Choi, J.-W. Lee, S.-H. 2024-02-21T06:30:21Z 2024-02-21T06:30:21Z 2018-06 9789811080319 0000-0000 https://pubs.kist.re.kr/handle/201004/149277 To remove phosphate (P i ) from wastewater, a novel, low-cost adsorbent was developed by immobilizing copper ions (Cu2+) on a naturally available biopolymer chitosan. The copper ions bound to chitosan through its complex formation with the amino and hydroxyl groups in the polymer chain. This complex formation could reduce the size of the hydrogels and thus increase the density of the natural biopolymer. The chelating interaction between nitrogen and copper enabled the intra- and inter-molecular cross-linking, thereby improving the physical and chemical stability of the polymeric ligand exchanger. Most importantly, Cu 2+ ions could serve as the active functional group for Pi removal from aqueous solution. The polymeric ligand exchanger displayed a greater affinity with P i rather than sulfate due to the electrostatic and Lewis acid/base interactions between immobilized Cu 2+ and P i , regardless of the solution pH. Batch adsorption experiments showed that the polymeric ligand exchanger had the maximum capacity of approximately 85 mg/g in Pi solutions. The polymeric ligand exchanger could also be applied to a fixed-bed column reactor, demonstrating the high performance on the Pi removal from aqueous solutions. ？ Springer Nature Singapore Pte Ltd. 2019. 526 ENG Springer Singapore Phosphate separation from aqueous solution using a chitosan-based biodegradable ion exchanger Book 10.1007/978-981-10-8031-9_33 483 496 Phosphorus recovery and recycling 저서 TRUE