Leaching behavior of CRT funnel glass.
The leaching behavior of cathode ray tube (CRT) funnel glass containing 23 mass percent of Pb in 0.001 N HCl, distilled water, and 0.001 N 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 t(1/2) 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.
Yamashita
Masaru
M
Advanced Glass Group, Research Institute for Innovation in Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), AIST Kansai, 1-8-31 Midorigaoka, Ikeda 563-8577, Japan. Electronic address: m-yamashita1@ni.aist.go.jp.
Wannagon
Anucha
A
Advanced Glass Group, Research Institute for Innovation in Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), AIST Kansai, 1-8-31 Midorigaoka, Ikeda 563-8577, Japan; Ceramic Design and Manufacturing Group, National Metal and Materials Technology Center (MTEC), NSTDA, Paholyothin Rd., Klong 1, Klong Luang, Pathumthani 12120, Thailand.
Matsumoto
Sachiko
S
Advanced Glass Group, Research Institute for Innovation in Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), AIST Kansai, 1-8-31 Midorigaoka, Ikeda 563-8577, Japan.
Akai
Tomoko
T
Advanced Glass Group, Research Institute for Innovation in Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), AIST Kansai, 1-8-31 Midorigaoka, Ikeda 563-8577, Japan.
Sugita
Hajime
H
Institute for Geo-Resources and Environment, National Institute of Advanced Industrial Science and Technology (AIST), AIST Tsukuba West, 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan.
Imoto
Yukari
Y
Institute for Geo-Resources and Environment, National Institute of Advanced Industrial Science and Technology (AIST), AIST Tsukuba West, 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan.
Komai
Takeshi
T
Institute for Geo-Resources and Environment, National Institute of Advanced Industrial Science and Technology (AIST), AIST Tsukuba West, 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan.
Sakanakura
Hirofumi
H
Research Center for Material Cycles and Waste Management, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan.
D004566:Electrodes; D005898:Glass; D007854:Lead / Q000737:chemistry
D007854:Lead