scholarly journals Impact of surface ozone interactions on indoor air chemistry: A modeling study

Indoor Air ◽  
2017 ◽  
Vol 27 (5) ◽  
pp. 1001-1011 ◽  
Author(s):  
M. Kruza ◽  
A. C. Lewis ◽  
G. C. Morrison ◽  
N. Carslaw
Keyword(s):  
Indoor Air ◽  
Surface Ozone ◽  
Air Chemistry ◽  
Modeling Study

A modeling study of the regional representativeness of surface ozone variation at the WMO/GAW background stations in China

2020 ◽  
Vol 242 ◽  
pp. 117672
Author(s):  
Ningwei Liu ◽  
Jianzhong Ma ◽  
Wanyun Xu ◽  
Yuhang Wang ◽  
Andrea Pozzer ◽  
...  
Keyword(s):  
Surface Ozone ◽  
Ozone Variation ◽  
Regional Representativeness ◽  
Modeling Study

scholarly journals Nonlinear response of ozone to precursor emission changes in China: a modeling study using response surface methodology

2011 ◽  
Vol 11 (10) ◽  
pp. 5027-5044 ◽  
Author(s):  
J. Xing ◽  
S. X. Wang ◽  
C. Jang ◽  
Y. Zhu ◽  
J. M. Hao
Keyword(s):  
Response Surface Methodology ◽  
Air Quality ◽  
Response Surface ◽  
Surface Ozone ◽  
Emission Control ◽  
Nox Emission ◽  
Ozone Sensitivity ◽  
Nox Control ◽  
Ozone Levels ◽  
Modeling Study

Abstract. Statistical response surface methodology (RSM) is successfully applied for a Community Multi-scale Air Quality model (CMAQ) analysis of ozone sensitivity studies. Prediction performance has been demonstrated through cross validation, out-of-sample validation and isopleth validation. Sample methods and key parameters, including the maximum numbers of variables involved in statistical interpolation and training samples have been tested and selected through computational experiments. Overall impacts from individual source categories which include local/regional NOx and VOC emission sources and NOx emissions from power plants for three megacities – Beijing, Shanghai and Guangzhou – were evaluated using an RSM analysis of a July 2005 modeling study. NOx control appears to be beneficial for ozone reduction in the downwind areas which usually experience high ozone levels, and NOx control is likely to be more effective than anthropogenic VOC control during periods of heavy photochemical pollution. Regional NOx source categories are strong contributors to surface ozone mixing ratios in three megacities. Local NOx emission control without regional involvement may raise the risk of increasing urban ozone levels due to the VOC-limited conditions. However, local NOx control provides considerable reduction of ozone in upper layers (up to 1 km where the ozone chemistry is NOx-limited) and helps improve regional air quality in downwind areas. Stricter NOx emission control has a substantial effect on ozone reduction because of the shift from VOC-limited to NOx-limited chemistry. Therefore, NOx emission control should be significantly enhanced to reduce ozone pollution in China.

Indoor Air Chemistry: Formation of Organic Acids and Aldehydes

1994 ◽  
Vol 28 (11) ◽  
pp. 1975-1982 ◽  
Author(s):  
Junfeng. Zhang ◽  
William E. Wilson ◽  
Paul J. Lioy
Keyword(s):  
Organic Acids ◽  
Indoor Air ◽  
Air Chemistry

New Directions: Where is the link between reactive indoor air chemistry and health effects?

2009 ◽  
Vol 43 (24) ◽  
pp. 3808-3809 ◽  
Author(s):  
Nicola Carslaw ◽  
Sarka Langer ◽  
Peder Wolkoff
Keyword(s):  
Health Effects ◽  
Indoor Air ◽  
New Directions ◽  
Air Chemistry

scholarly journals Investigation on air quality of specific indoor environments—spa salons located in Gdynia, Poland

2020 ◽  
Author(s):  
Klaudia Pytel ◽  
Renata Marcinkowska ◽  
Bożena Zabiegała
Keyword(s):  
Chemical Composition ◽  
Essential Oils ◽  
Indoor Air ◽  
Well Being ◽  
Elevated Concentration ◽  
Indoor Environments ◽  
Flame Ionization ◽  
Before And After ◽  
Air Chemistry ◽  
Total Volatile Organic Compounds

Abstract Due to excessive application of essential oils and scented products in spa salons during aromatherapy and massage sessions, the elevated concentration of total volatile organic compounds (TVOCs), particularly terpenes, which are known as secondary organic aerosol (SOA) precursors, is expected there. This study was aimed at determination of VOCs with a particular regard to terpenes in air samples collected in selected spa salons located in Northern Poland. Active air sampling was conducted before and after treatments. Samples were analyzed with the use of thermal desorption gas chromatography coupled with flame-ionization detector (TD-GC-FID) and mass spectrometer (TD-GC-MS). Obtained results allowed to characterize chemical composition of indoor air of spa salons and also to relate the dependence between applied essential oil and indoor air chemical composition. It has been proved that (i) spa salons are characterized by TVOC concentrations exceeding recommended values of 300–400 μg m−3 in most of examined cases, reaching up to several thousand of micrograms per cubic meter, (ii) TVOC concentration is strictly related to salon characteristics and carried out treatments, (iii) terpenes constitute a significant part of TVOCs present in spa indoor air, from 22 up to 86%, (iv) most commonly investigated terpenes in the literature (d-limonene, α-pinene, camphene, and linalool) were also determined at the highest concentration levels in this study and (v) VOC chemical composition is strictly dependent on the type of applied essential oils. On the basis of obtained results, it may be stated that extensive application of essential oils rich in terpenes can significantly alter indoor air chemistry of spa salons, thereby influencing health and well-being of employees working there.

scholarly journals How do breath and skin emissions impact indoor air chemistry?

Indoor Air ◽  
2019 ◽  
Vol 29 (3) ◽  
pp. 369-379 ◽  
Author(s):  
Magdalena Kruza ◽  
Nicola Carslaw
Keyword(s):  
Indoor Air ◽  
Air Chemistry
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