Resumo

SERNAQUE AUCCAHUASI, Fernando Antonio; REYNA MANDUJANO, Samuel Carlos  e  HINOJOSA PEDRAZA, Karina Ines. Effectiveness of chitosan and biochar treatments on Chromium VI, Boron and aluminum. Rev. Inv. Cs. Agro. y Vet. [online]. 2025, vol.9, n.26, pp.856-870.  Epub 05-Maio-2025. ISSN 2664-0902.  https://doi.org/10.33996/revistaalfa.v9i26.386.

The present study aimed to evaluate the effectiveness of chitosan and biochar treatments on the metals chromium VI, boron, and aluminum in aqueous solution. A three-replicate treatment was carried out, varying the pH (3, 7, 11), dosage (0.1, 0.5, 1), and contact time in minutes (45, 80, 120). The efficiencies of chitosan and biochar were found to be significant. In the case of chromium VI, the initial concentration of 31.8235 g/L was reduced by biochar to 21.69 g/L, while chitosan was able to reduce the concentration to 18.68 g/L. For boron, the initial concentration was 21.9246 g/L. Biochar was able to reduce this concentration to 11.42 g/L. In contrast, chitosan was able to reduce the concentration to 8.07 g/L. Finally, in the case of aluminum, the initial concentration was 29.3318 g/L. Biochar managed to reduce this concentration to 21.03 g/L and chitosan managed to reduce the concentration to 10.61 g/L. The results of the conditions that optimize the effectiveness of chitosan and biochar were at pH 7 at a biochar dose ranging between 0.5-1 g/L, while the chitosan dose ranged between 0.1-1 g/L. Likewise, it has been found that the optimal contact time is in the range of 45-120 minutes. Finally, natural adsorbents proved to be effective in the removal of chromium VI, boron and aluminum; in the case of chromium VI, biochar achieves a maximum efficiency of 31.839 %, chitosan reaches an efficiency of 42.905 %.

Palavras-chave : Chitosan; Biochar; Chromium VI; Boron; Aluminum.

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