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The seed extracts of Moringa oleifera has been studied as alternative coagulating agent to chemicals commonly used in order to minimize costs while reducing environmental impacts and human health arising from traditional processes of wastewater treatment. This work studied the performance of the aqueous extract of Moringa oleifera seed in the removal of four different types of textile dyes classified as dispersed, acidic, basic and reactive. Studies with aqueous and saline solutions were performed aiming to improve performance in the removal of textile dyes, and stability testing on the storage time of the extract of Moringa oleifera. Studies were performed using spectrophotometric analysis by means of calibration curves of textile dyes in an aqueous medium.The results showed that the seed extract of Moringa oleifera was quite efficient in the removal of textile dyes, except for the cationic type. Regarding the behavior of textile dyes in aqueous solution and the saline extract were not found significant differences in terms of removal. Other promising results were obtained to evaluate coagulant activity of the extract up to three days storage at room temperature. This fact is important from the operational aspect arising from the use of the extract on a large scale: the possibility to prepare a larger amount of extract, without loss of coagulant activity may enable the utilization of this resource.

Uso de sementes de Moringa Oleífera (LAM) no tratamento de efluente têxtil