Implementation of Freundlich Equation Absorption of Calcium and Magnesium Ions on Saturated Salt Solution. Nusantara Science and Technology Proceedings, Malang, Indonesia, p. 242–248, 2019. Disponível em: https://nstproceeding.com/index.php/nuscientech/article/view/107. Acesso em: 24 apr. 2025.