Potencial coagulante das sementes de Macrolobium acaciifolium (Benth.) Benth. e Inga nobilis Willd. para o tratamento de água

Abstract

To evaluate and confirm the efficiency or inefficiency of organic coagulants as an alternative in the coagulation process and subsequent comparison of treated water with potability standards, seeds of Macrolobium acaccifolium and Inga nobilis species were tested. Using the Jar test equipment, coagulation / flocculation assays were performed to clarify the water and subsequently the color, turbidity, UV254, UV272 and pH parameters were measured with the treated water samples. From the analyzes, the results were presented from the triplicate average, where for Inga nobilis seed using Treatment 2, an efficiency of 14.81% in color removal was obtained; 51.28% turbidity removal efficiency; pH remained within the range between 6 and 8, being within the established standard, but using more than 150ml of coagulant in Treatment 4, the pH was non-standard, as it remained at an average of 5; and using Treatment 3, approximately 607.01 mg / l of organic matter was found in water, and it can be assumed that the addition of coagulant added more organic matter in water during treatment. For Macrolobium acaciifolium seed, using Treatment 3, an efficiency of 39.33% in color removal was obtained; 78.72% turbidity removal efficiency; mean absorbance of 0.111 nm; and presented the best results with approximately an average of 30.38 mg / l of organic matter present in the water, whereas the worst results were presented using Treatments 1 and 2, with an average of 616.62 mg / l of organic matter, being ineffective due to the large amount of dissolved organic matter. Therefore, it can be concluded that the coagulant extracted from Macrolobium acaciifolium was more effective compared to the coagulant extracted from Inga nobilis. However, treated water cannot be considered as potable water as it is out of potability standards.