Riassunto analitico
As we know, air pollution has many harmful effects not only for humans but also for living organisms. The addition of any substance to the air changes the physical and chemical properties of the clean air to some extent. All impurities in the air we inhale do not necessarily cause harm. Due to the chemical nature of air pollutants, some of them are harmful in low concentrations while others are harmful in high concentrations in the air. Also, the exposure of the body to polluted air is also an important factor. Therefore, the primary factors affecting human health are: the nature of pollutants, the concentration of pollutants, the duration of exposure, the health status of the recipient, and the age group of the recipient.
The expansion of urbanization and the development of cities along with the rapid increase of the population and the development of industrial activities with the excessive consumption of fossil fuels have greatly increased the pollution, the consequences of which primarily affect the residents of the cities in the form of various diseases and respiratory diseases, the exacerbation of heart and lung diseases. On a small scale, local pollutions that cause effects ranging from simple nuisance to long-term and dangerous diseases have been considered, and issues such as the destruction of the ozone layer, acid rain, and global warming are given importance. Since some types of substances are known as air pollutants, it is important to review them and their sources and effects on human health: nitrogen compounds, carbon compounds and sulfur compounds.
In recent years, nanotechnology has been used to reduce air pollution and has taken a very important step in this field by making nanoadsorbers. Some nanomaterials are very suitable for absorbing air pollutants due to their high porosity. There are different methods for layering nano materials, each of these methods has its own advantages and disadvantages. One of the coating methods is dip-casting, which is easily accessible. Three nanomaterials have been used to make two nanocomposites: Nanocomposite 1 is made of magnesium oxide and calcium carbonate. Nanocomposite 2 is made of zeolite and calcium carbonate.
In order to investigate nanocomposites and absorption of polluting gases, the following analyzes have been performed:
XRD analysis: This analysis has been used to investigate the crystalline properties of magnesium oxide, calcium carbonate and zeolite nanoparticles. According to the presented diagrams, the given nanoparticles and the purity of the substance can be seen.
BET analysis: The BET nitrogen adsorption- desorption isotherm diagram, the BJH pore size distribution and Langmuir model are plotted. The data obtained from the analysis indicates that the nanocomposites produced have high porosity and are able to adsorb polluting gases.
FESEM analysis: This analysis is performed for magnesium oxide and calcium carbonate at different resolution. As can be seen in the pictures, the made absorber has integrated and interconnected pores, porosity and channels, which indicates an effective absorber for better gas absorption. Because the greater the porosity and permeability of an absorber, the greater the gas absorption.
|
Abstract
As we know, air pollution has many harmful effects not only for humans but also for living organisms. The addition of any substance to the air changes the physical and chemical properties of the clean air to some extent. All impurities in the air we inhale do not necessarily cause harm. Due to the chemical nature of air pollutants, some of them are harmful in low concentrations while others are harmful in high concentrations in the air. Also, the exposure of the body to polluted air is also an important factor. Therefore, the primary factors affecting human health are: the nature of pollutants, the concentration of pollutants, the duration of exposure, the health status of the recipient, and the age group of the recipient.
The expansion of urbanization and the development of cities along with the rapid increase of the population and the development of industrial activities with the excessive consumption of fossil fuels have greatly increased the pollution, the consequences of which primarily affect the residents of the cities in the form of various diseases and respiratory diseases, the exacerbation of heart and lung diseases. On a small scale, local pollutions that cause effects ranging from simple nuisance to long-term and dangerous diseases have been considered, and issues such as the destruction of the ozone layer, acid rain, and global warming are given importance. Since some types of substances are known as air pollutants, it is important to review them and their sources and effects on human health: nitrogen compounds, carbon compounds and sulfur compounds.
In recent years, nanotechnology has been used to reduce air pollution and has taken a very important step in this field by making nanoadsorbers. Some nanomaterials are very suitable for absorbing air pollutants due to their high porosity. There are different methods for layering nano materials, each of these methods has its own advantages and disadvantages. One of the coating methods is dip-casting, which is easily accessible. Three nanomaterials have been used to make two nanocomposites: Nanocomposite 1 is made of magnesium oxide and calcium carbonate. Nanocomposite 2 is made of zeolite and calcium carbonate.
In order to investigate nanocomposites and absorption of polluting gases, the following analyzes have been performed:
XRD analysis: This analysis has been used to investigate the crystalline properties of magnesium oxide, calcium carbonate and zeolite nanoparticles. According to the presented diagrams, the given nanoparticles and the purity of the substance can be seen.
BET analysis: The BET nitrogen adsorption- desorption isotherm diagram, the BJH pore size distribution and Langmuir model are plotted. The data obtained from the analysis indicates that the nanocomposites produced have high porosity and are able to adsorb polluting gases.
FESEM analysis: This analysis is performed for magnesium oxide and calcium carbonate at different resolution. As can be seen in the pictures, the made absorber has integrated and interconnected pores, porosity and channels, which indicates an effective absorber for better gas absorption. Because the greater the porosity and permeability of an absorber, the greater the gas absorption.
|
