, correlated with the target one, can be included in the resulting predictor by using the cokriging techniques. The latter procedures require a previous specification of the multivariate dependence structure, difficult to characterize in practice in an appropriate way. To simplify this task, the current work introduces a nonparametric kernel approach for prediction, which satisfies good propertie

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Verney-Carron, Aurélie, Loryelle Sessegolo, Roger-Alexandre Lefèvre, and Peter Brimblecombe. "Modelling the Alteration of Medieval Stained Glass as a Function of Climate and Pollution: Comparison between Different Methodologies." Heritage 6, no. 3 (2023): 3074–88. http://dx.doi.org/10.3390/heritage6030164.

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Most stained-glass windows installed during the Middle Ages have deteriorated over time due to climate and pollution. To reconstruct their alteration history over the centuries, evaluate the current environmental risk, and predict their alteration in the future, two modelling methodologies have been used. First, based on the short-term exposure of medieval-type glass in different sites, dose–response functions (DRFs) were established. These DRFs correlate relevant environmental factors (temperature, rain quantity, rain pH, relative humidity, and SO2 concentration) with the response of the mate

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Aida, Rachmawati, Fithriya Yulisiasih Rohmawati, and Ana Turyanti. "The Effect of Car Free Day (CFD) on Pollutant Emissions at Alternative Roads (Case Study: RE Martadinata Street, Bogor City)." Agromet 33, no. 1 (2019): 8–19. http://dx.doi.org/10.29244/j.agromet.33.1.8-19.

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Car Free Day (CFD) is a social campaign aimed to reduce the dependence of people on vehicle uses, which occurs once per week in Bogor. The idea intends to decrease the vehicle emissions. However, CFD is often to cause a new problem like the congestions, which are found on the nearby alternative roads, as happened in RE Martadinata Street, Bogor City. This study aims to compare the emission load and the concentrations of pollutants in ambient air during CFD (06.00-09.00 am) and non-CFD days in alternative road. We measured the following pollutants: CO, HC, NOx, PM10 and SO2. This research first

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Polivyanchuk, A. "MATHEMATICAL MODELING OF INFLUENCE THE OPERATION MODE DIESEL ENGINE ON THE CONTENT OF PARTICULATE MATTER IN EXHAUST GASES." Municipal economy of cities 3, no. 156 (2020): 62–68. http://dx.doi.org/10.33042/2522-1809-2020-3-156-62-68.

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The work is devoted to solving an urgent scientific and practical task – establishing mathematical models that describe the effect of operating modes of diesel engines on the content in the exhaust gases of a dangerous pollutant – particulate matter (PM). The purpose of the work was to create and study the accuracy and practical suitability of the calculation method estimating concentrations and emissions with exhaust gases PM by means of mathematical modeling of the influence on them of parameters that determine steady state and unsteady diesel operation modes. The studies were carried out on

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Chernikov, N. A., N. V. Tvardovskaya, and I. M. Okhremenko. "Influence of financing water protection measures in the field of transport on water quality of water bodies." BRIСS Transport 2, no. 2 (2023): 1–6. http://dx.doi.org/10.46684/2023.2.2.

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Transport is a major water consumer and source of environmental pollution, including water resources. In order to preserve and improve water quality in water bodies at industrial and transport enterprises, including railway enterprises, water protection measures entailing permanent signifi cant funding are required. The study is aimed to develop a methodology for determining dependence of water quality of the water body on the real financing of water protection measures; theoretical justifi cation of the choice of water quality of the water body from the quality of wastewater (WW) of water use

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Zhao, Hongbo, Yaxin Liu, Tianshun Gu, Hui Zheng, Zheye Wang, and Dongyang Yang. "Identifying Spatiotemporal Heterogeneity of PM2.5 Concentrations and the Key Influencing Factors in the Middle and Lower Reaches of the Yellow River." Remote Sensing 14, no. 11 (2022): 2643. http://dx.doi.org/10.3390/rs14112643.

