Sono-electrochemical recovery of metal ions from their aqueous solutions

Bingfeng Dong, Asher Fishgold, Paul Lee, Keith A Runge, Pierre A Deymier, Manish K Keswani

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Metal recovery from aqueous waste streams is an important goal for recycling, agriculture and mining industries. The development of more effective methods of recovery have been of increasing interest. The most common methods for metal recovery include precipitation, electrochemical, ion exchange, flocculation/coagulation and filtration. In the current work, a sono-electrochemical technique employing sound field at megasonic frequency (500 kHz or 1 MHz) in conjunction with electrochemistry is evaluated for enhanced recovery of selected metal ions (palladium, lead and gallium) with different redox potentials from their aqueous solutions. The surface morphology and elemental composition of the metal deposits were characterized using scanning electron microscopy, energy dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy. The percent recovery was found to depend on the type of metal ion and the megasonic frequency used. Palladium was recovered in its metal form, while lead and gallium were oxidized during or after the recovery process.

Original languageEnglish (US)
Pages (from-to)379-387
Number of pages9
JournalJournal of Hazardous Materials
Volume318
DOIs
Publication statusPublished - Nov 15 2016

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Keywords

  • Electrochemistry
  • Megasonic
  • Metal recovery
  • Sonochemistry

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

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