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This document discusses a study on using polymer-supported hydrated iron(III) oxide (HFO) nanoparticles for arsenic removal. The key finding was that anion exchange resins dispersed with HFO nanoparticles provided much higher arsenic removal than cation exchange resins, due to the Donnan membrane effect. Specifically, the negatively charged sulfonic acid groups in cation exchangers excluded arsenate ions from entering the polymer phase, while the positively charged groups in anion exchangers did not hinder

Author

Litz Norma TF

Language

EN