School of Environment, Tsinghua University, Beijing 100084, China.
Environ Sci Technol. 2012 Apr 3;46(7):4109-14. doi: 10.1021/es204387a. Epub 2012 Mar 19.
The disposal of scrap cathode ray tube (CRT) funnel glass has become a global environmental problem due to the rapid shrinkage of new CRT monitor demand, which greatly reduces the reuse for remanufacturing. To detoxificate CRT funnel glass by lead recovery with traditional metallurgical methods, mechanical activation by ball milling was introduced to pretreat the funnel glass. As a result, substantial physicochemical changes have been observed after mechanical activation including chemical breakage and defects formation in glass inner structure. These changes contribute to the easy dissolution of the activated sample in solution. High yield of 92.5% of lead from activated CRT funnel glass by diluted nitric acid leaching and successful formation of lead sulfide by sulfur sulfidization in water have also been achieved. All the results indicate that the application of mechanical activation on recovering lead from CRT funnel glass is efficient and promising, which is also probably appropriate to detoxificate any other kind of leaded glass.
由于新的 CRT 显示器需求迅速减少，报废阴极射线管（CRT）漏斗玻璃的处理已成为一个全球性的环境问题，这极大地减少了再利用进行再制造的机会。为了通过传统冶金方法回收铅来解毒 CRT 漏斗玻璃，采用球磨机械激活对漏斗玻璃进行预处理。结果表明，机械激活后，玻璃内部结构发生了实质性的物理化学变化，包括化学断裂和缺陷形成。这些变化有助于激活样品在溶液中容易溶解。通过稀硝酸浸出从激活的 CRT 漏斗玻璃中获得了 92.5%的高铅收率，并且在水中通过硫化硫化成功地形成了硫化铅。所有结果表明，机械激活在从 CRT 漏斗玻璃中回收铅方面是高效和有前途的，这也可能适用于解毒任何其他类型的含铅玻璃。
