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Cadmium and zinc adsorption onto activated carbon: Influence of temperature, pH and metal/carbon ratio
Author(s) -
Marzal Paula,
Seco Aurora,
Gabaldón Carmen,
Ferrer José
Publication year - 1996
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/(sici)1097-4660(199607)66:3<279::aid-jctb506>3.0.co;2-k
Subject(s) - cadmium , zinc , adsorption , chemistry , metal , activated carbon , inorganic chemistry , carbon fibers , molar ratio , materials science , organic chemistry , catalysis , composite material , composite number
The adsorption characteristics of cadmium and zinc onto a granular activated carbon were studied. Cadmium and zinc removals increased on raising pH and temperature, and decreased on raising the molar metal/carbon ratio. The adsorption processes were modelled using the surface complex formation (SCF) Triple Layer Model (TLM) with an overall bidentate species. A dependence of the SCF constant on pH, the molar metal/carbon ratio and temperature was observed, and a correlation for log K ads was determined. The SCF model successfully predicted cadmium and zinc removals.