Adsorbent material, its manufacturing method, and a method for recovering precious

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PROBLEM TO BE SOLVED : To provide an adsorbent capable of obtaining the adsorbing ability of noble metals, method for producing the same, and a method for recovering the noble metals.SOLUTION : An adsorbent has a granular base material and a graft chain introduced into the base material. The graft chain includes a graft chain constituted of a polymer having a side chain shown by the general formula (1). In the general formula, R, R, Rare a 1-10C hydrocarbon group independently from each other, A is a 1-6C alkylene group, X- is a counter ion of a quaternary ammonium cation.