Document Type : Research article
Authors
1 Lecturer of Enviromental Pollution, Kheradgarayan Motahar Institute of Higher Education,Iran, mashhad.
2 MSc graduate of Enviromental Pollution, Kheradgarayan Motahar Institute of Higher Education , Mashhad City, Iran ,mashhad .
3 Assistant Professor of Environment Department, Kheradgarayan Motahar Institute of Higher Education, Mashhad City, Iran
Abstract
Background and Purpose: 80% of air pollution in urban areas comes from
heavy vehicles. The purpose of this study is to investigate the amount of CO2,
CO, HC, NOX pollutants, types of diesel cars and their relationship with the life
of the car.
Materials and Methods: In this study, out of all diesel cars in Mashhad, which
is 5861 cars, 425 cars were randomly selected and after recording the year of
car production, using OPTIMA7 NDIR five-gas pollutant device in bright engine
mode (Engine operation). Sampling was performed continuously (except for
the first to the fourth of April) in the period of December 6, 2017 to May 9,
2017 at nine to twelve and fifteen to twenty o’clock and Then, using SPSS
software and statistical tests. The relationship between these pollutants and
vehicle life was investigated.
Results: According to the amount of sig (p=0/531>0/05) between the life of the
car and carbon monoxide, the amount of sig (p=0/571>0/05) between the life
of the car and the amount of hydrocarbon, the amount of sig (p=0/153>0/05)
between the life of the car and carbon dioxide output and the amount of
p=0/290>0/05 (sig) there is no significant relationship between car life and
nitrogen oxides.
There is an inverse correlation between the car’s year of manufacture and
CO2 and NOX pollutants, So that the higher the car’s year of manufacture,
the lower the amount of carbon dioxide and nitrogen oxides. And there is a
positive correlation between HC and CO pollutants.
Conclusion: The significant level value (sig) between car life and all pollutants
is greater than 0.05, so there is no statistically significant relationship between
car life and all exhaust gas pollution. Therefore, the amount of air pollution by
diesel cars should be reduced by taking correct management methods.
Keywords
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