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Adsorption of gold‐thiourea complex on activated carbon
Author(s) -
Soto Ana M.,
Machuca Ruth A.
Publication year - 1989
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.280440306
Subject(s) - thiourea , adsorption , sulfuric acid , activated charcoal , activated carbon , chemistry , sulfate , leaching (pedology) , inorganic chemistry , freundlich equation , charcoal , kinetics , nuclear chemistry , carbon fibers , materials science , organic chemistry , environmental science , quantum mechanics , composite number , soil science , composite material , soil water , physics
The adsorption kinetics of the gold‐thiourea complex on activated charcoal was studied. Experimental runs were made in a batch reactor at constant temperatures and stirred by a magnetic system. Samples were taken at different periods of time and were analyzed for gold in a Perkin‐Elmer Model 360 atomic absorption spectrophotometer. The samples were prepared with synthetic solution of gold with thiourea, sulfuric acid, and iron sulfate with concentrations similar to the ones in the leaching process. The gold adsorbed on activated charcoal was 99% at 20°C. The adsorption behavior was characterized by the Freundlich model at different temperatures (20°C, 35°C and 50°C).