INVESTIGATIONS ON CARCINOGENIC BURDEN BY AIR-POLLUTION IN MAN .16. FORMATION OF COMBINED CARBON-BLACK AND BENZO(A)PYRENE AEROSOL

  • 1 January 1977
    • journal article
    • research article
    • Vol. 165  (2) , 139-173
Abstract
Two methods for the preparation of carbon black aerosols were investigated: incomplete combustion of acetylene, acetylene + benzene and other hydrocarbons as well as resublimation of amorphous C. The 1st mentod was developed for generating soot aerosols in animal experiments, but the latter method needs more investigation. Using radioactive acetylene and benzene the produced soot aerosol could be labeled by 14C. Benzo(a)pyrene aerosol was prepared by vapor condensation and was also radioactively labeled. With a combination of both generators, a combined carbon black and benzo(a)pyrene aerosol was prepared. The benzo(a)pyrene amounts bound to the soot were in the range of 1-50 .mu.g/mg soot. Experiments dealing with adsorption and desorbtion of benzo(a)pyrene on soot in the gas phase showed benzo(a)pyrene is relatively tightly adsorbed and cannot be easily or completely desorbed.