List of Articles Pollutants

• Open Access Article
  • Abstract Page
  • Full-Text
  
  1 - Time and Space Changes of Air Pollutants Using GIS (Case Study: North Semnan Tehran
  mohsen ranjbar Batoul Bahak
  Tehran's metropolitan area is considered one of the most polluting cities in the world due to population concentration, indoor and suburban industries, vehicular traffic, high fossil fuel consumption, special geographical location, unique climate and topographic feature More

  Tehran's metropolitan area is considered one of the most polluting cities in the world due to population concentration, indoor and suburban industries, vehicular traffic, high fossil fuel consumption, special geographical location, unique climate and topographic features. Not be The main objective of this study was to investigate and analyze the temporal and spatial behavior of pollutants (carbon monoxide, nitrogen dioxide, troposphere ozone, suspended particles, and sulfur dioxide) in the northern part of Tehran. In order to investigate the changes of air pollutants in temporal and spatial scales, data from meteorological stations and pollutant stations were used by Air Quality Control Company and Tehran Environmental Organization during the years 1387- 1387. Data were calculated using SPSS and Excel software and the results of statistical analyzes of the distribution of pollutants in spatial and temporal scales using Arc GIS 9.3 software and the Inverse Distance Inverse Interpolation (IDW) function as maps Tables and charts are prepared and drawn up. Based on the results of the study, the concentration of three pollutants of carbon monoxide, nitrogen dioxide and sulfur dioxide in the winter peak, but the concentration of suspended particles and ozone troposphere in summer is higher. All pollutants showed significant correlation with climatic elements. The correlation coefficient of carbon monoxide, nitrogen dioxide and sulfur dioxide with negative wind and positive pressure and surface temperature are positive. The correlation of ozone and particulate matter with the temperature and wind speed is positive and with negative pressure and humidity. Spatial distribution of centers with severe pollution is mainly due to the severity of pollution, mainly around the crisis headquarters, the Municipality of District 7, Sharif University and the Rocks Park, Aqdasiya and Puncak Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  2 - Economic Load Dispatch in Power Plants, Taking into Account Environmental Pollutants and System Security Indices Using Multi-Objective Harmony Search Algorithm
  H. Sharifi محمود اوکاتی صادق
  Public sensitivity to environmental issues in the economic dispatch is also impressive. In this case it is necessary to consider the costs of pollution in the economic dispatch. Before the introduction of the concept of power system security, the subject of economic loa More

  Public sensitivity to environmental issues in the economic dispatch is also impressive. In this case it is necessary to consider the costs of pollution in the economic dispatch. Before the introduction of the concept of power system security, the subject of economic load dispatch normally focused on economic aspects rather than security of the system. Today, with the expansion of the power grid and system load, combination of stability and economic load dispatch indices has become a critical necessity. This article will consider the issue of solving the economic dispatch of power plants considering the emissions and security indices of the network. Using penalty functions, system security indices are added to the objective function of economic load dispatch problem. Since fuel costs and emission reduction targets are relatively contrasting, problem solving of economic load dispatch and emission reduction leads to a multi-objective optimization problem. Given the complexity of objective functions and necessity of the considering the practical constrains of power plants operation and security indices reveal more than ever the need to use efficient methods to optimize. In this article Multi Objective Harmony Search algorithm (MOHS) has been used to solve the problem. The results show that MOHS algorithm is excellent for convergence and accuracy compared to other employed methods. The proposed testing system used to solve the problem is IEEE test system with 10 power generation units, 39 bus and 46 transmission line. Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  3 - Study of the different microbial biodegradation methods efficiency in the removal of crude oil hydrocarbon contaminants
  Farhood Navaie Abbas Hashemizadeh
  Petroleum hydrocarbon pollutants are one of the hardest compounds in terms of decomposition and control and classified as stable and important organic pollutants that have adverse effects on human health and the environment and combating environmental pollution caused b More

