When removal percentages of the metal ions [Cu.sup.2+] and [Zn.sup.2+] are compared, the mean removal efficiency rates by the biosorbent and by activated coal were 39.71 and 40.30% and 88.35 and 82.70% respectively.
Activated coals for purification of culture liquid was preliminarily milled and subdivided into fractions by sieving for obtaining of granules with the particle sizes from 100 to 280 [micro]m.
The materials processing section describes chemically deposited beryllium iodide thin films, catalytic dehydrogenation of n-butane over activated coal, rubber seed oil-based polyurethane composites, and the physical properties of Nigerian clays.