Results 31 to 40 of about 5,409,070 (357)

Determination of thoracic and inhalable fraction of sulfuric acid(VI) in workplace air

Medycyna Pracy, 2016
Background: The article presents the results of the determination of the inhalable and thoracic fraction of sulfuric acid(VI) in 3 workplaces producing or processing this chemical.
Małgorzata Szewczyńska, Małgorzata Pośniak, Emilia Pągowska   +2 more
doaj   +1 more source

Sulfuric acid and OH concentrations in a boreal forest site [PDF]

Atmospheric Chemistry and Physics, 2009
As demonstrated in a number of investigations, gaseous sulfuric acid plays a central role in atmospheric aerosol formation. Using chemical ionization mass spectrometer the gas-phase sulfuric acid and OH concentration were measured in Hyytiälä, SMEAR II ...
T. Petäjä, R. L. Mauldin, III, E. Kosciuch, J. McGrath, T. Nieminen, P. Paasonen, M. Boy, A. Adamov, T. Kotiaho, M. Kulmala   +9 more
doaj   +1 more source

Enhanced growth rate of atmospheric particles from sulfuric acid

Atmospheric Chemistry and Physics, 2019
. In the present-day atmosphere, sulfuric acid is the most important vapour for aerosol particle formation and initial growth. However, the growth rates of nanoparticles (
D. Stolzenburg, M. Simon, A. Ranjithkumar, A. Kürten, K. Lehtipalo, H. Gordon, S. Ehrhart, Henning Finkenzeller, L. Pichelstorfer, T. Nieminen, Xucheng He, S. Brilke, M. Xiao, A. Amorim, R. Baalbaki, A. Baccarini, L. Beck, Steffen Bräkling, Lucía Caudillo Murillo, Dexian Chen, Biwu Chu, L. Dada, A. Dias, J. Dommen, J. Duplissy, Imad El Haddad, L. Fischer, Loïc Gonzalez Carracedo, M. Heinritzi, Changhyuk Kim, T. Koenig, Weimeng Kong, Houssni Lamkaddam, C. P. Lee, M. Leiminger, Zijun Li, V. Makhmutov, H. Manninen, Guillaume Marie, R. Marten, Tatjana Müller, W. Nie, Eva Partoll, T. Petäjä, Joschka Pfeifer, M. Philippov, M. Rissanen, B. Rörup, S. Schobesberger, S. Schuchmann, Jiali Shen, M. Sipilä, G. Steiner, Y. Stozhkov, C. Tauber, Y. J. Tham, A. Tomé, Miguel Vazquez-Pufleau, A. Wagner, Mingyi Wang, Yonghong Wang, Stefan K. Weber, D. Wimmer, P. J. Wlasits, Yusheng Wu, Q. Ye, Marcel Zauner-Wieczorek, U. Baltensperger, K. Carslaw, J. Curtius, N. Donahue, R. Flagan, A. Hansel, M. Kulmala, J. Lelieveld, R. Volkamer, J. Kirkby, P. Winkler   +77 more
semanticscholar   +1 more source

Accidents with sulfuric acid [PDF]

Hemijska Industrija, 2006
Sulfuric acid is an important industrial and strategic raw material, the production of which is developing on all continents, in many factories in the world and with an annual production of over 160 million tons.
Rajković Miloš B.
doaj   +1 more source

A proxy for atmospheric daytime gaseous sulfuric acid concentration in urban Beijing

Atmospheric Chemistry and Physics, 2019
. Gaseous sulfuric acid (H2SO4) is known as one of the key precursors for atmospheric new particle formation (NPF) processes, but its measurement remains challenging.
Yiqun Lu, Chao Yan, Yueyun Fu, Yan Chen, Yiliang Liu, Gan Yang, Yuwei Wang, Federico Bianchi, Biwu Chu, Ying Zhou, Rujing Yin, Rima Baalbaki, O. Garmash, C. Deng, Weigang Wang, Yongchun Liu, T. Petäjä, V. Kerminen, Jingkun Jiang, M. Kulmala, Lin Wang   +20 more
semanticscholar   +1 more source

Effect of process variables on oxidative pressurized acid leaching of copper electrorefining anode slimes

