Arsenic removal from aqueous solutions by adsorption onto hydrous iron oxide-impregnated alginate beads
| Autor: | Abinashi Sigdel, Jeong-Won Park, Hyoeun Kwak, Pyung Kyu Park |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Aqueous solution
General Chemical Engineering Kinetics Inorganic chemistry Iron oxide chemistry.chemical_element 02 engineering and technology 010501 environmental sciences 021001 nanoscience & nanotechnology Phosphate 01 natural sciences chemistry.chemical_compound Adsorption chemistry Chemisorption Diffusion (business) 0210 nano-technology Arsenic 0105 earth and related environmental sciences |
| Zdroj: | Journal of Industrial and Engineering Chemistry. 35:277-286 |
| ISSN: | 1226-086X |
| Popis: | Hydrous iron oxide impregnated alginate beads were developed for effective arsenic removal from water. As(III) adsorption was maximized at neutral pH while As(V) adsorption was higher in acidic conditions. Adsorption efficiency for both As(III) and As(V) mostly increased with increasing iron loading, but As(V) adsorption slightly decreased at high iron loading. Phosphate showed a pronounced interfering effect, especially at high concentration. Kinetics data fitted to pseudo-second-order and intra-particle diffusion model suggested chemisorption and intra-particle diffusion might mainly govern As(III) and As(V) adsorption, respectively. Beads were regenerated using NaOH solution and successfully reused for multiple cycles. |
| Databáze: | OpenAIRE |
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