Volatile organic compounds (VOCs) are ubiquitous atmospheric constituents of both anthropogenic and natural origin. VOCs are important precursors of tropospheric ozone (O3), and can impact air quality and global climate. Most of primary VOCs and their oxidized products makeup a major fraction of secondary pollutants in urbanized regions. Due to fast reaction rates mainly with the hydroxyl radic...

Indoor toxic volatile organic compounds (VOCs) pollution is a serious threat to people’s health and toluene typical representative. In this study, we developed composite photocatalyst of carbon nitride quantum dots (CNQDs) in situ-doped TiO2 inverse opal IO for efficient degradation toluene. The catalyst was fabricated using sol-gel method with colloidal photonic crystals as the template. as-pr...

Abstract. The implementation of strict emission control during the 11th National Minority Games (NMG) in September 2019 provided a valuable opportunity to assess impact such controls on characteristics VOCs and other air pollutants. Here, we investigated O3–NOx–VOC sensitivity comprehensively Zhengzhou before, during, after NMG by delivering field measurements combined with WRF-CMAQ (Weather Re...

The increasing population, urbanization and industrial growth are causing serious environmental challenges including air pollution worldwide. According to WHO, the indoor and outdoor air pollution exposure has caused around 7 million deaths globally only in 2012. The major air pollution sources include transportation and petrochemical based industry. Motor vehicle repair workshops (MVRW) pose m...

To understand the pollution characteristics of volatile organic compounds (VOCs) in glass deep-processing industry, samples were collected using polyvinyl fluoride bags and quickly transferred to summa tanks for GC/MS/FID analysis. The emission VOCs, ozone formation potential secondary aerosol studied. results showed that VOCs emitted by six enterprises mainly aromatics OVOCs, accounting 35% 97...

Abstract. We developed incremental reactivity (IR) scales for 116 volatile organic compounds (VOCs) in a Chinese megacity (Guangzhou) and elucidated their application calculating the ozone (O3) formation potential (OFP) China. Two sets of model inputs (emission-based observation-based) were designed to localize IR Guangzhou using Master Chemical Mechanism (MCM) box also compared with those US. ...

For a proper analysis of the potentially causal relationship between exposure to volatile organic chemicals (VOCs) in drinking water and health events, it is essential to know T1, the time when exposure started, and C = f(T), which is the change of the VOC concentration C as a function of time T and the total accumulated exposure (TAE) to VOCs to which an individual was exposed. In the typical ...

Development of chemical industry and high vapor pressure of volatile organic compounds (VOCs) have been caused that these materials recently be considered as a source of air pollution. These are different methods for separation of VOC from air that absorption by suitable and selective solvent is an efficient method. In this research, mathematical modeling of a packed absorption tower for separa...

The large-scale burning of crop residues in the North China Plain (NCP), one of the most densely populated world regions, was recently recognized to cause severe air pollution and harmful health effects. A reliable quantification of the magnitude of these fires is needed to assess regional air quality. Here, we use an eight-year record (2005-2012) of formaldehyde measurements from space to cons...