E3S Web of Conferences, 2016
Extraction of Cu, Ni, As and Te from copper electrorefining anode slimes was studied. Such parameters as sulfuric acid concentration, temperature and oxygen partial pressure had a positive effect on the oxidative pressurized acid leaching in the ...
Seisko Sipi, Aromaa Jari, Latostenmaa Petri, Forsen Olof, Lundstrom Mari   +4 more
doaj   +1 more source

The process of decomposition of tricalcium phosphate by phosphoric acid with partial replacement of P2O5 to sulfuric acid [PDF]

E3S Web of Conferences
The article covers the decomposition of tricalcium phosphate with thermal phosphoric acid with a concentration of 20, 30 and 40% P2O5 with the replacement of 10, 20 and 30% P2O5 with sulfuric acid and it has been established that, regardless of the ...
Arislanov Akmaljon, Shamshidinov Israiljon, Usmanov Ilkham, Normatov Gayrat, Isomiddinov Oybek   +4 more
doaj   +1 more source

Sulfuric acid baking and leaching of spent sulfuric acid catalyst [PDF]

Periodica Polytechnica Chemical Engineering, 2011
Vanadium, iron and aluminum were recovered from the spent sulfuric acid catalyst with efficiency of 98%, 95% and 85%, respectively by using low temperature sulphuric acid baking followed by leaching. The optimum baking conditions were four grams of concentrated sulfuric acid per ten grams of spent catalyst at 300 ^\circ C for two hours.
Abdulrahman Wahoud, Adel Alouche, Mohamedalkhaled Abdulbake   +2 more
openaire   +2 more sources

Multicomponent new particle formation from sulfuric acid, ammonia, and biogenic vapors

Science Advances, 2018
Atmospheric aerosol formation from biogenic vapors is strongly affected by air pollutants, like NOx, SO2, and NH3. A major fraction of atmospheric aerosol particles, which affect both air quality and climate, form from gaseous precursors in the ...
K. Lehtipalo, Chao Yan, L. Dada, Federico Bianchi, M. Xiao, R. Wagner, D. Stolzenburg, L. Ahonen, A. Amorim, A. Baccarini, P. Bauer, B. Baumgartner, A. Bergen, Anne-Kathrin Bernhammer, M. Breitenlechner, S. Brilke, A. Buchholz, S. Mazon, Dexian Chen, Xuemeng Chen, A. Dias, J. Dommen, D. Draper, J. Duplissy, M. Ehn, Henning Finkenzeller, L. Fischer, C. Frege, C. Fuchs, O. Garmash, H. Gordon, J. Hakala, Xucheng He, L. Heikkinen, M. Heinritzi, Johanna Helm, V. Hofbauer, C. Hoyle, T. Jokinen, J. Kangasluoma, V. Kerminen, Changhyuk Kim, J. Kirkby, J. Kontkanen, A. Kürten, M. Lawler, H. Mai, S. Mathot, R. Mauldin, U. Molteni, L. Nichman, W. Nie, T. Nieminen, A. Ojdanic, A. Onnela, M. Passananti, T. Petäjä, F. Piel, V. Pospisilova, L. Quéléver, M. Rissanen, C. Rose, N. Sarnela, S. Schallhart, S. Schuchmann, K. Sengupta, M. Simon, M. Sipilä, C. Tauber, A. Tomé, J. Tröstl, O. Väisänen, A. Vogel, R. Volkamer, A. Wagner, Mingyi Wang, L. Weitz, D. Wimmer, P. Ye, A. Ylisirniö, Q. Zha, K. Carslaw, J. Curtius, N. Donahue, R. Flagan, A. Hansel, I. Riipinen, A. Virtanen, P. Winkler, U. Baltensperger, M. Kulmala, D. Worsnop   +91 more
semanticscholar   +1 more source

Kinetics of Chalcopyrite Leaching by Hydrogen Peroxide in Sulfuric Acid

Metals, 2019
In ores, chalcopyrite is usually associated with other sulfide minerals, such as sphalerite, galena, and pyrite, in a dispersed form, with complex mineralogical structures.
M. Sokić, B. Marković, A. Stanković, Ž. Kamberović, N. Strbac, V. Manojlović, N. Petronijević   +6 more
semanticscholar   +1 more source