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Fine particulate matter (PM2.5) is a harmful air pollutant that seriously affects public health and sustainable urban development. Previous studies analyzed the spatial pattern and driving factors of PM2.5 concentrations in different regions. However, the spatiotemporal heterogeneity of various influencing factors on PM2.5 was ignored. This study applies the geographically and temporally weighted regression (GTWR) model and geographic information system (GIS) analysis methods to investigate the spatiotemporal heterogeneity of PM2.5 concentrations and the influencing factors in the middle and l

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Liao, Zhiheng, Jiaren Sun, Jialin Yao, et al. "Self-organized classification of boundary layer meteorology and associated characteristics of air quality in Beijing." Atmospheric Chemistry and Physics 18, no. 9 (2018): 6771–83. http://dx.doi.org/10.5194/acp-18-6771-2018.

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Abstract. Self-organizing maps (SOMs; a feature-extracting technique based on an unsupervised machine learning algorithm) are used to classify atmospheric boundary layer (ABL) meteorology over Beijing through detecting topological relationships among the 5-year (2013–2017) radiosonde-based virtual potential temperature profiles. The classified ABL types are then examined in relation to near-surface pollutant concentrations to understand the modulation effects of the changing ABL meteorology on Beijing's air quality. Nine ABL types (i.e., SOM nodes) are obtained through the SOM classification t

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Yakusheva, Anastasia, Anastasia Sayapina, Lev Luchnikov, Dmitry Arkhipov, Gopalu Karunakaran, and Denis Kuznetsov. "Carbon Quantum Dots’ Synthesis with a Strong Chemical Claw for Five Transition Metal Sensing in the Irving–Williams Series." Nanomaterials 12, no. 5 (2022): 806. http://dx.doi.org/10.3390/nano12050806.

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Carbon quantum dots (CQDs) are an excellent eco-friendly fluorescence material, ideal for various ecological testing systems. Herein, we establish uniform microwave synthesis of the group of carbon quantum dots with specific functionalization of ethylenediamine, diethylenetriamine, and three types of Trilon (A, B and C) with chelate claws -C-NH3. CQDs’ properties were studied and applied in order to sense metal cations in an aquatic environment. The results provide the determination of the fluorescence quench in dots by pollutant salts, which dissociate into double-charged ions. In particular,

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Davila, Silvije, Marija Jelena Lovrić Štefiček, Ivan Bešlić, Gordana Pehnec, Marko Marić, and Ivana Hrga. "Comparison of Sensors for Air Quality Monitoring with Reference Methods in Zagreb, Croatia." Atmosphere 16, no. 4 (2025): 472. https://doi.org/10.3390/atmos16040472.

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Within the scope of “Eco Map of Zagreb” project, eight sensor sets (type AQMeshPod) were set up at an automatic measuring station at the Institute for Medical Research and Occupational Health (IMROH) for comparison with reference methods for air quality measurement during 2018. This station is a city background station within the Zagreb network for air quality monitoring, where measurements of SO2, CO, NO2, O3, PM10 and PM2.5, are performed using standardized methods accredited according to EN ISO/IEC 17025. This paper presents a comparison of pollutant mass concentrations determined by sensor

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Cropp, Roger, Georgina Kerr, Susan Bengtson-Nash, and Darryl Hawker. "A dynamic biophysical fugacity model of the movement of a persistent organic pollutant in Antarctic marine food webs." Environmental Chemistry 8, no. 3 (2011): 263. http://dx.doi.org/10.1071/en10108.

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Environmental contextPersistent organic pollutants (POPs) are potentially toxic chemicals capable of long distance transport and are often found far from their source. Little is known of their behaviour in Antarctica, where the marine plankton food web is driven by strong seasonal variations in solar radiation. Here the first dynamic coupled ecosystem–fugacity model to describe how POPs distribute through the Antarctic environment is presented. The model is used to identify the important processes that govern the presence of hexachlorobenzene in Antarctic plankton. AbstractPolar regions can be

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Lei, H., X. Z. Liang, D. J. Wuebbles, and Z. Tao. "Model analyses of atmospheric mercury: present air quality and effects of transpacific transport on the United States." Atmospheric Chemistry and Physics Discussions 13, no. 4 (2013): 9849–93. http://dx.doi.org/10.5194/acpd-13-9849-2013.

