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Purification of zinc plating wastewater using alkaline residue of electric arc furnace dust (CROSBI ID 572700)

Prilog sa skupa u zborniku | sažetak izlaganja sa skupa

Elez, Loris ; Oreščanin, Višnja ; Lovrenčić Mikelić, Ivanka ; Sofilić, Tahir ; Mikulić, Nenad Purification of zinc plating wastewater using alkaline residue of electric arc furnace dust // The 11th European Meeting on Environmental Chemistry (EMEC 11) : Book of abstracts / Trebše, Polonca ; Petrič, Marta ; Lavtižar, Vesna (ur.). Nova Gorica, 2010. str. 200-200

Podaci o odgovornosti

Elez, Loris ; Oreščanin, Višnja ; Lovrenčić Mikelić, Ivanka ; Sofilić, Tahir ; Mikulić, Nenad

engleski

Purification of zinc plating wastewater using alkaline residue of electric arc furnace dust

The purpose of this work was development of an appropriate procedure for the purification of zinc plating wastewater (ZPW) with alkaline solid residue (ASR) by-product of the alkaline extraction of zinc and lead from various types of electric arc furnace dust (EAFD). Removal efficiency of alkaline solid residue at optimum purification conditions (pH 8 and mixing time ; 20 minutes) for the elements Pb, Cr (VI), Cr (III), Fe, Ni, Cu and Zn were 99.17 %, 100 %, 100 %, 99.88 %, 100 %, 99.69 % and 99.95 %, respectively. The concentrations of all elements in the purified wastewater were significantly lower in relation to the upper permissible limit. The remaining waste mud was regenerated in the strong alkaline medium and successfully applied once again for the purification of zinc plating wastewater. Removal efficiencies of heavy metals accomplished with regenerated waste mud were comparable to these achieved by original alkaline solid residue. Elemental concentrations in the eluates of the waste mud were in accordance with regulated values. There was no progressive increase in toxicity of waste mud after its regeneration and repeated usage for zinc plating effluent purification which justified closed cycle of: EAFD alkaline extraction - usage of remaining alkaline solid residue for zinc plating effluent purification - regeneration of waste mud by alkaline extraction - usage of solid residue of waste mud for zinc plating effluent purification. Conducted research confirmed successful application of toxic waste from one industry for the treatment of waste from other industrial processes.

waste water; EAF dust; purification

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Podaci o prilogu

200-200.

2010.

objavljeno

Podaci o matičnoj publikaciji

The 11th European Meeting on Environmental Chemistry (EMEC 11) : Book of abstracts

Trebše, Polonca ; Petrič, Marta ; Lavtižar, Vesna

Nova Gorica:

978-961-6311-66-3

Podaci o skupu

European Meeting on Environmental Chemistry (11 ; 2010)

poster

08.12.2010-11.12.2010

Portorož, Slovenija

Povezanost rada

Temeljne tehničke znanosti