Open AccessActivated Clay as an Adsorbent for Cationic Dyestuffs
Author(s) -
Mohammad S. El-Geundi,
Hamdy M. Ismail,
K.M.E. Attyia
Publication year - 1995
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 - 10.1177/026361749501200203
Subject(s) - adsorption , chemistry , cationic polymerization , aqueous solution , surface charge , bet theory , nuclear chemistry , chemical engineering , inorganic chemistry , organic chemistry , engineering
The adsorption of cationic dyestuffs (Basic Blue 69 and Basic Red 22) from aqueous solution by natural and activated clays has been investigated. The maximum adsorption capacity (q max ) of BB 69 and BR 22 on to natural clay was 390 mg/g and 365 mg/g, respectively. The natural clay was treated with H 2 O 2 and HCl to enhance its adsorption capacity for dyestuffs. The efficiency of activation with H 2 O 2 was greater by a factor of 23% and 13% in the case of BB 69 and BR 22, respectively, when compared with natural clay. The efficiency of activation with HCl was superior by 30% and 16% in the case of BB 69 and BR 22, respectively, relative to natural clay. The adsorption capacity has been correlated with the pore structure and the surface charge. The results obtained show that the adsorption capacity is independent of the S BET values but depends on the surface charge.