Resumo

ZULUAGA DIAZ, Benjamín; HORMAZA ANAGUANO, Angelina; BELTRAN PEREZ, Óscar Darío  e  CARDONA GALLO, Santiago Alonso. STATISTICAL DESIGN FOR THE REMOVAL OF BASIC RED 46 USING REGENERATED FULLER EARTH AS AN ALTERNATIVE MATERIAL. Rev.EIA.Esc.Ing.Antioq [online]. 2014, n.22, pp.93-102. ISSN 1794-1237.

Several non-conventional materials have been evaluated in recent years as adsorbents for the treatment of colored effluents from the textile industry. Fuller's earth (TF) which is composed of various minerals has shown a high capacity for removal of different cationic dyes, however the basic red 46 (RB46) widely used in dyeing processes, has not been studied on this material. In this research were evaluated the best conditions to achieve the higher removal of RB46 on TF through a statistical design of experiments under batch system. The analyzed variables were adsorbent dosage, dye concentration and contact time. The final concentration of the dye was quantified by UV-Vis spectrophotometry. A factorial design 2³ and its further optimization through a central composite surface design allowed to achieve a maximum removal of 99.07% at a concentration of 35,0 mgL^-1, a dosage of 1,1 gL^-1 and a contact time of 8 h with an adjusted correlation coefficient of 96.79%. TF is an excellent material for the removal of RB46 since it requires a lower dosage for high concentrations of the dye compared with those reported for other adsorbents.

Palavras-chave : Adsorption; Factorial Design; Basic Red 46; Regenerated Fuller Earth; Central Composite Surface Design.

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