Silva AA, Santos HCF. Preparation of iron catalysts supported in biomass arising from the coconut green shell for the falling of methylene blue. Int. J. Geosci., Eng. Technol. [nternet]. 2021 Apr. 30 [cited 2025 Apr. 4];3(1):1-5. vailable from: https://revistas.ufvjm.edu.br/ijget/article/view/427