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Abstract. Atmospheric mercury is a toxic air and water pollutant that is of significant concern because of its effects on human health and ecosystems. A mechanistic representation of the atmospheric mercury cycle is developed for the state-of-the-art global climate-chemistry model, CAM-Chem (Community Atmospheric Model with Chemistry). The model simulates the emission, transport, transformation and deposition of atmospheric mercury (Hg) in three forms: elemental mercury (Hg(0)), reactive mercury (Hg(II)), and particulate mercury (PHg). Emissions of mercury include those from human, land, ocean

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Lei, H., X. Z. Liang, D. J. Wuebbles, and Z. Tao. "Model analyses of atmospheric mercury: present air quality and effects of transpacific transport on the United States." Atmospheric Chemistry and Physics 13, no. 21 (2013): 10807–25. http://dx.doi.org/10.5194/acp-13-10807-2013.

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Abstract. Atmospheric mercury is a toxic air and water pollutant that is of significant concern because of its effects on human health and ecosystems. A mechanistic representation of the atmospheric mercury cycle is developed for the state-of-the-art global climate-chemistry model, CAM-Chem (Community Atmospheric Model with Chemistry). The model simulates the emission, transport, transformation and deposition of atmospheric mercury (Hg) in three forms: elemental mercury (Hg(0)), reactive mercury (Hg(II)), and particulate mercury (PHg). Emissions of mercury include those from human, land, ocean

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Gushchin, I. A., D. V. Sofronov, V. D. Smolnikov, and I. A. Rymbaev. "Risk assessment for the industrial facility impact on the atmosphere." XXI Century. Technosphere Safety 6, no. 4 (2022): 340–47. http://dx.doi.org/10.21285/2500-1582-2021-4-340-347.

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Environmental pollution creates problems for health of people living in residential areas near pollution sources. Studies aimed at developing methods for investigating the impact of industrial facilities on the air is of interest. The purpose of this work is to analyze the methodology for assessing the risk of exposure of a technosphere object to the atmosphere. It was assumed that the enterprise in emergency mode emits pollutants through the source of emissions at the maximum single concentration of the substance exceeding the maximum permissible concentration. To calculate the impact on a hu

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Ostromsky, Tzvetan, Kiril Alexiev, and Stefan Parvanov. "Air pollution modelling of accidents involving hazardous substances." Journal of Physics: Conference Series 2910, no. 1 (2024): 012002. https://doi.org/10.1088/1742-6596/2910/1/012002.

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Abstract Air pollution modeling for accidents involving hazardous substances is a critical aspect of emergency response and environmental protection. This modeling aims to predict the dispersion and impact of toxic substances released into the atmosphere during accidents, such as industrial spills, transport accidents, chemical plant incidents or acts of terrorism. Such dangers are among the challenges which the modern society is facing and has to overcome. In this study we propose a systematic approach for organizing monitoring, collecting data from mobile sensors, creating situation developm

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Timoshenko, Alena N., Sergey I. Kolesnikov, Natalia A. Evstegneeva, et al. "Changes in the Activity of Oxidoreductases of Ordinary Chernozem During Platinum Contamination." UNIVERSITY NEWS. NORTH-CAUCASIAN REGION. NATURAL SCIENCES SERIES, no. 2 (222) (June 27, 2024): 131–37. http://dx.doi.org/10.18522/1026-2237-2024-2-131-137.

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The automotive industry is the main source of environmental pollution with platinum group metals, which increases the concentration of platinum in road dust, soil, and plants. This can lead to the achievement of toxic levels of this metal in the environment, and consequently, an imbalance of the ecosystem, a reduction in the microbial population, and a decrease in soil fertility. The effects of platinum on the activity of oxidoreductases of ordinary chernozem have been studied: the activity of catalase and dehydrogenase. Platinum was introduced into the soil in the form of chloride. Platinum c

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Vitaliy, Ivasenko, and Primisky Igor. "Analysis of emissions during the combustion of pellets in boiler units." Technology audit and production reserves 4, no. 3(66) (2022): 29–34. https://doi.org/10.15587/2706-5448.2022.263926.

