Open AccessAdsorption of Mercury, Lead and Cadmium Ions on Modified Activated Carbons
Author(s) -
Mohsen M. Mostafa
Publication year - 1997
Publication title -
adsorption science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.682
H-Index - 36
eISSN - 2048-4038
pISSN - 0263-6174
DOI - 10.1177/026361749701500801
Subject(s) - chemistry , adsorption , activated carbon , cadmium , inorganic chemistry , aqueous solution , mercury (programming language) , metal ions in aqueous solution , langmuir , langmuir adsorption model , chloride , zinc , langmuir equation , metal , nuclear chemistry , organic chemistry , computer science , programming language
Steam-activated and zinc chloride-activated carbons were prepared from rice husks. These carbons were modified by treatment with different concentrations of sulphuric acid. The adsorption of Hg 2+ , Pb 2+ and Cd 2+ ions from aqueous solution at 298 K on to these carbons has been investigated. The effect of pH on the adsorption capacity has also been studied. The adsorption isotherms obtained were of the Langmuir type, the application of the Langmuir equation allowing the determination of the adsorption capacities. The chemistry of the carbon surface is a prominent factor which determines the removal capacity for these metal ions. In contrast, the extent of the surface is not a controlling factor in this regard.