Activated carbon for precious metal adsorption, precious metal adsorption filter and precious metal recovery method

摘要

Difference in absolute value between the zeta potential in 10 mmol / L sodium tetraborate aqueous solution and the zeta potential in 0.01 mmol / L sodium tetraborate aqueous solution in activated carbon for adsorbing noble metals from aqueous solutions containing noble metals ) Of 18 mV or less and a pore volume of 1 nm or less is adjusted to 150 to 500 mm 3 / g. The activated carbon of the present invention may have a sugar liquid decolorization performance of 30% or more. The aqueous solution containing the noble metal may be a plating waste solution. According to the present invention, a noble metal can be efficiently adsorbed (or recovered) from a noble metal-containing liquid.