Remoção De Corantes Têxteis Por Coagulação-Floculação-Sedimentação E Adsorção

Abstract

Textile effluents when discharged into water bodies without proper treatment cause damage to the water quality of the receiving bodies, mainly due to the large amount of dyes used for dyeing tissues, being necessary to conduct research aiming to improve the treatment efficiency of these effluents. Thus, the objective of this work wasto assessthe removal of pigments Copper phthalocyanine,naphthol monoazole, diaxazine and diazotic, by testbench. For this, the synthetic effluent with pigment dispersion of Copper phthalocyanine was prepared, and the treatments used were coagulation-flocculation and sedimentation using polyaluminium hydroxychloride as coagulant, followed by fixed bed adsorption and the treatment efficiency was measuredthe following parameters: pH, conductivity, turbidity and pigment concentration. The results indicated the best coagulation condition with in pH of 7.41 and 10 mg.L-1dosage of coagulant resulting in 95.0% turbidity and 90.0% color removal. The best adsorbent, CAG 01,for adsorption sampled in this work presented Methylene blue index of 328.12 mg.g-1 and adsorption capacity in equilibrium equal44.57 mg g-1. Coagulation-flocculation and sedimentation treatment removed 75.29% of the pigments and withadsorption treatment, the removal of the pigments reached 97.30%.