You mean Chlorite ion (ClO2-) or Chlorite Mineral ((Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6)? I am asking this since magnetite nanoparticles can either be synthesized/utilized in various chemical environments, or magnetite mineral might be required to be removed from chlorite mineral for mineral extraction and analysis. For the first case, use mild reducing agents that do not react much with magnetite but reduce ClO2- to Cl-.As for the second case, assuming you require froth flotation technique, you may use iron attracting proteins like ferritins or might use sulfur-containing agents like sodium xanthate. Likely A Basic pH would do the job, but the exact amount cannot be guessed beforehand.

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