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Title: Extraction of lead from waste CRT funnel glass by generating lead sulfide – An approach for electronic waste management

Abstract

Highlights: • Sodium carbonate and free silica in the glass react to generate sodium silicate and carbon dioxide. • Sodium sulfide and lead silicate group of glass began to react to lead sulfide and sodium silicate. • Lead sulfide got together in the bottom of the crucible under the action of gravity. • The generated lead sulfide was separated and collected in the bottom of the crucible. - Abstract: Waste cathode ray tube (CRT) funnel glass is the key and difficult points in waste electrical and electronic equipment (WEEE) disposal. In this paper, a novel and effective process for the detoxification and reutilization of waste CRT funnel glass was developed by generating lead sulfide precipitate via a high-temperature melting process. The central function in this process was the generation of lead sulfide, which gathered at the bottom of the crucible and was then separated from the slag. Sodium carbonate was used as a flux and reaction agent, and sodium sulfide was used as a precipitating agent. The experimental results revealed that the lead sulfide recovery rate initially increased with an increase in the amount of added sodium carbonate, the amount of sodium sulfide, the temperature, and the holding time andmore » then reached an equilibrium value. The maximum lead sulfide recovery rate was approximately 93%, at the optimum sodium carbonate level, sodium sulfide level, temperature, and holding time of 25%, 8%, 1200 °C, and 2 h, respectively. The glass slag can be made into sodium and potassium silicate by hydrolysis in an environmental and economical process.« less

Authors:
 [1];  [2];  [3]
  1. School of Management, Tianjin University of Technology, Tianjin (China)
  2. (China)
  3. School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin (China)
Publication Date:
OSTI Identifier:
22742122
Resource Type:
Journal Article
Journal Name:
Waste Management
Additional Journal Information:
Journal Volume: 67; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0956-053X
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; CARBON DIOXIDE; CATHODE RAY TUBES; CRUCIBLES; ELECTRONIC EQUIPMENT; ELECTRONIC WASTES; GLASS; LEAD SULFIDES; RECYCLING; SILICA; SODIUM CARBONATES; SODIUM SILICATES; SODIUM SULFIDES; WASTE PROCESSING

Citation Formats

Hu, Biao, School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin, and Hui, Wenlong. Extraction of lead from waste CRT funnel glass by generating lead sulfide – An approach for electronic waste management. United States: N. p., 2017. Web. doi:10.1016/J.WASMAN.2017.05.048.
Hu, Biao, School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin, & Hui, Wenlong. Extraction of lead from waste CRT funnel glass by generating lead sulfide – An approach for electronic waste management. United States. doi:10.1016/J.WASMAN.2017.05.048.
Hu, Biao, School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin, and Hui, Wenlong. Fri . "Extraction of lead from waste CRT funnel glass by generating lead sulfide – An approach for electronic waste management". United States. doi:10.1016/J.WASMAN.2017.05.048.
@article{osti_22742122,
title = {Extraction of lead from waste CRT funnel glass by generating lead sulfide – An approach for electronic waste management},
author = {Hu, Biao and School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin and Hui, Wenlong},
abstractNote = {Highlights: • Sodium carbonate and free silica in the glass react to generate sodium silicate and carbon dioxide. • Sodium sulfide and lead silicate group of glass began to react to lead sulfide and sodium silicate. • Lead sulfide got together in the bottom of the crucible under the action of gravity. • The generated lead sulfide was separated and collected in the bottom of the crucible. - Abstract: Waste cathode ray tube (CRT) funnel glass is the key and difficult points in waste electrical and electronic equipment (WEEE) disposal. In this paper, a novel and effective process for the detoxification and reutilization of waste CRT funnel glass was developed by generating lead sulfide precipitate via a high-temperature melting process. The central function in this process was the generation of lead sulfide, which gathered at the bottom of the crucible and was then separated from the slag. Sodium carbonate was used as a flux and reaction agent, and sodium sulfide was used as a precipitating agent. The experimental results revealed that the lead sulfide recovery rate initially increased with an increase in the amount of added sodium carbonate, the amount of sodium sulfide, the temperature, and the holding time and then reached an equilibrium value. The maximum lead sulfide recovery rate was approximately 93%, at the optimum sodium carbonate level, sodium sulfide level, temperature, and holding time of 25%, 8%, 1200 °C, and 2 h, respectively. The glass slag can be made into sodium and potassium silicate by hydrolysis in an environmental and economical process.},
doi = {10.1016/J.WASMAN.2017.05.048},
journal = {Waste Management},
issn = {0956-053X},
number = ,
volume = 67,
place = {United States},
year = {2017},
month = {9}
}