Adsorption of AuCl-4 by kaolinites; effect of pH, temperature and kaolinite crystallinity

Adsorption of AuCl-4 by kaolinites; effect of pH, temperature and kaolinite crystallinity

Adsorption of the AuCl4- complex by kaolinites of different crystallinities (Kao-1 and Kao-2) from 100 mL of AuCl3·HCl·4H2O solutions containing 10,000, 500 and 50 µg/L Au and 1 g of kaolinite was measured at pH 3 to 9 at ambient temperature and 120°C. Adsorption from the 50,500 and 10,000 µg Au/L s...

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Veröffentlicht in:Clays and clay minerals 2003-10, Vol.51 (5), p.493-501
Hauptverfasser: Hong Hanlie, Hong Hanlie, Zun Zhenya, Zun Zhenya, Fu Zhengyi, Fu Zhengyi, Min Xinmin, Min Xinmin
Format: Artikel
Sprache:eng
Schlagworte:
adsorption
chemical properties
chemical reactions
clay mineralogy
clay minerals
complexing
crystallinity
effects
experimental studies
geochemistry
isotherms
kaolinite
rock, sediment, soil
sed rocks, sediments
Sedimentary petrology
sheet silicates
silicates
TEM data
temperature
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Zusammenfassung:Adsorption of the AuCl4- complex by kaolinites of different crystallinities (Kao-1 and Kao-2) from 100 mL of AuCl3·HCl·4H2O solutions containing 10,000, 500 and 50 µg/L Au and 1 g of kaolinite was measured at pH 3 to 9 at ambient temperature and 120°C. Adsorption from the 50,500 and 10,000 µg Au/L solutions ranged from 64 to 100% at ambient temperature and from 68 to 100% at 120°C for both kaolinites. Adsorption was pH dependent with a maximum at pH
ISSN:0009-8604
1552-8367
DOI:10.1346/CCMN.2003.0510503