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It is well-known that chitosan consists of amino groups for the chelation of metal ions while NH 2 -MCM-41 has excellent adsorption selectivities for metals. This work compares both adsorption capacities and selectivities of chitosan and NH 2 -MCM-41. It has been found that chitosan has adsorption capacities of 1.76mmol/g, 1.03mmol/g and 1.30mmol/g for Cu 2+ , Ni 2+ ...
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