title

یک مدل ریاضیاتی برای پیش بینی تغییرات غلظت 24 ساعته BTEX در هوای شهر تهران

فضل زاده دویل, مهدی and ندافی, کاظم and رستمی, روح اله and زارعی, احمد and فیضی زاده دویل, مژگان (1391) یک مدل ریاضیاتی برای پیش بینی تغییرات غلظت 24 ساعته BTEX در هوای شهر تهران. International Journal of Environmental Health Engineering ــ 2 (1). pp. 1-6. شاپا 2277-9183

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Official URL: http://ijehe.org/article.asp?issn=2277-9183;year=2...


Title

A mathematical model for predicting 24-hr variations of BTEX concentrations in ambient air of Tehran

English Abstract

Aims: In this study, the temporal variations of Benzene, Toluene, Ethyl benzene and Xylene (BTEX) in the atmosphere of Tehran city was investigated. Materials and Methods: Two air quality monitoring stations, Aghdasieh and Ray, in different locations of the city were selected. Sampling was carried out hourly from Nov 23, 2007 to Dec 22, 2007 in Aghdasieh air monitoring station and from Dec 10, 2007 to Jan 9, 2008, in Ray’s air monitoring station by an online BTEX monitoring system. The correlations, repeated measures variance and regressions tests were used for statistical analysis. Results: Results indicated that, concentrations of these compounds were sometimes higher than standard limits and were significantly different in selected stations. However, an approximately similar increasing and decreasing trend was seen among them. In most cases, equations for concentration variations were sinusoidal or fourth‑order. Conclusion: According to the results, sinusoidal and fourth‑order are most suitable equations for BTEX concentration variations in the ambient air of the city, and the trends of variations are similar in different places of the city.

Item Type:Article
زبان سند : انگلیسی
نویسنده اول :مهدی فضل زاده دویل
نویسنده مسئول :روح اله رستمی
Additional Information:indexed in: EBSCO Publishing's Electronic Databases, Expanded Academic ASAP, Genamics JournalSeek, Google Scholar, Hinari, Index Copernicus, OpenJGate, PrimoCentral, ProQuest, SCOLOAR, SIIC databases, Summon by Serial Solutions, Ulrich's International Periodical Directory
کلیدواژه ها (انگلیسی):Air pollution, air quality modeling, ambient air, BTEX, concentration variations, tehran, VOCs
Subjects:WA Public Health > WA 30 Social, Economic, and Environmental factor in public health
WA Public Health > WA 30 Social, Economic, and Environmental factor in public health
Divisions:Faculty of Health > Department of Environmental health
ID Code:4058
Deposited By: Engineerin Mahdi Fazlzadeh
Deposited On:12 Dec 1391 11:08
Last Modified:19 Jan 1392 08:10

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