I'm studying to prepare different iron oxide nanoparticles such as hematite, magemite and magnetite and I'm planing to use all of them for strontium ion adsorption.. To find best adsorbent for the adsorption of strontium, I'm planing to use one of design expert method such as; CCD, Taguchi...etc. Can I use those nanoparticles which are three different level in a factor like pH, temperature..etc. when I design to experiment method?
You know that the main criterion for standardizing your adsorbents is the specific surface area. To make it the same to study the influence of nature on the adsorption capacity will be difficult. Depending on the pH, it is small, because оn the surface of nanoparticles will be identical hydroxyl groups. We have a patent for the use of magnetic ore nanoparticles of Kursk GOK for the adsorption of strontium. The magnetic saturation of the ore was greater than that of pure magnetite. The adsorption capacity is less than that of organic adsorbents.
I suggest you to use CCD because it has better results in adsorption researches.
If your user conditions like pH, Time and... are same for all adsorbents, you can use all of your adsorbents as a factor in CCD.
for this you most set the categoric factors to 1. and set the numeric factors as many as your user conditions (pH, Time and...) is.
and in next page you most set the categoric factors level (number of your adsorbents)
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