Polymer recovery from photographic

Application of Polymer-Bound Reducing Agents for Silver Recovery from Photographic Fixer. Several 10-mL aliquots of a spent photographic fixer solution containing 0.55% silver were diluted to 100 mL and adjusted to 5 different pH levels 4.5, 5.5, 6.5, 7.5, and 8.5. One gram of borohydride-form A-26 anion-exchange resin was added to each sample. The samples were stirred and allowed to stand at 20 °C for 30 min. 

Fig. 22 (a-f) Time series photographs showing recovery of shape-memory tube from start to finish of the process total time 10 s, at 50 °C. The tube was made of PCL-dimethacrylate polymer network that had been programmed to form a flat helix. Reprinted from [323] with permission... 

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