Synthesis of hydrated ferric oxide on cation exchange resin for phosphate and hardness removal in water

• Published in: IOP conference series. Earth and environmental science Vol. 964; no. 1; pp. 12032 - 12053
• Main Authors: Tran, Le Ba, Nguyen, Trung Thanh, Le, Tri Thich, Nguyen Thi, Quynh Anh, Phan, Phuoc Toan, Padungthon, Surapol, Nguyen, Nhat Huy
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.01.2022
• Subjects: Adsorption; Cation exchange; Cation exchanging; Cationic polymerization; Competitive materials; Dosage; Durability; Ferric oxide; hardness; hydrated iron oxide; ion exchange resins; Ions; pH effects; phosphate adsorption; Reaction time; Regeneration; Resins; Water hardness
• ISSN: 1755-1307; 1755-1315
• DOI: 10.1088/1755-1315/964/1/012032

Abstract In this study, a potential adsorbent was synthesized from iron salt and cation exchange resin (FeOOH@CR) and applied for phosphate adsorption in batch experiments. The characteristics of FeOOH@CR materials before and after phosphate adsorption were determined by FTIR, XRD, and SEM. The factors affecting the adsorption process such as reaction time, solution pH, material dosage, concentration, temperature, and competing ions were tested. Kinetic, thermodynamic and isothermal models of the adsorption process were applied to study the nature of the adsorption process. The properties of phosphate adsorption, effect of competitive ions and material reusability were also examined. Results showed that the adsorption time reached equilibrium after 48 h and the suitable adsorption condition was found at solution pH of 6.5, material dosage of 5 g/L. In addition, the durability of the material after 5 times of regeneration was investigated with the remained adsorption ability of about 55% as compared to the original one.