Article The influence of different agitation techniques on the adsor...

In batch system we usually use stirrer. What kind it is up to you. Regards,

Hi dear,

Stirrer is used for many purposes such as: Homogenization of phases, matter and heat. the mixer also serves to facilitate the contact between phases, to increase the contact area and therefore the adsorption will be improved. The mixer performance depends on several parameters such as: the gemetry of the enclosure, the geometry of mobil agitator, the presence or absence of vortices, the presence or absence of baffles, foaming, the power of mobil, adimensional numbers like Reynolds, Newton etc.

With my best wishes.

Dr. Adel OUESLATI

Thanks everyone.

In the case of adsorption, mixing primarily eliminates the resistance of transport phenomena and homogenizes the concentration field. It also raises the solid phase - that is, as you noticed, increases contact area. Hundreds of books have been written about mixing and stirrers. Regards,

Dear Adrij

I think it will be better to use 'Orbital shaker' equipped with temperature sensor for such kind of metal oxyanion adsorption, if using any solid (porous) materials, in your case TiO2.

Indeed, while carrying out the Cr(VI) adsorption using functionalized silica, I have found my material was being crushed when used magnetic stirrer in a beaker. It then worked efficiently when the beaker was kept on the Orbital shaker, since the instrument let the adsorption of any adsorbate, homogeneously.

Hope, it may work for you.

Best Regards

We have used both orbital shaker and magnetic stirrers and up to me results are identical.

Dear Adrij: the agitation process is critical in the adsorption studies. Since it favors the diffusion of the adsorbate to the pores of the adsorbent, it minimizes the effects due to the transport phenomena and homogenizes the adsorption medium. The main difficulty of using magnetic stirrers is the reproducibility of the data, since the geometry of the magnetic stirrer affects, among other factors, the Reynolds number. So you should make sure to use identical magnetic stirrers in the replicas of the adsorption studies.

Thanks Madam for your valuable input. I am using three identical magnetic stirrers.

Thanks everyone.

Dear sir in batch adsorption studies all are using magnetic stirrer but the magnetic bead will be adsorb some amount of dyes or heavy metals, better you will use rotatory shekar if available otherwise high quality beads you will use and do the batch adsorption studies...

Hello Sir, I hope you are correct but for a small bead coated with plastic it might not happen. I also do not have any other option.