  Petroleum hydrocarbon pollutants are one of the hardest compounds in terms of decomposition and control and classified as stable and important organic pollutants that have adverse effects on human health and the environment and combating environmental pollution caused by them is an important issue for the world and human societies. Although the removal of these pollutants from the environment is a major problem, biodegradation (which uses natural microbial biodegradation activity) is an ecofriendly and economical approach to control these types of contaminants and has become a pivotal method of cleaning up environments contaminated with petroleum hydrocarbons. The present study provides a comprehensive, uptodate and efficient review of the bioremediation of petroleum hydrocarbon pollutants, taking into account the hydrocarbon alterations in microorganisms with a particular focus on the new insights gained in recent years. Also, the metabolism of hydrocarbons in microorganisms has been described by reviewing research presented in recent years. The results of studies show well that petroleum hydrocarbon pollutants are biodegradable using some microorganisms such as oleophilic and their removal by this method is cost-effective and economical. Microbial biodegradation of petroleum hydrocarbon contaminants uses the enzymatic catalytic activities of microorganisms to increase the degradation of contaminants several times more than traditional methods Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  4 - Environmental effects of plastic waste entering the sea and its management methods (Review study)
  Seyedeh Bahareh Aimi gholamreza allahghlipour yoosf azimi
  Abstract One of the consequences of the developments of the world society in the last century is the development of urbanization and the focus of human communities in urban areas. The growth of population and tendency to urbanization is one of the developments of the More

  Abstract One of the consequences of the developments of the world society in the last century is the development of urbanization and the focus of human communities in urban areas. The growth of population and tendency to urbanization is one of the developments of the current century, which intensified the use of resources and the production of waste. This increase in population along with the development of urbanization leads to the consumption of natural resources and as a result, it leads to production of all kinds of wastes. So, waste management in the world is becoming a big challenge in urban areas. This challenge is greater, especially in big towns. These wastes have not only entered the human ecosystem and the land of the earth, but also entered the seas and it has also left unfavorable effects on aquatic creatures. In order to keep pace with the needs of rapid economic development and continuous population growth, and also because of the vital role of waste management in preserving the environment and public health, marine waste management is one of the current priorities of societies. Disposal and accumulation of waste in the marine environment is one of the environmental threats that is increasing at a very fast pace. The purpose of this study is to review sources and collect information about the entry of plastic waste into the sea, its environmental effects and methods of marine plastic waste management. Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  5 - Application of electrospun nanofibers for gaseous pollutants adsorption
  hanieh shaki
  Carbon dioxide is the most important greenhouse gas that is released in large quantities into the atmosphere. Excess carbon dioxide in the atmosphere is a problem for earth and increase the temperature and creates problems that affect human existence, such as severe tor More

  Carbon dioxide is the most important greenhouse gas that is released in large quantities into the atmosphere. Excess carbon dioxide in the atmosphere is a problem for earth and increase the temperature and creates problems that affect human existence, such as severe tornadoes, storms, floods, droughts and acid rain. The largest source of outdoor CO2 is fossil fuel combustion, which are the main source of energy used to meet human energy demand now and in the near future. In recent years, nanofiber membranes have been highly regarded as pollutant adsorbents compared to conventional adsorbents, they have properties such as porous structure, high specific surface area, high penetration flux and selectivity, low pressure drop, high flexibility and targeted adsorption. So, electrospun nanofiber membranes have excellent potential for adsorption and separation of carbon dioxide from the air. In addition to the extremely high surface to volume ratio, modified electrospun nanofibers have different functional groups that improve their performance. Therefore, electrospun nanofiber membranes have excellent potential for adsorption and separation of carbon dioxide from the air Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  6 - Assessment of Water Quality parameter using RGB images in Anzali wetland
  Mohadese Tavakoli Mohammad Javad Chaeichi
  10.61186/jert.44597.8.14.163
  Wetlands are one of the most prominent ecosystems in the world. These vital and diverse habitats are among life-giving systems that have no alternative. However, none of the world's ecosystems have experienced human-centered injuries and damages as much as wetlands. One More

  Wetlands are one of the most prominent ecosystems in the world. These vital and diverse habitats are among life-giving systems that have no alternative. However, none of the world's ecosystems have experienced human-centered injuries and damages as much as wetlands. One of the main threats to Gilan wetlands are human factors such as urban, domestic and industrial wastewater, overfishing and converting wetland marginal lands into agricultural lands. In this study, RGB images were used to assess the water quality parameters of Anzali wetland (Beheshti Island Station) and the related data were compared to the values obtained from the TSS measurement. Based on the obtained data, the intensity of red color (R) in the macroscopic images (with the naked eye) from the wetland can be an environmental indicator to measure TSS concentration. The results of RGB analysis for red color with a correlation coefficient of 0.8513, for green color (G) with a correlation coefficient of 0.832 and for blue color (B) with a correlation coefficient of 0.663 were obtained. Finally, a correlation coefficient (R2=0/8035) between the decrease of RGB values and the increase of TSS concentration was obtained. Other parameters such as pH and Secchi Depth test were also measured in this study. Manuscript profile