Abstract
We propose a novel technique for the removal of heavy metal waste from contaminated water. Our method consists in using dielectrophoresis (DEP) to trap hydroxyapatite (HAP) particles of 1 μm size in water after they have adsorbed heavy metal (Pb, Zn, Cu, Co and Cr). Although HAP can adsorb heavy metals in water and as such offers great promise as a waste-cleaning tool [1-3], one of the current challenges is the efficient removal of the HAP particles once they have adsorbed the heavy metals. We show in this paper that DEP can be used to concentrate such particles in certain regions, thus rendering the rest of the solution volume nearly free of contaminated particles. We present here both experimental and numerical results for suspensions at low concentrations.
Original language | English (US) |
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Pages (from-to) | 461-466 |
Number of pages | 6 |
Journal | Journal of Hazardous Materials |
Volume | 139 |
Issue number | 3 |
DOIs | |
State | Published - Jan 31 2007 |
All Science Journal Classification (ASJC) codes
- Environmental Engineering
- Environmental Chemistry
- Waste Management and Disposal
- Pollution
- Health, Toxicology and Mutagenesis
Keywords
- Calcium hydroxyapatite (HAP)
- Dielectrophoresis (DEP)
- MEMS
- Microfluidics
- Removal of heavy metals
- Waste water filtration