ORIGINAL RESEARCH
Modification of the Process of Heavy Metals
Immobilization in Wastewater Sludge
P. M. Słomkiewicz, J. A. Zdenkowski*
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Institute of Chemistry, Świętokrzyska Academy, Chęcińska 5, 25-020 Kielce, Poland
Pol. J. Environ. Stud. 2003;12(2):231-237
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ABSTRACT
This paper presents the results of laboratory research on the process of heavy metals extraction from
sludge, where heavy metals content exceeds permissible levels. The method of immobilization of heavy
metals depends on using the developed technology hygienization process of wastewater sludge (which is
pending by patent) to environment utilization. The base of this technology is treatment of municipal wastewater
sludge by dust from electrofilters of cement mills with the addition of roasted raw detrital basalt. The
modification of this technology involves using the additional unit operation that is followed by extraction of
the excessive amount of heavy metals from sludge. The results of heavy metals extraction from wastewater
sludge were presented.