Neco jsem k tomu nasel
http://www.ipcc.ch/ipccreports/sres/aviation/index.php?idp=35
3.2.3.2 Metal Particles
Aircraft jet engines also directly emit metal particles. Their sources include engine erosion and the combustion of fuel containing trace metal impurities or metal particles that enter the exhaust with the fuel (Chapter 7). Metal particles-comprising elements such as Al, Ti, Cr, Fe, Ni, and Ba-are estimated to be present at the parts per billion by volume (ppbv) level at nozzle exit planes (CIAP, 1975; Fordyce and Sheibley, 1975). The corresponding concentrations of 107 to 108 particles/kg fuel (assuming 1-mm radius; see below) are much smaller than for soot. Although metals have been found as residuals in cirrus and contrail ice particles (Chen et al., 1998; Petzold et al., 1998; Twohy and Gandrud, 1998), their number and
associated mass are considered too small to affect the formation or properties of more abundant volatile and soot plume aerosol particles.
http://www.tanker-enemy.com/PDF/U.Lohmann-Jet-Fuel-Study.pdf
"The detected metallic compounds were all internally mixed with the soot particles. The most abundant metals in the exhaust were Cr, Fe, Mo, Na, Ca and Al; V, Ba, Co, Cu, Ni, Pb, Mg, Mn, Si, Ti and Zr were also detected. "
ABUNDANT: Chromium, Iron, Molybdenum, Sodium, Calcium, and Aluminum. ALSO DETECTED: Vanadium, Barium, Cobalt, Copper, Nickel, Lead, Magnesium, Manganese, Silicon, Titanium, and Zirconium.
"Considering that some fraction of soot can effectively act as INP (Cozic et al., 2008) and that a dominant fraction of ice residuals in cirrus clouds contain metal compounds (Agrawal et al., 2008) the presented findings support the assumption that aircraft engine emissions can act as INP"
// novejsi studie tedy odhadovane mnozstvi zbytkoveho odpadu davaji za moznou pricinu vytvareni castic ledu, tedy mraku resp. dele tvrvajiciho contrailu? nicmene tu se imho jasne mluvi o tom, ze kovove primesy paliva spolu s jinym bordelem necistot jsou soucasti znecisteni, ktere primo vyletava pak do okolniho prostoru
A related
https://phys.org/news/2011-04-nanoparticles-biofuel.html
... cautions that nanoparticles "should be used judiciously," because they tend to "entrain into human bodies."
https://www.scribd.com/document/258816867/Shuttle-Launch-Acid-Rain
Each time a space shuttle is launched, the solid rocket boosters release 240 tons of HCl gas, 26 tons of chlorine gas, 7 tons of nitrogen dioxide gas, and 304 tons of aluminum oxide into the atmosphere. The resulting hydrochloric acid dissolves eight inches of concrete on the launch pad, raises the concentration of hydrochloric acid in nearby lakes to 3 M, produces massive fish kills in the ocean, and destroys the paint on cars. Leading chemists believe that the HCl is a major contributor to the holes in the ozone layer.