Leaching behavior of CRT funnel glass

Masaru Yamashita, Anucha Wannagon, Sachiko Matsumoto, Tomoko Akai, Hajime Sugita, Yukari Imoto, Takeshi Komai, Hirofumi Sakanakura

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

The leaching behavior of cathode ray tube (CRT) funnel glass containing 23 mass percent of Pb in 0.001N HCl, distilled water, and 0.001N NaOH at 90°C was investigated using a static method. The weight loss and leached amount of each component was measured and surface changes observed by SEM. The leaching mechanism is discussed. In acid solution, the leached amount of Pb showed t1/2 dependence, that is, diffusion-controlled dependence, which is common in lead silicate glasses. In water and basic solutions, the leached amount showed saturation after higher initial dissolution than in acid and the deposition of many particles on the surface was observed. The amount leached was less for Pb than other components. The deposited particles formed a protective layer, which suppressed the dissolution of the glass. This dense layer must be formed as a result of a high initial dissolution rate.

Original languageEnglish
Pages (from-to)58-64
Number of pages7
JournalJournal of Hazardous Materials
Volume184
Issue number1-3
DOIs
Publication statusPublished - 2010 Sep 22
Externally publishedYes

Keywords

  • CRT glass
  • Chemical durability
  • Environmental safety
  • Leaching
  • Lead silicate glass

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

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