Summary
A sorbent was prepared with branched polyethylenimine fixed on bead cellulose without chemical reaction. The “jack-in-the-box” effect was used by means of which a part of the originally adsorbed PEI remains, after treatment with strong acid, almost irreversibly fixed to cellulose. The sorbent contains 1.4–3.0 mmol N/g of dry matter and is able to bind some double-charged cations from acid solutions, both from buffered media (pH 2–4) and from hydrochloric acid (1–4 M).
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Vláčil, F., Kahovec, J., Jehličková, A. et al. A metal sorbent with an unbound complexing agent: polyethylenimine-bead cellulose. Polymer Bulletin 24, 533–538 (1990). https://doi.org/10.1007/BF00395576
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DOI: https://doi.org/10.1007/BF00395576