Institut Charles Gerhardt Montpellier, UMR 5253 CNRS-UM2-ENSCM-UM1, CC 1503, Université Montpellier 2, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France.
J Hazard Mater. 2009 Dec 15;172(1):117-23. doi: 10.1016/j.jhazmat.2009.06.137. Epub 2009 Jul 3.
As a possibility to clean waste CRT glass, treatment of lead-containing glass with a reducing agent, SiC or TiN, leads to a porous material containing metallic lead, Pb(0), located on the surface of the pore, and unreduced lead, Pb(II). The influences of reducing agent content, of the time, and at last of the temperature on lead reduction were analysed. Our investigations have pointed out significant differences as a function of the used reducing agent. CRT glass heat treated with SiC lead to less Pb(0), compared to TiN as shown by X-ray diffraction, and differential scanning calorimetry (DSC). It has been also evidenced that lead reduction occurs on randomized zones inside the sample leading to macroscopic lead beads inside glassy samples. XPS and XAS measurements were also carried out to investigate the local structure of lead and have evidenced a change of role of lead inside the glassy framework in function of the used conditions.
作为一种清洁废 CRT 玻璃的可能性，用还原剂 SiC 或 TiN 处理含铅玻璃会导致形成一种多孔材料，其中含有位于孔表面的金属铅 Pb(0) 和未还原的铅 Pb(II)。分析了还原剂含量、时间和温度对铅还原的影响。我们的研究表明，不同还原剂的影响有显著差异。与 TiN 相比，用 SiC 热处理的 CRT 玻璃导致 Pb(0) 减少，这一点通过 X 射线衍射和差示扫描量热法（DSC）得到证实。还证明了铅还原发生在样品内部的随机区域，导致玻璃样品内部出现宏观铅珠。XPS 和 XAS 测量也用于研究铅的局部结构，并证明了在不同条件下铅在玻璃骨架内的作用发生了变化。
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