废光谱感光板中银的提取

Recovery of Silver from Waste Spectral Photographic Plates

摘要: 废光谱感光板用自来水浸泡，剥离的乳胶经氢氧化钠和双氧水溶解后，在微酸性溶液中加入锌粉置换出银，银沉淀经过滤和硼砂与碳酸钠的混合熔剂熔炼后得到成品银锭。采用建立的方案提取废光谱感光板中成品银的纯度达到95．4％，工艺操作简便，成本低、环境污染小。

Abstract: A method for recovery of silver from waste spectral photographic plates was developed. The waste spectral photographic plate was soaked with tap water and silver-containing film was separate from the plate. The film was then dissolved with NaOH-H2O2 and s