@article{martins_oliveira_figueredo_lima_cantanhede_2026,  title={Preparation, Characterization, and Application of Tucum Activated Carbon (<i>Astrocaryum vulgare</i> Mart.) for Ca<sup>2+</sup> Removal from Aqueous Solutions},  volume={37},  ISSN={0103-5053},  url={https://doi.org/10.21577/0103-5053.20260127},  DOI={10.21577/0103-5053.20260127},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Martins, Walinson F. and Oliveira, Ângelo A. S. de and Figueredo, Gilvan P. de and Lima, Joacy B. de and Cantanhede, Leonardo B.},  year={2026},  pages={e–20260127} }