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<em>The object of research is the technological process of burning pellets in boilers. Using solid fuel boilers on pellets for heat production, they are trying to reduce dependence on hydrocarbon energy resources. Often such boilers are installed for autonomous heating of schools and other communal facilities. One of the most problematic areas is the analysis of the environmental impact when using pellets as a fuel for municipal boiler houses in urban areas. Boilers operating on solid fuels are characterized by a larger range of pollutants, as well as large values of concentrations emitted thr

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Splodytel, A. "ECOLOGICAL AND GEOCHEMICAL ESTIMATION OF THE SPREADING OF TECHNOGENIC ELEMENTS IN THE TERRITORY OF KIVERTSIV NATIONAL NATURAL PARK "TSUMANSKA PUSHCHA"." Visnyk of Taras Shevchenko National University of Kyiv. Geology, no. 2 (93) (2021): 15–23. http://dx.doi.org/10.17721/1728-2713.93.02.

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Analysis of heavy metals content in the soils of the territory showed its heterogeneous distribution and dependence on available sources of technogenic impact. Geochemical accumulation coefficients were calculated and analyzed. The highest concentrations of manganese and chromium are in soils developed on forest deposits. The highest concentrations of nickel and copper are in soils developed on water-glacial deposits. Most of the studied heavy metals exceed the regional geochemical background. In terms of gross content in soils, trace elements form the following geochemical series: Zn> Cu&g

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Tokarek, Travis W., Charles A. Odame-Ankrah, Jennifer A. Huo, et al. "Principal component analysis of summertime ground site measurements in the Athabasca oil sands with a focus on analytically unresolved intermediate-volatility organic compounds." Atmospheric Chemistry and Physics 18, no. 24 (2018): 17819–41. http://dx.doi.org/10.5194/acp-18-17819-2018.

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Abstract. In this paper, measurements of air pollutants made at a ground site near Fort McKay in the Athabasca oil sands region as part of a multi-platform campaign in the summer of 2013 are presented. The observations included measurements of selected volatile organic compounds (VOCs) by a gas chromatograph–ion trap mass spectrometer (GC-ITMS). This instrument observed a large, analytically unresolved hydrocarbon peak (with a retention index between 1100 and 1700) associated with intermediate-volatility organic compounds (IVOCs). However, the activities or processes that contribute to the rel

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Ma, Chiyue. "Ecological Risk Assessment and Environmental Policy Analysis Based on Bayesian Networks." Academic Journal of Science and Technology 13, no. 3 (2024): 1–6. https://doi.org/10.54097/xewhhv72.

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At present, ecological and environmental problems are becoming increasingly serious. Traditional risk assessment methods are difficult to fully integrate the complex relationships among multiple variables and lack the ability to dynamically analyze uncertainty and conditional dependence, which affects the scientific nature of environmental policies. To address this problem, this paper proposes an ecological risk assessment and environmental policy analysis framework based on Bayesian networks, aiming to effectively quantify ecological risks and provide support for policy decisions. In terms of

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Li, Yingruo, Chunxiang Ye, Jun Liu, et al. "Observation of regional air pollutant transport between the megacity Beijing and the North China Plain." Atmospheric Chemistry and Physics 16, no. 22 (2016): 14265–83. http://dx.doi.org/10.5194/acp-16-14265-2016.

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Abstract. Megacities have strong interactions with the surrounding regions through transport of air pollutants. It has been frequently addressed that the air quality of Beijing is influenced by the influx of air pollutants from the North China Plain (NCP). Estimations of air pollutant cross-boundary transport between Beijing and the NCP are important for air quality management. However, evaluation of cross-boundary transport using long-term observations is very limited. Using the observational results of the gaseous pollutants SO2, NO, NO2, O3, and CO from August 2006 to October 2008 at the Yu

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Gerosa, Giacomo, Cristina Mazzali, and Antonio Ballarin-Denti. "Techniques of Ozone Monitoring in a Mountain Forest Region: Passive and Continuous Sampling, Vertical and Canopy Profiles." Scientific World JOURNAL 1 (2001): 612–26. http://dx.doi.org/10.1100/tsw.2001.84.

