Ion exchanger filled cartridge and metal removing column

A cartridge accommodated inside an accommodating container of a metal-removing column comprising:

• a cylinder portion filled with at least one of an ion-exchange resin and a monolithic organic porous ion-exchanger;
• an upper lid in which a through hole for the liquid to be treated is formed and which is provided on an upper end of the cylinder portion;
• a lower lid in which a through hole for a treated liquid is formed and which is provided on a lower end of the cylinder portion;
• an insertion pipe connected to the lower lid, having an O-ring attached to an outer side, and inserted into a treated liquid discharge pipe provided on a bottom portion of the accommodating container of the metal removing column;
• an upper-lid sandwiching member in which a passage port for the liquid to be treated is formed;
• and
• an upper-lid side unwoven cloth or mesh,
• wherein the upper-lid side unwoven cloth or mesh is sandwiched between the upper lid and the upper-lid sandwiching member.