Title: A study on PbO in CRT funnel glass at high-temperature condition

Authors: Zhongguo Li; Wenyi Yuan; Shufang Ding; Ying Chen; Jinhui Li

Addresses: College of Earth and Environmental Science, Lanzhou University, Lanzhou 730000, China; Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China. ' Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China. ' Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China. ' Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China. ' Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China

Abstract: Glasses from the end-of-life Cathode Ray Tubes (CRTs) represent a pressing environmental problem, especially the funnel glass containing high lead concentration. To avoid lead contamination and re-utilise it, it is of great importance to study the separation process of lead contained in the funnel glass. In this study, the microstructure of scrap funnel glass and molten funnel glass were analysed by SEM and XRF. The results indicated that the PbO content in the top was more than that in the bottom. PbO would be released from scrap funnel glass at high-temperature condition when Na2O was added into the glass specimens.

Keywords: end-of-life CRTs; EOL; cathode ray tubes; PbO; funnel glass; microstructure; high temperature; lead concentrations; scrap glass; molten glass; sodium oxide; lead oxide.

DOI: 10.1504/IJETM.2012.045144

International Journal of Environmental Technology and Management, 2012 Vol.15 No.1, pp.16 - 27

Received: 09 Jul 2009
Accepted: 03 Aug 2010

Published online: 17 Dec 2014 *

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