Development of the procedure for stabilizing toxic metals from the technological process of galvanization

[A. S. Stojković]

150 str.

Bibliografija: listovi 114-150. Biografija autora: list [155].

System risks and safety

According to its qualitative and quantitative properties, the technological process of galvanization is one of the most complex waste water polluters/ polluters of waste water. Polluting substances found in galvanic waste water (metal ions, cyanides, acids, bases, organic solvents, etc.) are most often removed using conventional methods (chemical oxidation and reduction, neutralization, precipitation, coagulation and flocculation), resulting in secondary contamination in the form of galvanic sludge that has been classified as hazardous waste. If it is not treated or inclined of improperly, the easily mobile metal fraction is eluted by atmospheric precipitation and pollutes the environment by being infiltrated. To support this idea, the doctoral dissertation involved the inactivation of galvanic sludge using waste industrial materials (such as cathode glass, slag from the technological process of iron production, and ash from the thermal power plant) by incorporation into a stable eco-sintered product. In the obtained product, toxic metals cannot be activated even in extreme circumstances, such as elevated temperatures, acid precipitation, as well as in acids and bases; in that way, the risk of environmental pollution has been reduced.

galvanski mulj, toksični metali, stabilizacija, eko-sinterovani proizvod

galvanic sludge, toxic metals, stabilization, eco-sintered product

615.9.621.793 (043.3) 621.793

Т270

Tekst