Who is the main culprit of air pollution in metropolitan areas?

However, he has been to blame for years air pollution In big cities and especially Tehran between dual Automakers And the fuel is in motion. One day, low-quality fuel is blamed on the first tier of air pollution, and the next day, non-standard vehicles sit on the defendant’s stand, with air pollution damages of $ 7 billion a year and $ 2.6 billion in air pollution damages in Tehran alone. And of course, particulate matter is one of the most important pollutants in a metropolis like Tehran.

Of course, considering the operation of the refinery projects and at the top of them, the Persian Gulf Star Refinery and the production of gasoline with Euro 4 and 5 standards, the accusation of gasoline pollution is far from expected.

Both the National Standards Organization and the Environmental Protection Agency have already endorsed the quality of gasoline, stating that the important factors are not in the permissible level but in the size of international standards.

Accordingly, the Air Quality Control Company has announced that the gasoline distributed in Tehran has more sulfur than allowed, and this was in the context that both the National Organization for Standardization, as the custodian of fuel monitoring, approved the quality of Tehran gasoline and the National Refining Company The distribution of petroleum products containing sulfur in gasoline is not only lower than 50 PPM, but also about 24.9 PPM.

Production of 81% of Iranian gasoline with Euro 4 and 5 standards

The Minister of Oil had previously said that the government has made great efforts to ensure the quantity and quality of gasoline, and now our gasoline production is Euro 4, and the reduction of polluted days last year confirms this claim.

Of course, this claim can also be proved by numbers. Currently, Iran’s gasoline production capacity is 112 million liters per day, of which 91 million liters are produced with Euro 4 and 5 standards, which shows an 81% share in this sector.

According to the CEO of Tehran Air Quality Control Company, referring to the decrease in the concentration of volatile organic compounds in the air of the capital, he said: “For the first time in recent years, the amount of benzene pollutants in Tehran is in acceptable and permissible conditions according to international standards.” Is.

“Hossein Shahidzadeh” had emphasized about volatile organic compounds in the air of Tehran that one of the most important pollutants in Tehran is volatile organic compounds that are created due to incomplete combustion of fuel in vehicles and evaporation of gasoline vapors, especially in gas stations and cars.

He added: “Volatile organic compounds include benzene, toluene, ethylbenzene and xylene, and due to the release of cars and some industries in the open air in Tehran and other metropolitan areas.”

Shahidzadeh also stated that volatile organic compounds play a significant role in the formation of secondary pollutants such as ozone: The main source of benzene and other volatile organic compounds in urban areas are mobile sources of pollutants such as cars and the largest source of these pollutants are gasoline vehicles.

Reduce unhealthy days in Tehran

The National Standard Organization of Iran, stating that the National Organization for Standardization, regardless of any political, price or other considerations, has the power to pursue this issue on the agenda, has repeatedly emphasized in the past that in previous years the organization was one of the complainants of gasoline quality. But experiments have shown that the amount of sulfur in gasoline is even lower than the standard, and the reduction in the number of days with unhealthy weather in Tehran is evidence of this.

Also, Issa Kalantari, the head of the Environmental Protection Organization, had previously emphasized in a response that the amount of sulfur in gasoline in Tehran is lower than the standard and the quality of gasoline in this area is not a problem.

However, the cooling of the air still makes “fog” the guest of Tehranians and other residents of the country’s metropolises.

But what is the cause?

Perhaps the answer to this question can be found in the speeches of the Deputy Minister of Human Environment of the Environmental Protection Agency.

According to Massoud Tajrishi, Euro 4 and 5 petrol are currently used in metropolitan areas, but when this fuel enters normally old cars, it increases the volume of fuel consumption and pollution and increases its role in producing pollution.

Regarding the role of gasoline and car fuel in air pollution in metropolitan cities, including Tehran, he said: “We in the country are no longer worried about the standard of fuel that we had about 15 years ago because at that time we used petrochemical products.”

He continued: “Since the Persian Gulf Star refinery entered the circuit, we have no problem in terms of using fuels that are polluting, and currently in the metropolises, Euro 4 and 5 gasoline is consumed, but when this fuel enters cars or motorcycles, which usually They are old (Peykan car still travels in cities) and have incomplete combustion, they can not use less fuel and produce less pollution like new cars.

The Deputy Minister of Human Environment of the Environmental Protection Agency, pointing out that despite the standard fuel, but still the average volume of fuel consumption is high, said: ‌ This high fuel consumption causes this high volume of consumption in used cars also plays a role in fuel pollution Raise.

Tajrishi stated: If you have the best fuel, but your average consumption is between 10 to 12 liters per 100 kilometers in cities (while the standard in the world is a maximum of 6 liters), this will lead to the production of pollutants and will have an impact. Increase fuel emissions.

Increase fuel consumption with the rise of waste

Research shows that the traffic of worn-out cars and motorcycles, in addition to increasing the volume of air pollutants, increases fuel consumption in the country. For this reason, in different governments, the need to implement the plan to modernize the country’s worn-out fleet has always been emphasized and some plans have been implemented in this regard, but these plans do not meet all the needs of the country and in some cases we have seen the implementation of plans stopped.

Air pollution caused by automobile resources in the country’s metropolises is considered as one of the environmental problems. In this regard, worn-out cars have an undeniable role with double emission of air pollution and high fuel consumption.

At present, a total of 2 million 108 thousand 424 light vehicles (including passenger cars, vans and taxis), 121 thousand 853 heavy vehicles (including buses, minibuses, trucks, vans and tractors) and 9 million There is a worn motorcycle device.

Despite the widespread negative consequences of a worn-out vehicle fleet, including air pollution, high fuel consumption, safety, and low standards, unfortunately many vehicles are still in use after the age of wear and tear.

However, due to the consumption pattern in corona conditions, the type of technology and the number of cars traveling in the city is effective in air pollution in metropolitan areas, especially in Tehran. It is not possible to dilute to a large extent as normal under normal conditions, and this causes the current state of contamination. Cars that deliver standard fuel but double air pollution.