Introduction: One of the most important contaminants in the cement industry are environmental suspended particles (PM2.5 and PM10), which cause respiratory and pulmonary diseases in humans. Materials and methods: This descriptive - analytical study was carried out in 2016-2017 on the peripheral particulate matter of Khash cement plant. Sampling was performed at 8 environmental stations of Khash Cement Company in spring, summer, fall and winter. A total of 576 samples were sampled of peripheral particulate matter. Results: The amount of particulate matter was PM2.5 2.82 to 24.63 μg/m3, respectively. The highest PM2.5 content was obtained in spring (24.32±2.51 μg/m3). The lowest amount of particulate matter PM2.5 in different seasons were measured in substation (P<0.05). The amount of particulate matter was PM10 19.98 to 68.22 μg/m3, respectively. The highest PM10 content was obtained in autumn (64.92±3.76 μg/m3). The lowest amount of particulate matter PM10 in spring and summer were measured in substation (P<0.05), but the lowest amounts in the autumn at the entrance door and in winter was observed in wastewater treatment. Conclusion: In this study, the amount of PM2.5 and PM10 peripheral particulate matter in Cement Company was lower than WHO and USEPA standard. According to the results it can be stated that the suspended particles Khash Cement Company environment for human respiration were within acceptable limits.
Human needs clean and healthy air. Clean air is more important than food and water. Industries and industrial activities produce a lot of gases and particles that pollute the air. Air pollution, as one of the concerns of the present age, in addition to environmental degradation and economic damage, poses serious risks to human health. Continuous monitoring of air quality to identify pollut- ants and identify sources of their emissions is also one of the basic strategies for controlling air pollution. Unhealthy air quality causes a lot of damage to humans and the environment and various health effects. Air pollution is a major environmental threat to human health in many developed or develop- ing cities around the world. The level of air pollution is usually determined by the concentration of air pollutants such as dioxide hydrogen, sulfur di- oxide, carbon monoxide, ozone and suspended particles. In recent years, air quality has been a major factor in the emergence of quality of life in urban areas, especially in densely populated and industrial areas. Air pollution with a wide range of suspended particles has effects on human health, including the respiratory and cardiovascular systems, as well as mortality. In this article, the effects of air pollution on the environment and sources and the source of pollution in Ahvaz city are introduced.
Background & Aims of the Study: This study aimed to evaluate the environmental risk and human health risk of heavy metals in some agricultural products cultivated in Dezful and Shushtar in 2020. Materials and Methods: In this research, 18 samples of 1 kg of crops grown on farms in the summer of 2020 were collected randomly from 6 stations in two areas of (Safiabad & Shamsabad farms) and two regions of Shushtar (Gelalak & Shoaibiyeh farms). ICP model Varian 710-ES measured heavy metals. Results: The average amount of zinc in tomatoes, cucumbers, potatoes, and onions grown in farms were 38.396, 23.440, 16.136, and 90.706 mg/kg, and in cultivated lands of Shushtar, 11.690, 6.730, 5.713, and 7.406 mg/kg were obtained. Analysis of variance showed that the heavy metals lead, cadmium, and chromium in crops of Dezful and Shushtar were significantly different (P<0.05), but in the case of zinc, copper, and nickel in tomato, cucumber, No significant difference was observed between potato and onion (P>0.05). In tomato and cucumber crops grown in Dezful and Shushtar and potatoes in Shushtar, the hazard values of cadmium, chromium, zinc, and copper were higher than 1. In the tomato crop and the potatoes grown in Shushtar, the lead metal risk index values were higher than 1. Nickel metal hazard index values were obtained in cultivated agricultural products of potatoes, cucumbers, and tomatoes in Shushtar and adults and children less than one. Conclusion: The carcinogenic rates of cadmium, chromium, and lead in the crops of Shushtar and were higher than the allowed limit of 4-10. The carcinogenicity rate of nickel metal in Shushtar and Dezful crops was 4-10 lower than the permitted limit.
This study provides an overview of the cause, source, origin and effects of dust storms. Desertification and climate change are the most important envi- ronmental challenges in arid regions of the world, and their effects, includ- ing air pollution, affect people all over the world. Although air pollution is a harmful and pathogenic phenomenon for all people and at all ages, a wide range of people, including the elderly, pregnant women, children and the sick, are more vulnerable. Dust is one of the environmental problems that ulti- mately causes respiratory and skin diseases in humans. Iran is also one of the countries in the arid and semi-arid region, which is surrounded by dust storms. The internal source of dust storms includes southwest, east and cen- tral Iran. In general, there are two approaches to environmental change. The first approach is to ignore these changes and continue the current situation, which will only result in more environmental degradation. Another approach is to identify these changes from the past to the present and to develop an environmental management program to control these changes and to plan to improve the environmental situation.
In the era of industrialization and technological progress, pollution has reduced the quality of life for humans. Heavy metal pollution is one of the main causes of environmental degradation. The underlying causes are natural as well as human. Heavy metal contamination of soil has become a worldwide environmental issue that has attracted considerable public attention, mainly due to increased concern for the safety of agricultural products. Heavy metals refer to some metals and metals with biological toxicity such as cadmium, mercury, arsenic, lead and chromium. These elements enter the soil agricultural ecosystem through natural processes resulting from raw materials and through human activities. Heavy metal pollution is a great threat to the health and well-being of animals and humans due to the risk of potential accumulation through the food chain. The main sources of heavy metal pollution are air pollution, river sediments, sewage sludge and municipal waste compost, agricultural chemicals such as fertilizers and pesticides, and industrial wastes such as factories that release chemicals. Heavy metals can enter the water supply through industrial and consumer wastes or even from acid rain that decomposes soils and releases heavy metals into streams, lakes, rivers and groundwater.
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