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Batch removal of Cd(II), Cu(II), Ni(II), and Pb(II) ions using stabilized zero-valent iron nanoparticles


Saulius Vasarevičius

Vaidotas Danila
Abstract In this study, a commercial aqueous dispersion of nZVI was applied for the removal of Cd(II), Cu(II), Ni(II), and Pb(II) ions from their aqueous solutions. The removal efficiency was studied using two mass ratios of nZVI to heavy metal: 7–9:1 and 140–180:1. In the first case, the capacities of heavy metals removal were found to be 79.33–102.00 mg per g of nZVI for Cd, 111.11-142.85 mg per g of nZVI for Cu, 107.30–137.96 mg per g of nZVI for Ni, and 110.97–142.68 mg per g of nZVI for Pb. In this treatment, nanoparticles formed larger structures with heavy metals and they were easily removed from water by filtration. In the second case, the removal efficiencies of heavy metals were lower. There were more discrete nanoparticles that not formed larger structures and could not be easily filtered. In this treatment, the acidification of the filtered solutions caused the formation of deposits and subsequent re-dissolution of some heavy metals back to solutions.
- Vilnius Gediminas Technical University Lithuania
- Vilnius Gediminas Technical University Lithuania
- Vilnius University Lithuania
citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).29 popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.Top 10% influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).Top 10% impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.Top 10%
