Akademik Veri Yönetim Sistemi
5th Eurasian Waste Management Symposium (EWMS), İstanbul, Türkiye, 26 - 28 Ekim 2020, ss.212-215, (Tam Metin Bildiri)
Adsorption of phosphate and ammonium ions on synthesized bare and composite (activated carbon-magnetite) forms of magnetite was performed using batch experiments. Magnetic nanoparticles' characterization was done with XRD, EDX, SEM and FTIR measurements. Both of cationic (NH4+) and anionic (PO4-3) nutrients' recovery was able to be achieved by bare magnetite (B-MNPs), ranging between 0.1-15.8 mg/g and 1.6-21.8 mg/g, respectively. The cationic ammonium nutrient was able be adsorbed with smaller amounts, as the initial pH was acidic (similar to 3.5) causing positively charged surface of MNPs, thus mitigating NH4+ adsorption possibility. Conversely, the amount of the adsorption of anionic phosphate nutrient was found to increase with the similar low pH values. The adsorption experiments done with composite form of MNPs (AC-MNP) for PO4-3 ions resulted also with a lower adsorption capacity which ranged between 0.7-8.7 mg/g. The reason is likely that activated carbon having bigger pore sizes may have poorly coated with iron oxide nanoparticles and therefore phosphate could be poorly adsorbed.