RONNY, Ronny; IRFAI, Irfai; MAHYUDIN, Dedi; JASMAN, Jasman. Banana Stem Charcoal as Adsorbents Reduce Water Hardness Levels. International Journal of Environment, Engineering and Education, [S. l.], v. 1, n. 1, p. 1–6, 2019. DOI: 10.55151/ijeedu.v1i1.7. Disponível em: https://ijeedu.com/index.php/ijeedu/article/view/7. Acesso em: 24 may. 2025.