Removal of lead from cathode ray tube funnel glass by chloride volatilization

G. Grause, N. Yamamoto, T. Kameda, T. Yoshioka

研究成果: Article査読

33 被引用数 (Scopus)


Cathode ray tube funnel glass is an environmentally problematic relict of old television sets. In particular, landfilling of this material is strongly discouraged because of its high lead content. However, recovery of this toxic lead could prevent its release into the environment and allow its reuse. In this research, lead was separated from the glass matrix by a chloride volatilization process. Melting of the funnel glass together with CaCl2 resulted in the volatilization of 80 % of lead at 1,000 °C. The use of NaCl as a chlorination agent yielded less volatile lead, while poly(vinyl chloride) and gaseous HCl proved to be ineffective chlorination agents. The differences in the chlorination agent efficiencies could be attributed to differences in the corresponding formation of silicates. Energy-dispersive X-ray spectroscopy showed that diffusion plays an important role in the volatilization of PbCl2.

ジャーナルInternational Journal of Environmental Science and Technology
出版ステータスPublished - 2014 5月

ASJC Scopus subject areas

  • 環境工学
  • 環境化学
  • 農業および生物科学(全般)


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