Summary: A novel, magnetic, strong acid cation nano‐adsorbent has been developed by the covalent binding of poly(acrylic acid) on the surface of Fe 3 O 4 nanoparticles followed by sulfonation using sulfanilic acid via carbodiimide activation. The nano‐absorbent can be easily recovered or manipulated with an external magnetic field and shows a good capacity for the rapid and efficient adsorption of multivalent metal cations from aqueous solutions. An illustration for the binding and sulfonation of PAA on Fe 3 O 4 nanoparticles to produce a magnetic, strong acid cation nano‐adsorbent. magnified image An illustration for the binding and sulfonation of PAA on Fe 3 O 4 nanoparticles to produce a magnetic, strong acid cation nano‐adsorbent.
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Mak et al. (2005) studied this question.
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