Vol.2, No 1, 2001 pp. 69 - 76
UDC 628.47.045
ECO-TECHNOLOGICAL PROCEDURE OF TREATMENT
OF THE SLUDGE GENERATED
IN THE GALVANIC WASTE WATER PURIFICITATION
Miodrag Stanisavljević, Ivan Krstić
Faculty of Occupational Safety, University of Niš, Yugoslavia
Abstract. The subject of the paper is eco-technological procedure
of the treatment of the sludge generated during conventional purification
(CN- oxidation, Cr6+
reduction, chemical precipitation of the other metals) of the waste water
from galvanic process. The detalied analysis of the waste sludge with the
determination of high flow (the water eluate) and low flow (HNO3-eluate)
fraction as Cu2+, Cr3+,
Cd2+, Ni2+,
Pb2+, Zn2+.
The point of the paper is the treatment of the sludge as the dangerous
waste into useful product glass-ceramics, with eliminating of the generation
of the dangerous and harmful materials in environment.
Experimental investigation has achived the point and approved that
with this procedure it is possible to transform chemical active maters
(Cu2+, Cr3+,
Cd2+, Ni2+,
Pb2+, Zn2+)
using the phase and chemical transformation into very stable structure
where the polutants can not be activated even under critical conditions
as high temperature, influence of acids and alkalies, etc.
Key words: waste sludge, eco-technological procedure,
glass-ceramics
EKO-TEHNOLOŠKI POSTUPAK PRERADE MULJA
NASTALOG PREČIŠĆAVANJEM GALVANSKIH OTPADNIH VODA
Predmet rada je eko-tehnološki postupak prerade mulja nastalog konvencionalnim
prečišća-vanjem (oksidacijom CN-, redukcijom
Cr6+, hemijskom precipitacijom ostalih
metala) otpadnih voda procesa galvanizacije. U radu je detaljno analiziran
otpadni mulj određivanjem lako (vodeni eluat) i teže (HNO3
eluat) pokretljive frakcije kao što su Cu2+,
Cr3+, Cd2+,
Ni2+, Pb2+,
Zn2+.
Cilj rada je prerada mulja kao opasnog otpada u koristan proizvod staklo-keramika,
uz eliminisanje opasnih i štetnih materija u životnoj sredini.
Eksperimentalna istraživanja su ostvarila cilj i potvrdila da se ovim
postupkom hemijski aktivne materije (Cu2+,
Cr3+, Cd2+,
Ni2+, Pb2+,
Zn2+) mogu prevesti faznim i hemijskim
transformacijama u izuzetno stabilnu strukturu gde se polutanti ne mogu
pokrenuti i pod kritičnim uslovima kao što su visoka temperarura, dejstvo
kiselina i baza i slično.
Ključne reči: otpadni mulj, eko-tehnološki postupak, staklo-keramika.
