Study of Air Pollution and Atmospheric Stability in Ciuc Basin - Romania

Abstract

The atmospheric stability plays an important role in the accumulation of air pollutants and greatly influences their degradation, dispersion and deposition. These atmospheric qualities can be determined with various methods (Richardson number, Monin -Obukhov length, SRDT method) and the pollutant concentration increase demonstrates the atmospheric stability. In this study the cold periods were the most stable as well the PM 10 and CO pollutants had high concentrations. Between these two pollutants the correlation is high because their sources are the same: transport and biomass burning. The study of hourly averages highlighted the importance of traffic intensity since the concentration variation follows the traffic intensity. An increase in the wind speed in the basin results in the pollutants concentrations decrease, the negative correlation with the temperature indicating the importance of the photochemical processes.

Analysis of air Quality in the Area of Coal-fired Power Plants

“…Analyzing the data obtained for the CO pollutant, it was ascertained that, as in the case of nitrogen dioxide, during December 2017 the concentration values (the maximum daily 8-hour average) were well below the permitted limit value, the highest value being recorded on December 13, Suspended particles are a particle agglomerate of different sources, of different sizes, compositions and properties, representing a complex mixture of organic and inorganic substances, and their concentration varies depending on the season (summer and autumn PM 10 is low in concentration) [21]. The reference method for the sampling and measurement of the PM 10 fraction is described in European Standard EN 12341/1999 [22] and the measurement principle is based on the collection of PM 10 fraction separated from the airborne particles on the filters and the laboratory gravimetric determination of the PM 10 dust concentration and heavy metals (Pb, Cd, Ni, As) by atomic absorption spectrometry.…”

“…Carbon monoxide is a major pollutant in urban air, with total emissions of this pollutant exceeding the sum of all other pollutants. The reference method for the measurement of carbon monoxide is that laid down in SR EN 14626 and the standardized method for measurement concentration is non-dispersive infrared spectroscopy [21]. The CO monitoring during December 2017 was carried out by the GJ-3 automatic station, and the interpretation of the obtained results was made by reference to the Law no.…”

Research on CO Pollution in Urban Areas

“…The monitored pollutants, the measurement methods, the limit values, the alert and information thresholds as well as the criteria for the location of the monitoring points are set by the national legislation on atmospheric protection and comply with the requirements of the European regulations [21][22][23][24]. To determine the carbon monoxide concentration, air quality monitoring stations in Targu-Jiu, Rovinari and Turceni are comprised of a CO-monitor Europe ML 9830 analyzer, the reference method for measuring carbon monoxide is the standard SR EN 14626 and the standardized method for measuring concentration is non-dispersive infrared spectroscopy [18].…”

“…CO emissions occur in densely populated cities due to car fleet and traffic, with the highest concentration being in heavy traffic stations than residential areas [18] and depends on traffic flow, speed, vehicle characteristics such as be the type, size, age of a vehicle, engine condition, control systems, vehicle maintenance and weight, weather conditions, season, topography, long-range transboundary transport [19]. The waving of car tax in 2017 has led to massive imports of used vehicles, resulting in huge pollution damage and a high medium and long term risk in terms of health effects (at the end of 2017 the fleet has increased by 9% compared to 2016, but also by a higher percentage of old vehicles and diesel engines).…”

Ageing of Some Painting Materials Subjected to Thermal Treatment in Natural Esters

“…There is of an utmost importance the local and global monitoring of the pollutants which are a consequence of human activity. [7][8][9][10][11]. Further to the technological development, our life fully depends on continuous and safe electrical power supply.…”