Results 21 to 30 of about 12,003 (311)

Source apportionment resolved by time of day for improved deconvolution of primary source contributions to air pollution [PDF]

Atmospheric Measurement Techniques, 2022
Present methodologies for source apportionment assume fixed source profiles. Since meteorology and human activity patterns change seasonally and diurnally, application of source apportionment techniques to shorter rather than longer time periods ...
S. Bhandari, S. Bhandari, Z. Arub, G. Habib, J. S. Apte, J. S. Apte, L. Hildebrandt Ruiz   +6 more
doaj   +1 more source

PM source apportionment and health effects: 1. Intercomparison of source apportionment results [PDF]

Journal of Exposure Science & Environmental Epidemiology, 2005
During the past three decades, receptor models have been used to identify and apportion ambient concentrations to sources. A number of groups are employing these methods to provide input into air quality management planning. A workshop has explored the use of resolved source contributions in health effects models.
Philip K, Hopke, Kazuhiko, Ito, Therese, Mar, William F, Christensen, Delbert J, Eatough, Ronald C, Henry, Eugene, Kim, Francine, Laden, Ramona, Lall, Timothy V, Larson, Hao, Liu, Lucas, Neas, Joseph, Pinto, Matthias, Stölzel, Helen, Suh, Pentti, Paatero, George D, Thurston   +16 more
openaire   +2 more sources

Voltage Optimization of Multiple Reflection Time of Flight Mass Analyzer Based on Particle Swarm Optimization Algorithm [PDF]

Zhipu Xuebao, 2023
Time-of-flight mass spectrometry is a commonly mass spectrometry technique that is widely used in biomedicine, environmental science and food science. The multiple reflection time-of-flight (MR-TOF) mass analyzer is a new type of mass analyzer with ultra-
HUANG Qi;REN Yi;CHEN Zheng-ge;CHEN Jian-song;HONG Yi;LIANG Xin;LI Mei;HUANG Zheng-xu;ZHOU Zhen
doaj   +1 more source

Source Apportionment with Site Specific Source Profiles [PDF]

Journal of the Air & Waste Management Association, 1991
A receptor modeling study was performed to identify and apportion the sources of PM10 mass in Granite City, Illinois, an area of historic TSP nonattainment. Samples of the ambient aerosol were collected using a dichotomous sampler. Each sample was analyzed by x-ray fluorescence and instrumental neutron activation analysis.
D M, Glover, P K, Hopke, S J, Vermette, S, Landsberger, D R, D'Auben   +4 more
openaire   +2 more sources

Mixing state of oxalic acid containing particles in the rural area of Pearl River Delta, China: implications for the formation mechanism of oxalic acid [PDF]

Atmospheric Chemistry and Physics, 2017
The formation of oxalic acid and its mixing state in atmospheric particulate matter (PM) were studied using a single-particle aerosol mass spectrometer (SPAMS) in the summer and winter of 2014 in Heshan, a supersite in the rural area of the Pearl ...
C. Cheng, C. Cheng, M. Li, M. Li, C. K. Chan, H. Tong, C. Chen, D. Chen, D. Wu, D. Wu, L. Li, L. Li, C. Wu, C. Wu, P. Cheng, P. Cheng, W. Gao, W. Gao, Z. Huang, Z. Huang, X. Li, X. Li, Z. Zhang, Z. Zhang, Z. Fu, Y. Bi, Z. Zhou, Z. Zhou   +27 more
doaj   +1 more source

Mechanistic insights into the generation and control of Cl-DBPs during wastewater sludge chlorination disinfection process

Environment International, 2022
Chlorination disinfection has been widely used to kill the pathogenic microorganisms in wastewater sludge during the special Covid-19 period, but sludge chlorination might cause the generation of harmful disinfection byproducts (DBPs).
Weijun Zhang, Tianyi Dong, Jing Ai, Qinglong Fu, Nan Zhang, Hang He, Qilin Wang, Dongsheng Wang   +7 more
doaj   +1 more source

Iodine source apportionment in the Malawian diet [PDF]

Scientific Reports, 2015
AbstractThe aim of this study was to characterise nutritional-I status in Malawi. Dietary-I intakes were assessed using new datasets of crop, fish, salt and water-I concentrations, while I status was assessed for 60 women living on each of calcareous and non-calcareous soils as defined by urinary iodine concentration (UIC).
Michael J. Watts, Edward J. M. Joy, Scott D. Young, Martin R. Broadley, A. D. Chilimba, Rosalind S. Gibson, Edwin W. P. Siyame, Alexander Kalimbira, Ben Chilima, E. Louise Ander   +9 more
openaire   +3 more sources

Characteristics and mixing state of amine-containing particles at a rural site in the Pearl River Delta, China [PDF]

Atmospheric Chemistry and Physics, 2018
Particulate amines play an important role for the particle acidity and hygroscopicity and also contribute to secondary organic aerosol mass. We investigated the sources and mixing states of particulate amines using a single-particle aerosol mass ...
C. Cheng, C. Cheng, Z. Huang, C. K. Chan, Y. Chu, M. Li, M. Li, T. Zhang, Y. Ou, D. Chen, P. Cheng, P. Cheng, L. Li, L. Li, W. Gao, W. Gao, Z. Huang, Z. Huang, B. Huang, B. Huang, B. Huang, Z. Fu, Z. Zhou, Z. Zhou   +23 more
doaj   +1 more source

Chemical Composition and Source of PM_2.5 during Winter Heating Period in Guanzhong Basin

Atmosphere, 2023
An intensive field campaign was carried out from December 2022 to March 2023 at six different sites across five major cities (Xi’an, Baoji, Xianyang, Weinan, and Hancheng) in the Guanzhong Basin, China, covering most of the heating period there, which is
Lei Cao, Yanan Tao, Hao Zheng, Mei Wang, Shiying Li, Yongjiang Xu, Mei Li   +6 more
doaj   +1 more source

Sensitivity of source apportionment results to mobile source profiles [PDF]

Environmental Pollution, 2016
The sensitivity of a source apportionment model to mobile source profiles was examined to determine the impact of using non-local mobile source profiles in chemical mass balance (CMB) models. We examined the impact of USA and Chinese mobile source profiles on source apportionment results in St. Louis, Missouri, and Beijing.
Tianqi Cai, James J. Schauer, Wei Huang, Dongqing Fang, Jing Shang, Yuqin Wang, Yuanxun Zhang   +6 more
openaire   +2 more sources