Cu(II)-Fe(III) oxide doped anion exchangers - Multifunctional composites for arsenite removal from water via As(III) adsorption and oxidation
Irena Jacukowicz-Sobala , Daniel Ociński , Piotr Mazur , Ewa Stanisławska , Elżbieta Kociołek-Balawejder
AbstractThe aim of the present study was to investigate As(III) oxidation and adsorption on the surface of hybrid anion exchangers containing Cu(II)-Fe(III) binary oxide deposited in their porous structure with the same Cu:Fe ratio of 1:2 but with different amounts and distribution of inorganic deposit within polymeric beads. The equilibrium studies confirmed high adsorption capacity of the best hybrid polymer: 94.4 mg As/g. Moreover, the adsorption was effective over a wide pH range, selective in the presence of interfering ions, and the material was effectively regenerated. The performance of the hybrid polymer was also confirmed in the column process which enabled both As(III) and As(V) concentrations to be lowered from 500 μg/L to below 10.0 μg/L in a solution with a composition similar to natural groundwater. The breakthrough point of the bed was reached after the solution amounting to 1833 bed volumes passed through the column. Desorbed As speciation, FTIR and XPS studies showed that As(III) was mainly adsorbed on the surface of Cu-Fe oxides followed by its oxidation to As(V). In the oxidation reaction metal oxides acted as catalysts and adsorbents, while the oxidant was probably oxygen dissolved in solution.
|Journal series||Journal of Hazardous Materials, ISSN 0304-3894, e-ISSN 1873-3336, (N/A 200 pkt)|
|Publication size in sheets||0.6|
|Keywords in English||Cu-Fe binary oxides, arsenic, adsorption, heterogeneous oxidation, hybrid ion exchangers|
|ASJC Classification||; ; ; ;|
|Publication indicators||: 2018 = 2.055; : 2018 = 7.65 (2) - 2018=7.336 (5)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.