Adsorption of itaconic acid from aqueous solutions onto alumina | Zendy

Jelena Gulicovski | Zendy; Ljiljana S. Čerović | Zendy; S.K. Milonjić | Zendy; Ivanka G. Popović | Zendy

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Adsorption of itaconic acid from aqueous solutions onto alumina

Author(s) -

Jelena Gulicovski,

Ljiljana S. Čerović,

S.K. Milonjić,

Ivanka G. Popović

Publication year - 2008

Publication title -

journal of the serbian chemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.227

H-Index - 45

eISSN - 1820-7421

pISSN - 0352-5139

DOI - 10.2298/jsc0809825g

Subject(s) - itaconic acid , adsorption , point of zero charge , aqueous solution , flocculation , chemistry , surface charge , dissociation (chemistry) , inorganic chemistry , chemical engineering , polymer , organic chemistry , engineering , copolymer

Itaconic acid, IA (C5H6O4), was investigated as a potential flocculant for the aqueous processing of alumina powders. The adsorption of IA, as a function of its concentration and pH value of the solution, onto the alumina surface was studied by the solution depletion method. The stability of the sus- pensions in the presence of itaconic acid was evaluated in light of the surface charge of the alumina powder used, the degree of dissociation of IA, as well as the sedimentation behavior and rheology of the suspensions. It was found that the adsorption process is extremely pH dependent; the maximum adsorption of IA onto alumina surface occurring at a pH close to the value of the first IA dis- sociation constant, pKa1. Also, IA does not influence the value of the point of zero charge of alumina. It was shown that IA represents an efficient flocculant for concentrated acidic alumina suspensions.

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