先端化学工学ジャーナル

概要

Sliver Recovery from Waste X Ray Photographic Films by Electro Deposition

Satyanarayana DNV, Ramesh Chandra K

Silver is a precious metal that has the highest reflectivity, as well as the highest electrical and thermal conductivity’s when compared to any other metal. The waste X-ray photographic films containing 1.5 - 2 % (w/w) black metallic silver would be used for recovery and reuse. Around 18-20% of the world's silver needs are supplied by recycling photographic waste. The silver deposited was analyzed by SEM, EXD in this study. Global demand for silver remains steadily increasing; from 25,700 metric tons in 2016 to 27,000 metric tons in 2019. More than half of silver produced in the world is used in industries. Extraction of silver from the ore is expensive and harmful to the environment. Xray technique is greatly helpful for diagnosis of patient problems and hence widely used till date. Worldwide research is going on for extraction of high purity silver from the waste X-ray films, One of the novel, simple, fast, cheap and pollution-free method developed for recovering silver from waste X-ray photographic films is electro deposition and is attempted in the present study.