when we check the iron leaching of zinc ferrite NPs, what could possibly happen with zinc ions. Can we associate the Fe leaching with zinc leaching as both are supposed to be chemically bound.
It all depends on what kind of leaching solution you use. In the case of, for example, H2SO4, both iron and zinc will go into solution. However, when we take NaOH solution for leaching (1), basically almost zinc will go into the solution. Citric acid or ammonium chloride (2) could also act selectively in specified conditions (temperature, time, concentation of leaching agent, etc.).
Nimra - As mentioned by Krzysztof Gargul it depends on the conditions of the leaching process, i.e. if you use an acidic or basic leaching solution or a complexing agent like citric acid. For example, this article entitled "Extraction of zinc from zinc ferrites by alkaline leaching: Enhancing recovery by mechanochemical reduction with metallic iron" reports the extraction of zinc from zinc ferrites by alkaline leaching. The article is available as public full text on RG.
Article Extraction of zinc from zinc ferrites by alkaline leaching: ...
The following article entitled "Extraction of zinc from zinc ferrites by alkaline leaching: enhancing recovery by mechanochemical reduction with metallic iron" is available open access (see attached pdf). It also describes an alkaline leaching process.
Leaching under acidic conditions is described in the attached article entitled "Selective leaching of zinc from zinc ferrite with hydrochloric acid".
Article Recovery of valuable metals from zinc leaching residue by su...
Dear Krzysztof Gargulthank you for your response. I have used zinc ferrite nanoparticles for wastewater treatment the pH of solution (wastewater) was neutral. After 5 times of reusability the treated solution was checked for iron leaching. Can you please help me in this regard that what happens to zinc ions after 5 time of reusability.
Probably the mechanism of action of zinc ferrite nanoparticles in the coagulation of pollutants is not related to complete ferrite dissolution. Ferrite is a compound of ZnO and Fe2O3, and only Fe2O3 can participate in the water purification process. ZnO may remain undissolved (especially at pH = 7) and zinc ions will not be found in the water after the filtration process. Try to perform a zinc mass balance and thus you will be able to determine the behavior of Zn during filtration.
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