Em. Bulewicz et al., TREATMENT OF CHROMIC TANNERY WASTES USING COAL ASHES FROM FLUIDIZED-BED COMBUSTION OF COAL, Industrial & engineering chemistry research, 36(10), 1997, pp. 4381-4384
A new method of treatment for chromic tannery wastes containing chrome
and large amounts organic substances has been investigated. It has be
en found that the addition of certain types of coal ash from fluid bed
combustion technologies, at a suitable temperature and pH, results in
effective removal of Cr(III) compounds present in the wastes. The was
tes could then be subjected to further processing in conventional biol
ogical treatment units. The method is very simple, cheap, and effectiv
e and could be used for chromic tannery wastes of different compositio
ns.