engleski

Waste molding sand as an agent for the removal of Cu(II) and Zn(II) ions from aqueous solution

This article presents the application ofnon- hazardous waste molding sand from gray cast iron foundry as an inexpensive adsorbent for removal ofZn(II) and Cu(II) ions from aqueous solutions. The experiments were performed at room temperature using a multi solution (Zn + Cu) with concentration was 100 mg/l. The process of removal of Zn(II) and Cu(II) ions was monitored at different contact times of waste molding sand and metal ions. The experimental data were processed by two different kinetic theories. The pseudo-first-order and pseudosecond-order models were used for modeling the kinetic rates. Obtained results show that the waste molding sand has significant potential for the removal of Zn(II) and Cu(II) ions from aqueous solutions. Research shows that the removal ofCu(II) ions was better than removal of Zn (II) ions. It is possible to conclude that the mutual competition ofCu(II) and Zn(II) ions for adsorption sites affect the intensity oftheir removal.

waste molding sand ; Zn(II) ions ; Cu(II) ions ; adsorption

Rad je prezentiran na skupu 22nd International scientific technical conference "Foundry 2015", održanom od 16.-17.04.2015.g., Pleven, Bugarska.