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Interaction Between Montmorillonite and Benzidine in Aqueous Solutions I. Adsorption of Benzidine on Montmorillonite
Author(s) -
Lahav N.,
Raziel S.
Publication year - 1971
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1002/ijch.197100096
Subject(s) - benzidine , chemistry , adsorption , montmorillonite , aqueous solution , inorganic chemistry , bentonite , salt (chemistry) , organic chemistry , chemical engineering , engineering
Adsorption of benzidine on montmorillonite (bentonite) particles suspended in aqueous solutions was studied by measuring the absorbance of the solution at 280 nm before and after mixing the two reactants. Benzidine adsorption decreased with an increase of suspension pH from 7 to 9.3. NaCl and calgon (Na‐hexametaphosphate) decreased the adsorption, the latter being more effective at the equivalent concentration. The interaction between benzidine and montmorillonite was connected to cation exchange processes and was influenced by the specific adsorption of the metaphosphate ion on the crystal edges.