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Journal of Clinical and Experimental Toxicology | Volume: 2
December 03-04, 2018 | Dubai, UAE
International Conference on
6
th
International Conference on
Toxicology, Clinical Toxicology & Pharmacology
Recycling & Waste Management
Joint Event
&
Recovery of silver from electronic waste
Dusan Orac, Jakub Klimko, Matus Szabo, Dusan Klein, Jana Piroskova
and
Ivana Urban Kobialkova
Technical University of Kosice, Slovakia
T
he paper deals with recovery of silver from solution after
leaching of electronic waste. Precipitation experiments
were performed in 0.1M thiosulphate solution where the
silver concentration was 4.7μ g/ml and in 0.5M thiosulphate
with a silver concentration of 5.98μg/ml. As precipitating
agents were chosen: NaBH
4
, Na
2
S
2
O
4
, KI, NaCl and Na
2
S. The
maximum efficiency of precipitation was 100% specifically
in two cases using NaBH
4
in a 0.1M solution at 60°C and
precipitation with NaCl with the addition of 2 ml H
2
O
2
also
in a 0.1M solution at 20°C. Precipitation efficiency above
95% was achieved with precipitation at 20°C, using NaCl as a
precipitant with the addition of 2 ml H
2
O
2
in 0.5M thiosulphate,
Na
2
S in a 0.5M solution and using NaBH
4
in 0.1M solution.
Speaker Biography
Dusan Orac works as an associate professor and co-director at Institute of Recycling
Technologies, Faculty of Materials, Metallurgy and Recycling, Technical University of
Kosice. He completed his PhD in 2010 a habilitation in 2014 at Technical University of
Kosice, Slovakia in field Environmental Engineering. His scientific and research activities
are focused on treatment of industrial as well as municipal wastes. His educational
activities are focused on secondary raw materials, hydrometallurgical processes and
production of precious and rare metals. He is a co-author of 22 scientific international
publications and has more than 100 citations mostly in CC journals and his H-index is 5.
e:
dusan.orac@tuke.skDusan Orac et al.
, Toxicology 2018 & Recycling 2018, Volume 2
DOI: 10.4066/2630-4570-C1-002