Levels of particulate matters in air of the Gonabad city, Iran

The pollution of air and its effect on the ecosystem and particularly on human wellbeing is an issue of important public and governmental concern. To understand the levels of particulate matters and compositional data for total particulate matters fractions, samples were collected from October to February 2018. The samples were collected using gravitational dust sampling method. Weekly and monthly variations of particulate matters in studied stations were in range of 0.0262-0.0802 and 0.0243-0.2109 mg/cm².day. The XRD analysis showed that most of particles were inorganic in nature, representing that these particles originates mainly from deserts. However, local and regional and international sources of these particles should be determined. Thus, comprehensive control efforts will be required in addition to local initiatives to improve the air quality in cities like Gonabad.

Evaluation of indoor air quality and its symptoms in office building - A case study of Mashhad, Iran

Air pollution sources in indoor area are one of the main factors for reducing indoor air quality of locations. In the current research, factors affecting indoor air quality and its symptoms are evaluate as case study in an office building in Mashhad (Iran). In order to conduct this descriptive-analytical study, gas pollutants affecting indoor air quality were determined using portable analysis systems. Alberta Indoor Air Quality Toolkit was used in order to study sick building syndrome. Findings indicated that 21% of staffs viewed labor environment conditions as inappropriate and they were mostly compliant about feeling of dusty air, fatigue and headache. In addition, findings showed that O₃, VOC, PM₁₀, PM_2.5, CO, CO₂ parameters, Formaldehyde, temperature, sound and humidity were at standard level. Indicators of indoor air quality, in addition to the stress and depression interference on employee performance and satisfaction were at acceptable level.