Treatment of acidic dyes solutions by adsorption in soybean meal - doi: 10.4025/actascitechnol.v34i1.10434

Luana Marcele Chiarello, Ivonete Oliveira Barcellos, Gabriela Spengler, Davi Eduardo Roza


In this study, we tested the potential use of a natural sorbent based on soybean meal from oil extraction in the treatment of solutions containing the acid dyes: yellow Erionyl RXL, navy blue Erionyl R and red Erionyl A-3B, used to dye polyamide fibers. To that end, adsorption studies were performed under different conditions of temperature, adsorbent concentrations, pH values, and color mixes (two- and three-color) on dye solutions produced in laboratory. Soybean meal showed great ability to remove color, especially in solutions with pH 4 and 6 at 60°C and containing 10 g L-1 of adsorbent. Considering that values of adsorption efficiency ranged between 74 and 99%, depending on the dye and treatment conditions, soybean meal proved to be an alternative material for the adsorption of acidic dyes.



wastewater treatment; acid textile dyes; soybean meal

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ISSN 1806-2563 (impresso) e ISSN 1807-8664 (on-line) e-mail:


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