Characteristic study of adsorption of chromate anion from electrolytic solution on alumina

Abstract

The adsorption isotherms of chromate (CrO42-) from electrolytic solution (0.01M NaCl) on Al2O3 were determine at various pH (2-10) and concns. Max. adsorption occurs at pH u4.5. Adsorption of chromate decreases to 0 near the PZC (pH 9). The presence of some anions tends to decrease chromate adsorption. The order is citrate > PO43- > SO42- > NO3-. The presence of some cation tends to increase chromate adsorption. The order is Ba2+ > Ni2+ > K+. Chromate adsorption is not influenced by temperature These results are explained and the adsorption mechanism is discussed.

Key words: ALUMINIUM OXIDE, ADSORPTION, ION EXCHANGING, CHROMATE P, ELECTROLYTE, SURFACE ACTIVITY, ANION

CLC Number:

O614
O647

Cite this article

MU GUANNAN;HOU XIUYING. Characteristic study of adsorption of chromate anion from electrolytic solution on alumina[J]. Acta Chimica Sinica, 1988, 46(2): 172-175.

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Al2O3自电解质溶液中吸附CrO4^2^-的特性研究