| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an effective method for collecting silver from a waste photographic processing liquid. SOLUTION: The method for collecting silver from the waste photographic processing liquid containing silver ions, includes contacting the waste photographic processing liquid containing silver ions with a material containing fine metal particles which are dispersed in a binder matrix of hydrophilic colloid, and have higher positive oxidation potential than silver, and reducing the silver ions into metallic silver.</p> |