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Ozone is the most harmful air pollutant for plant ecosystems in the Mediterranean and Alpine areas due to its biological and economic damage to crops and forests. In order to evaluate the relation between ozone exposure and vegetation injury under on-field conditions, suitable ozone monitoring techniques were investi-gated. In the framework of a 5-year research project aimed at ozone risk assessment on forests, both continuous analysers and passive samplers were employed during the summer seasons (1994�1998) in different sites of a wide mountain region (80 x 40 km2) on the southern slope of th

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Tewari, Pranav, Pei Ma, Gregory Gan, et al. "Non-linear associations between meteorological factors, ambient air pollutants and major mosquito-borne diseases in Thailand." PLOS Neglected Tropical Diseases 17, no. 12 (2023): e0011763. http://dx.doi.org/10.1371/journal.pntd.0011763.

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Background Transmission intensity for mosquito-borne diseases are highly heterogenous and multi-factorial. Understanding risk factors associated to disease transmission allow the optimization of vector control. This study sets out to understand and compare the combined anthropogenic and environmental risk factors of four major mosquito-borne diseases, dengue, malaria, chikungunya and Japanese encephalitis in Thailand. Methods An integrated analysis of mosquito-borne diseases, meteorological and ambient air pollutants of 76 provinces of Thailand was conducted over 2003–2021. We explored the use

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Pukish, Arsen V., Olha I. Sydorenko, Oleh M. Mandryk, Yaroslava S. Korobeinykova, and Oleh M. Tuts. "The effect of pollutants on the content of nutrients in soil." Nafta-Gaz 79, no. 4 (2023): 266–77. http://dx.doi.org/10.18668/ng.2023.04.06.

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Soil degradation occurs as a result of the ingress and accumulation of excessive amount of pollutants in the soil. The article presents the results of theoretical and experimental studies of the complex effect of soil contamination (concentration of petroleum products, toxic salts, dense residue, sodium ions, sulfate ions, magnesium ions, calcium, chloride ions, bicarbonate ions) on the content of nutrients (alkaline hydrolyzed nitrogen, phosphorus, potassium, humus). A detailed analysis of scientific papers has been carried out, based on which the main scientific tasks solved in the article h

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Grange, Stuart K., Hanspeter Lötscher, Andrea Fischer, Lukas Emmenegger, and Christoph Hueglin. "Evaluation of equivalent black carbon source apportionment using observations from Switzerland between 2008 and 2018." Atmospheric Measurement Techniques 13, no. 4 (2020): 1867–85. http://dx.doi.org/10.5194/amt-13-1867-2020.

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Abstract. Black carbon (BC) or soot is a constituent of particulate matter (PM) which is relevant for negative human health and climate effects, and despite the lack of direct legal limits, it is recognised as an important atmospheric pollutant to monitor, understand, and control. Aethalometers are instruments which continuously monitor BC by measuring absorption at a number of distinct wavelengths. If collocated elemental carbon (EC) observations are used to transform these values into BC mass, by convention, the result is named equivalent black carbon (EBC). BC emitted by different combustio

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Sekula, Piotr, Zbigniew Ustrnul, Anita Bokwa, Bogdan Bochenek, and Miroslaw Zimnoch. "Random Forests Assessment of the Role of Atmospheric Circulation in PM10 in an Urban Area with Complex Topography." Sustainability 14, no. 6 (2022): 3388. http://dx.doi.org/10.3390/su14063388.

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This study presents the assessment of the quantitative influence of atmospheric circulation on the pollutant concentration in the area of Kraków, Southern Poland, for the period 2000–2020. The research has been realized with the application of different statistical parameters, synoptic meteorology tools, the Random Forests machine learning method, and multilinear regression analyses. Another aim of the research was to evaluate the types of atmospheric circulation classification methods used in studies on air pollution dispersion and to assess the possibility of their application in air quality

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