Utilization Of Hydroxyapatite From Catfish Bones as an Adsorbent For Copper (Cu(II)) Ions. EKSAKTA [Internet]. 2026 Oct. 28 [cited 2026 Oct. 29];27(05):932-44. Available from: https://eksakta.ppj.unp.ac.id/index.php/eksakta/article/view/680