Crosslinked EDTA ester of cellulose (with 1–1.3 mmole bonded EDTA/g) was synthesized by the treatment of bead cellulose with EDTA bis-anhydride. Compared with the iminodiacetic acid resin, the cellulose EDTA ester exhibits a higher stability of Cu(II) chelates at low pH and a very high sorption rate of Cu(II). The sorbent is stable in neutral and acid medium, but is hydrolyzed by alkalies.
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Kahovec, J., Matějka, Z. & Štamberg, J. EDTA ester of bead cellulose a fast-kinetics chelating sorbent. Polymer Bulletin 3, 13–17 (1980). https://doi.org/10.1007/BF00263200
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