Synthesis of Magnetic Eggshell Modified with Polyethyleneimine for Aspirin Removal

Abstract

The application of domestic waste as an economical and eco-friendly adsorbent has emerged among the most promising options for pharmaceutical remediation due to its high performance. Nonetheless, one of the most significant challenges of modified adsorbents is the difficulty in their recovery process, which includes separating adsorbents from cleaned water. This study synthesized and investigated a magnetic adsorbent derived from chicken eggshell (CE) modified with polyethyleneimine (PEI) for aspirin removal to address this issue. The chosen variables for the adsorbent synthesized were the ratio of CE:PEI (1:1, 1:2, 2:1, 2:0.5), the ratio of CE-PEI: magnet powder (2:1:2, 2:1:1, 2:1:0.5, 2:1:0.25). Adsorption studies were carried out to remove 0.1 g/l of aspirin. The results indicated that the optimal synthesis conditions for the magnetic chicken eggshell modified with polyethyleneimine (MCEP) are 2:1 for CE: PEI ratio, 2:1:1 ratio for CE-PEI to magnet particles and 120 minutes of crosslinking time.