The concern with water quality must go beyond surface water, the quality of groundwater must be
widely discussed, since there are populations that use this resource as the only source of supply. In view of this, the water may suffer contamination, which negatively interferes with the water quality. An
alternative method that can be used to remove contaminants from water is biosorption, which has
characteristics such as efficiency, sustainable treatment and low cost. In this context, the present work
aims to use the banana peel biomass (Musa ssp.) in the treatment of water from a tubular well, collected in the municipality of Itacoatiara-AM in the Quilombola community Sagrado Coração de Jesus - Lago do Serpa. To evaluate the adsorption of the biomass, the samples were analyzed before and after treatment with the biomass to identify changes in the concentrations of the investigated analytes. The banana peel underwent pre-treatment with distilled water for pulping, followed by drying in an oven,
obtaining a dry material which was crushed in a blender and sieved through granulometric stainless steel sieves, 250µm of 32mesh. Performing a thermal treatment on the sample, to identify the adsorption potential and biomass (0.1, 0.25, 0.5 and 1.0g) was used in 10mL for the methylene blue dye solution in concentrations (10, 25 , 50 and 100 mg.L-1) evaluating at different times. Performing the adsorption reading of the solutions, at a wavelength of 645nm, using a UV-Vis spectrophotometer. For physical chemical parameters (pH, electrical conductivity, temperature, turbidity, salinity, suspended solids, total suspended solids, apparent color, real color, nitrite, nitrate, ammonia and phosphate), and
microbiological parameters (coliforms and Escherichia coli). The obtained data demonstrated that the
biomass presents adsorptive capacity when methylene blue dye was used as adsorbate. In solution, it
was observed that the biomass releases saponins and tannins, giving a yellow color to the sample. The
data of the physical-chemical parameters were compared with those presented in Ordinance No 888/21
which regulates potability standards. Among the physical-chemical parameters analyzed for treated
water, those that did not meet the legislation were ammonia, nitrite and apparent color. The results of
the analyzes showed the presence of coliforms and E.coli. for the raw sample. According to the results
obtained, both the raw water and the treated water are unfit for human consumption.
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