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2015 | 17 | 1 | 7-10
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Reactivity of nano zero-valent iron in permeable reactive barriers

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In this paper, the ability of nZVI to remove heavy metals (Cd, Cu, Ni, Pb, Zn) from multicomponent aqueous solutions was investigated through batch experiments. The experimental data were fitted to a second-order kinetic model based on solid capacity. The data for copper and lead fitted well into the second-order kinetic model, thus suggesting that the adsorption had a physical character. The values of the removal ratio and the second-order rate constant indicated that the order of adsorption priority of nZVI was as follows: Pb>Cu>Zn>Cd>Ni. The adsorption isotherm data were described by the most conventional models (Henry, Freundlich, and Langmuir). Equilibrium tests showed that copper and zinc were removed from the solution by adsorption processes, i.e., complexation and competitive adsorption. The test results suggested that the removal processes using nZVI are more kinetic than equilibrium. The study demonstrated that nZVI is favorable reactive material; however, comprehensive investigation should be performed for further in situ applications in PRB technology.

Opis fizyczny
  • Warsaw University of Life Sciences – SGGW, Faculty of Civil and Environment Engineering, Nowoursynowska 159, 02-773 Warsaw, Poland,
  • Warsaw University of Life Sciences – SGGW, Faculty of Civil and Environment Engineering, Nowoursynowska 159, 02-773 Warsaw, Poland
  • Warsaw University of Life Sciences – SGGW, Faculty of Civil and Environment Engineering, Nowoursynowska 159, 02-773 Warsaw, Poland
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