Removal of Pb(II), Fe(II) and Zn(II) using activated carbon produced from foxtail palm fruit chemically activated by KOH and H3PO4. JTRSS [Internet]. 2019 May 27 [cited 2025 Aug. 22];7(1):19-22. Available from: https://journal.umk.edu.my/index.php/jtrss/article/view/501