Results 1 to 10 of about 12,003 (311)

Direct Electrospray Ionization Mass Spectrometry for Monitoring of Photochemical Oxidation Reaction of Benzaldehyde in Face Mask [PDF]

Zhipu Xuebao
Face masks are usually used to prevent inhalable particles and microdroplets that may enter the nose and mouth. However, a lot of organic contaminants can be found in materials, manufacturing processes, or packaging of face mask, so there is a potential ...
YI Man, DONG Song-bin, HU Bin
doaj   +1 more source

Development and characterization of a high-performance single-particle aerosol mass spectrometer (HP-SPAMS) [PDF]

Atmospheric Measurement Techniques
This study describes a high-performance single-particle mass spectrometry (HP-SPAMS) design in detail. The comprehensive improvements in the injection system, optical sizing system, mass spectrometry, and data acquisition system have improved particle ...
X. Du, X. Du, Q. Xie, Q. Xie, Q. Huang, Q. Huang, X. Li, X. Li, J. Yang, Z. Hou, J. Wang, X. Li, X. Li, Z. Zhou, Z. Zhou, Z. Huang, Z. Huang, W. Gao, W. Gao, L. Li, L. Li   +20 more
doaj   +1 more source

Photochemical grid model implementation and application of VOC, NO_x, and O₃ source apportionment [PDF]

Geoscientific Model Development, 2015
For the purposes of developing optimal emissions control strategies, efficient approaches are needed to identify the major sources or groups of sources that contribute to elevated ozone (O3) concentrations.
R. H. F. Kwok, K. R. Baker, S. L. Napelenok, G. S. Tonnesen   +3 more
doaj   +1 more source

Are contributions of emissions to ozone a matter of scale? [PDF]

Geoscientific Model Development, 2020
Anthropogenic and natural emissions influence the tropospheric ozone budget, thereby affecting air quality and climate. To study the influence of different emission sources on the ozone budget, often source apportionment studies with a tagged tracer ...
M. Mertens, A. Kerkweg, A. Kerkweg, V. Grewe, V. Grewe, P. Jöckel, R. Sausen   +6 more
doaj   +1 more source

Estimation of the share of artificial Po-210 contamination in the ambient air [PDF]

Archives of Environmental Protection, 2021
In this work, source apportionment for unsupported 210Po was conducted. The activity size distributions of both supported and unsupported 210Po in urban aerosols were measured from February to December 2019.
Magdalena Długosz-Lisiecka, Karolina Nowak   +1 more
doaj   +1 more source

Source identification of the elemental fraction of particulate matter using size segregated, highly time-resolved data and an optimized source apportionment approach

Atmospheric Environment: X, 2022
Source emissions with high covariance degrade the performance of multivariate models, and often highly-time resolved data is needed to accurately extract the contribution of different emissions. Here, we use highly time-resolved size segregated elemental
M. Manousakas, M. Furger, K.R. Daellenbach, F. Canonaco, G. Chen, A. Tobler, P. Rai, L. Qi, A.H. Tremper, D. Green, C. Hueglin, J.G. Slowik, I. El Haddad, A.S.H. Prevot   +13 more
doaj   +1 more source

Insights into bulk stable isotope alteration during sediment redistribution to edge-of-field: impact on sediment source apportionment

, 2021
Organic tracers (bulk δ13C and δ15N) are being increasingly used in sediment/particulate organic carbon source apportionment studies at the catchment scale to support sustainable land management decisions.
Micale, M., Collins, A. L., Cilione, L., Upadhayay, H. R., Amorim, F., Granger, S. J., Zhang, Y.   +6 more
core   +1 more source

Source apportionment of mine pollution across streamflows [PDF]

, 2023
Globally, metals released by mine waste represent a challenge for protecting water quality and ecosystems. Understanding metal dispersion in catchments is critical for developing efficient remediation strategies and reducing contamination from mining ...
Hudson-Edwards, KA, Onnis, P, Edwards, P, Stott, TA, Hunt, CO, Frau, I, Byrne, P, Williams, T   +7 more
core   +3 more sources

Seasonal Variation and Source Apportionment of Inorganic and Organic Components in PM2.5: Influence of Organic Markers Application on PMF Source Apportionment [PDF]

Environmental Science and Pollution Research, 2022
Abstract PM2.5 samples collected over a 1-year period in a Chinese megacity were analyzed for organic carbon (OC), elemental carbon (EC), water soluble ions, elements and organic markers such as polycyclic aromatic hydrocarbons (PAHs), hopanes, steranes, and n-alkanes.
Qianqian, Xue, Yingze, Tian, Yang, Wei, Danlin, Song, Fengxia, Huang, Shanshan, Tian, Yinchang, Feng   +6 more
openaire   +2 more sources

Quantifying black carbon light absorption enhancement with a novel statistical approach [PDF]

Atmospheric Chemistry and Physics, 2018
Black carbon (BC) particles in the atmosphere can absorb more light when coated by non-absorbing or weakly absorbing materials during atmospheric aging, due to the lensing effect.
C. Wu, C. Wu, D. Wu, D. Wu, D. Wu, J. Z. Yu, J. Z. Yu, J. Z. Yu   +7 more
doaj   +1 more source