Abstract

LOZANO-ALVAREZ, Juan Antonio et al. J. Mex. Chem. Soc [online]. 2015, vol.59, n.3, pp.215-228. ISSN 1870-249X.

The interaction of Alginic acid with three direct dyes (Direct blue 1, Direct red 81, and Direct black 22) was studied. It was found that as a result of this interaction formation of adducts after addition of calcium ion, facilitates their removal from aqueous solution. Our results suggest a relationship among physico-chemical properties of each dye and its removal efficiency. The main mechanisms involved in dye removal are electrostatic interactions, hydrogen bonding and hydrophobic interactions.

Keywords : Alginic acid; direct dyes; electrostatic interactions; hydrogen bonding; hydrophobic interactions.

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