Yes Clayne can use bleach, or ferric chloride, then rinse & refix to remove all remaining silver from scrap prints/films. That's how silver is recovered from Xray films, old litho film etc, we used to reprocess many tons a year that way, the fixer recycling through a plating unit continuously.

However there's not a lot of silver in paper in the first place so it's less economic to process that way, it's usually incinerated commercially.

Ian