Biomaterials comprise an important group of low-cost materials and exclusive
properties, which are currently being applied in several technological areas for the
protection and depollution of the environment. The objective of this work was the
production, characterization and application of hydroxyapatite from fish waste from
Santarém (Western region of Para). The selected samples were the residues of tambaqui
spines (Colossoma macropomum), a typical fish of the region and widely consumed by
the population, which were discarded by local sellers. Purification efficiency was
monitored using X-ray diffraction (XRD), infrared spectroscopy (FTIR), thermal analysis
(TG-DSC) and scanning electron microscopy (SEM) techniques. The results revealed that
the raw material contained impurities of an organic nature that were removed after
physical-chemical purification processes such as calcination, filtration and drying, thus
showing that it can be transformed into a value-added product of technological and
environmental interest. The adsorption tests with the pollutant showed a degradation
efficiency close to 70 % in 3 h, thus showing that hydroxyapatite obtained from tambaqui
residues can be used as a cheap source to obtain a cationic organic pollutant adsorbent.
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