Characterization of residue from leached cathode ray tube funnel glass: reutilization as white carbon black

Wenyi Yuan, Zhitong Yao, Kibu Chiyo, Jinhui Li

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Cathode ray tube (CRT) funnel glass remains an urgent environmental problem and is composed mainly of lead oxide and silicon oxide. In this research, the residue could be obtained from 2 h to 500 rpm activated CRT funnel glass after extracting lead via acid leaching under the conditions of HNO3 concentration 1.0 mol/L, leaching temperature 95 °C and leaching time 1 h. In order to reutilize the residue, its physico-chemical properties were characterized by scanning electron microscopy, Brunauer–Emmett–Teller, thermogravimetric analysis, X-ray diffraction and Fourier transform infrared spectroscopy. The results indicated that the residue was an amorphous superfine powder with approximately 93 wt% silica oxide and specific surface area of more than 170 m2/g. It can be reutilized as white carbon black.

Original languageEnglish
Pages (from-to)629-634
Number of pages6
JournalJournal of Material Cycles and Waste Management
Volume16
Issue number4
DOIs
Publication statusPublished - 2014 Jan 1

Keywords

  • Amorphous silica dioxide
  • CRT funnel glass
  • E-waste
  • Reutilization
  • White carbon black

ASJC Scopus subject areas

  • Waste Management and Disposal
  • Mechanics of Materials

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