4. Conclusions
The present study was an attempt to establish the possibilities
to obtain black rice husk ash (BRHA) and white rice husks ash
(WRHA) via pyrolysis of raw rice husks in a pilot plant fluidizedbed
reactor at different conditions. The products obtained were
used as an adsorbent for purification of crude oil and diesel fuel
from water surfaces and for cleaning of bilge water. The results
showed that BRHA has high adsorption capacity and low cost and
may successfully be used as an effective sorbent for purification of
crude oil or oil products spilled in water basins or bilge water. The
saturated BRHA with crude oil, diesel fuel or different hydrocarbons
are characterized with high calorific value and they can be
burnt in incinerators, industrial ovens or steam generators. By this
way we attain not only ecological but also economical effect.