Iodine number and surface area are main criteria to use plants as adsorbents.

Thanks a lot  and when you process leaf powder to use them as adsorbents, any other parameters would you prefer to say?

Please find below a link for complete characterization of adsorbents:

http://shodhganga.inflibnet.ac.in:8080/jspui/bitstream/10603/11525/9/09_chapter%204.pdf

thanks a lot and come back to you soon.

Other parameters such as pH of the metal solution of interest, rate of adsorption, effect of temperature on the biomass, effect of concentration are necessary for one to say that a particular biosorbent is good for adsorption.

please check http://dx.doi.org/10.1016/j.cej.2012.05.004

Thank you prof. Paul