I am looking for separation and recovery of iron based nano particles from water stream. Nano particle size is in the range of 50 nm to 1000 nm with 80% particles below 100 nm. Till now I have used following techniques
1. Settling. It Higher takes more than 6 hours for nano particles settling and hence not feasible
2. Ultrafiltration separation - concentration of nano particles is too high for UF membranes to work
Magnetic separation - Did a pilot for magnetic speration but didn't succeeded. Not able to arrive at right surface area of magnetic material for complete (or more than 99%) removal
If anybody has better idea
You can try centrifuging at low temperature, I think it will work.
Dear Yashwant
at first you must draw Magnetization curve at 25 C of your adsorbent. From the characterization results, the saturation magnetization (M) of the magnetic material can be carried out.
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