Resumen

VASQUES, Andressa Regina et al. Adsorption of dyes RO16, RR2 and RR141 using residual sludge of textile industry. Eng. Sanit. Ambient. [online]. 2011, vol.16, n.3, pp. 245-252. ISSN 1413-4152.  http://dx.doi.org/10.1590/S1413-41522011000300007.

The adsorption is one of the techniques that have been successfully used for effective removal of the dyes present in textile effluents. With the objective to evaluate the different adsorptive parameters, as well as determining the efficiency of one alternative adsorbent in the removal of dyes, kinetics and equilibrium data of adsorption were determined. By the kinetic data and of equilibrium, it was verified that the adsorption was favorable for all the dyes in 25ºC, being the best condition for the dye RO16 and RR2 in the total absence of salt. For the dye RR141, the addition of NaCl increased the adsorption capacity of adsorbent in the equilibrium and the addition of Na₂SO₄ favored the adsorption for the dye RO16, in contrast to what was observed for the two other dyes. The maximum quantity of dye adsorbed per unit mass of adsorbent (q_max) in the best adsorptive conditions for the dyes RO16, RR2 and RR141 was of 81.30, 53.48 and 78.74 mg.g^-1 respectively.

Palabras llave : adsorption; dyes; salts; textile industry; residual textile sludge.