Al- Abachi, Mouayad Q, Nagam S Al- Awady, and Ahmed M Al-Anbakey. 2013. “Evaluation of Poly Acrylic Acid(PAA) Hydrogel Beads As Adsorbent for The Removal of Lead(II)ion from Water”. Al-Nahrain Journal of Science 16 (3): 30-39. https://mail.anjs.edu.iq/index.php/anjs/article/view/573.