Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
Permanent URI for this collectionhttps://hdl.handle.net/11147/7148
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Book Part Fragrance Emissions Into the Air and Their Impact on Air Quality and Human Health(Springer Science and Business Media Deutschland GmbH, 2024) Balci,E.; Sofuoglu,A.Fragrances have been widely used in consumer products around the world, leading to their release into environmental compartments. Due to their volatility, fractions of fragrances in the air are subjected to volatilization, photolysis, and reaction with oxidation agents (O3, OH, Cl, and NO3 radicals), and can also be removed from the atmosphere via dry and wet deposition. Their vast distribution and presence in the air cause adverse effects on air quality, a crucial parameter that affects people and environmental health worldwide. Fragrances and their reaction products can enter the human body through inhalation, dermal contact, and ingestion and may pose a health threat. Recently, there has been rising concern over these chemicals’ negative effects. To address the questions about fragrances, this chapter provides systematic information on the occurrence and potential sources of fragrances, their fate in the air, and their effects on health, focusing on air chemistry. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2023.Article Evaluation of the Effects of Covid-19 Lockdowns and Strict Restrictions on İstanbul's Air Quality(İstanbul Teknik Üniversitesi, 2023) Köse, ŞühedaThe Covid-19 pandemic, which started in Wuhan, China, led to several strict restrictions and lockdowns in Turkey, like many other countries. Although lockdowns have had a socially and economically negative impact, they have affected the air quality in a positive way. The aim of this study is to examine the spatial impact of lockdowns on air quality in İstanbul and to determine the correlation of polluting indicators. In line with the determined purpose, PM10, SO2, NO2, CO and NOx parameters were spatialized with ordinary kriging method in 5 different time intervals and the relativity levels between meteorology, transportation and particles that cause pollution were examined with the Pearson correlation method. As a result, lockdowns caused an increase on CO and SO2 by up to 28%, while other particles decreased by 2% to 23%. Compared to 2019, a decrease of up to 60% in all particles except CO and SO2 has shown that lockdowns have a positive effect on air quality. It was observed that the pollution, which was concentrated in urban areas before the pandemic, spread to rural areas with the precautions taken. Temperature, number of vehicles and traffic index were found to play an important role in the emission of particles, while wind speed and direction played an important role in the displacement of pollution. It has been observed that finding a positive correlation between pollutants and the factors that trigger pollution has rapidly changed the ecosystem of the city along with the policies affecting air quality. © 2023, Istanbul Teknik Universitesi, Faculty of Architecture. All rights reserved.