Effectiveness of HCl-Activated Duck Eggshell (Anas platyrhynchos domesticus) for Pb²⁺ Removal from Well Water. EKSAKTA [Internet]. 2026 Sep. 29 [cited 2026 Sep. 30];27(05):828-37. Available from: https://eksakta.ppj.unp.ac.id/index.php/eksakta/article/view/722