Reducing entrainment in ultrafine particle flotation by selective flocculation of gangue material

2020 ◽  
Vol 92 (9) ◽  
pp. 1322-1322
Author(s):  
J. Sygusch ◽  
M. Rudolph
Keyword(s):  
Ultrafine Particle ◽  
Selective Flocculation

scholarly journals Impact on Ultrafine Particles Concentration and Turbulent Fluxes of SARS-CoV-2 Lockdown in a Suburban Area in Italy

Atmosphere ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 407
Author(s):  
Antonio Donateo ◽  
Adelaide Dinoi ◽  
Gianluca Pappaccogli
Keyword(s):  
Ultrafine Particles ◽  
Particle Number ◽  
Ultrafine Particle ◽  
Turbulent Fluxes ◽  
Number Concentration ◽  
Suburban Area ◽  
Observation Site ◽  
Meteorological Forcing ◽  
Restrictive Measures ◽  
Measurement Area

In order to slow the spread of SARS-CoV-2, governments have implemented several restrictive measures (lockdown, stay-in-place, and quarantine policies). These provisions have drastically changed the routines of residents, altering environmental conditions in the affected areas. In this context, our work analyzes the effects of the reduced emissions during the COVID-19 period on the ultrafine particles number concentration and their turbulent fluxes in a suburban area. COVID-19 restrictions did not significantly reduce anthropogenic related PM10 and PM2.5 levels, with an equal decrement of about 14%. The ultrafine particle number concentration during the lockdown period decreased by 64% in our measurement area, essentially due to the lower traffic activity. The effect of the restriction measures and the reduction of vehicles traffic was predominant in reducing concentration rather than meteorological forcing. During the lockdown in 2020, a decrease of 61% in ultrafine particle positive fluxes can be observed. At the same time, negative fluxes decreased by 59% and our observation site behaved, essentially, as a sink of ultrafine particles. Due to this behavior, we can conclude that the principal particle sources during the lockdown were far away from the measurement site.

Ferroelectrics of Ultrafine Particle Size: I, Synthesis of Titanate Powders of Ultrafine Particle Size

1966 ◽  
Vol 49 (6) ◽  
pp. 291-295 ◽  
Author(s):  
KLARA KISS ◽  
JULES MAGDER ◽  
MARK S. VUKASOVICH ◽  
ROBERT J. LOCKHART
Keyword(s):  
Particle Size ◽  
Ultrafine Particle

Synthesis of functionalized benzenesulphonyl monomers, polymers and copolymers designed for the selective flocculation of aqueous smithsonite dispersions

1992 ◽  
Vol 28 (10) ◽  
pp. 1225-1229 ◽  
Author(s):  
V. Bertini ◽  
M. Pocci ◽  
N. Picci ◽  
A. De Munno ◽  
F. Lucchesini
Keyword(s):  
Selective Flocculation

Characterization of Ultrafine Particle Emissions from a Heavy Duty CNG Engine through Endurance Tests

2017 ◽  
Author(s):  
Vishnu Vijayakumar ◽  
P. Sakthivel ◽  
Bhuvenesh Tyagi ◽  
Amardeep Singh ◽  
Reji Mathai ◽  
...  
Keyword(s):  
Ultrafine Particle ◽  
Heavy Duty ◽  
Particle Emissions ◽  
Endurance Tests ◽  
Cng Engine
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