I am conducting an adsorption test (of Cr6+) on an adsorbent.
I did the adsorption tests without background electrolyte(BE) by just dissolving the Cr source in Milli-Q water. I also did a test with different background electrolytes (0.01-.1M NaCl, KCl, CaCl2, NaNO3).
Can somebody with experience on adsorption tests enlightment me. Thanks a lot!
Hi.
Short comment: yes, electrolytes will have effects on the adsorption of metals. The effect is, however, different depending on the specific nature of species of interest, structure of the adsorbent and type of adsorption phenomena. You should be extra carefull with species that generate diferent ions as functions of properties of the aqueous phase, as for example, CR6+. The ion will be Cr2O7 (2-) in acid pH and CrO4 2- in basic pH.
This article is a very good review of what you need. Start by reading it carefully.
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Cheers!
