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The Chemical Educator
ISSN: 1430-4171 (electronic version)
Abstract Volume 22
(2017) pp 135-136
Recovering Bulk Gold From Scrap Electronics to Synthesize
Gold Colloids
Mathias Jacobs, Ben Meynaerts,
Natalie Chiaverini and Tom Mortier*
Faculty of Management and Technology, University Colleges Leuven-Limburg, Herestraat 49, 3000 Leuven, Belgium, tom.mortier@ucll.be
Received January 18, 2017. Accepted August 7, 2017.
Published: 11 August 2017
Abstract. We
report the synthesis of starch stabilized gold colloids starting from bulk gold
being recovered from scrap electronics such as integrated circuits or chips.
The bulk gold was rinsed with concentrated nitric acid and subsequently
dissolved in aqua regia. After the
evaporation of the acidic solution, the yellow gold salt was dissolved in
demineralized water and characterized by UV/Vis spectroscopy. Ruby red gold
sols were prepared by adding starch to the chloride ligand stabilized gold(III)
solution and reduced by adding trisodiumcitrate. The gold sols were
characterized with UV/Vis spectroscopy.
Key Words: Laboratories and Demonstrations; physical chemistry; nanotechnology; gold colloids; UV/Vis spectroscopy
(*) Corresponding author. (E-mail: tom.mortier@ucll.be)
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