Phosphate filtering characteristics of a hybridized porous Al alloy prepared by surface modification
- Phosphate filtering characteristics of a hybridized porous Al alloy prepared by surface modification
- 서영익; Young Jung Lee; Ki Ho Hong; Duk Chang; Dae-Gun Kim; 이규환; Young Do Kim
- Pore structure control; Alkali surface modification; Permeability; Filtration; Phosphorus removal
- Issue Date
- Journal of hazardous materials
- VOL 173, NO 1-3, 789-793
- In this study, a porous Al alloy filter was designed for water purification systems. The combination
of higher permeability for fluid flow and excellent filtering characteristics for removing pollutants is
required for water purification. The filter’s macropore structure was controlled by a powder metallurgical
process using granulated powders for high permeability and its micropore structure was generated
by alkali surface modification on the macroporous sintered body for enhanced filtration efficiency. After
surface modification, the specific surface area was increased by 10 times over the as-sintered specimen.
Phosphate filtering characteristic was noticeably improved by a ligand exchange between phosphate and
aluminum hydroxide formed by alkali surface modification.
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