As per my knowledge, there should be some interaction then only it get reduced. Pls. comment how reduction/removal/adsorption happens. What factors act as a driving force in interaction and removal of Cr(VI) element.
Simple absorption of negative ions such as PO42-- will cause neutralization of the charge. Similar effects take place in water treatment facilities every day of the year (expect here negatively charged biological material is precipitated with polyvalent ions such as Al3+) and froth flotation of minerals where negatively charged xanthate ions float positively charged galena, chalcopyrites and other minerals.
But for neutralization opposite charge containing ions can only be interacted. How same charge containing one will help in neutralization process?
Can you let me know where you have seen the adsorption of chromate with Fe(0) NPs.
I am talking iron nanoparticles functionalized with organic molecules. If they have negative surface charge then how could they interact with chroimum at neutral pH.
Which of the materials you are using have negative charge? Iron nanopartcles or these NP after functionalization with organic molecule? What is the organic molecule you are using?
These organic molecules are from biological origin. They are just a mixtrue of biomolecules such as lipid, protein and polysaccharides.
For such case it is possible that you have oxidation- reaction reaction between the chromate and the biomolecules you are using and not mere adsorption.Try to mix the chromate with these biomolecules in free state not fixed on iron NPs. If you see that the chromate disappears and instead you get Cr(III) at the end , then you have a redox reaction.
I would like to know a type of polymer which has high ability for adsorption of oil droplets from water.
- Badges
- Science topic
- Similar topics
- Chemistry
- Nanotechnology
- Nanostructured Materials
- Nanoparticles