Survey and measure the environmental pollutants emitted from exhaust of commercial vehicles in an industrial unit

1. According to the studies report about the rates of diseases in the world in 2015, air pollution is responsible for 1.5 million deaths in China and 4.2 million people around the world. Despite statistics that compare the amount of Tehran’s pollutants with international standards, the claim is not far from reality that the air pollution is the main environmental problem in Tehran. Millions of people breathed in the most polluted air of Tehran throughout the day and if the growth of pollution sources continued to produce, so this issue can become a humanitarian disaster. The result of fuel consumption in various sectors is to produce the particles and gases that constant exposure against them involves problems and dangerous complications for human health and other living things and this is only part of the adverse effects of air pollution.
2. AIRREX device, Model HG-550 or analyzer of pollutants for the vehicles made of Korea that is one of standard devices by capability to measure the output gases from exhaust of vehicles; is used in the study to measure the pollutants emitted from exhaust of commercial vehicles in an industrial unit. The analyzer displays also the air ratio to fuel and excess air ratio. The instruction for usage the device is that probe of device puts inside the exhaust of vehicle, the device is turned on and after warming, it starts to analyze the output gas. The amount of pollution of output materials is determined based on standards developed by Iranians national standards organization to number ISIR 9181 and standard set by the environmental protection agency under standard of pollution limit for all vehicles according to the standard table of pollution limit for domestic and imported vehicles as follows.
3. As it has been shown, the major emitted pollutants include carbon monoxide and unburned hydrocarbons that have adverse effects to the air pollution and human health and the environment. Most of these gases are emitted from exhaust because of technical fault of vehicles; and the first step to reduce the production of pollutant gases is their timely service and adjustment because the results of most researches reveal the importance of motor adjustment and circular services of vehicles for reduction of amount of air pollution. One of other tools and techniques to reduce the pollutants in the exhaust of vehicles is the use of catalytic converters on the route of vehicles’ exhaust. Catalyst converter is a device that installs in the engine exhaust system and then converts three harmful exhaust compounds from engine (hydrocarbons, carbon monoxide and nitrogen oxides) into harmless compounds by the catalyzers.