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Mechanism of deleading of silicate glass by 0.5 N HNO3

Sadrnezhaad, K ; Sharif University of Technology | 2009

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jnoncrysol.2009.08.019
  3. Publisher: 2009
  4. Abstract:
  5. Mechanism of removal of lead from silicate glass containing 68.5 wt% PbO by 0.5 N HNO3 was investigated by incorporation of the chemical-analyses/weight-loss data into shrinking-core model (SCM) and minimization of the difference. Scanning electron microscopy (SEM), emission spectrometry with inductively coupled plasma (ICP), X-ray diffraction (XRD) and energy dispersive X-ray analysis (EDS) were used to determine the compositional changes of the lead-silicate glass (LSG) samples. Dual inter-diffusion chemical reaction mechanisms having respective activation energies of 83.49 and 47.80 kJ/mol dominated the deleading process. © 2009 Elsevier B.V. All rights reserved
  6. Keywords:
  7. Chemical durability ; Compositional changes ; Diffusion and transport ; Emission spectrometry ; Inter-diffusion ; Lead silicate glass ; SEM ; Shrinking core model ; Silicate glass ; Activation energy ; Diffusion ; Durability ; Glass ; Inductively coupled plasma ; Ion exchangers ; Metal recovery ; Scanning electron microscopy ; Silicates ; X ray diffraction ; X ray diffraction analysis ; Ion exchange
  8. Source: Journal of Non-Crystalline Solids ; Volume 355, Issue 48-49 , 2009 , Pages 2400-2404 ; 00223093 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0022309309005699#!