JIANG Qi,CEN Yu-hua,ZHU Yue,et al.Deep Removal of Phosphate in Wastewater by Resin-based Hydrated Cerium Oxide Composite[J].China Water & Wastewater,2021,37(3 3):99-103.
Deep Removal of Phosphate in Wastewater by Resin-based Hydrated Cerium Oxide Composite
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
3 3
Page:
99-103
Column:
Date of publication:
2021-02-01
- Abstract:
- Hydrated cerium oxide (HCO) nanoparticles were loaded into strong-base anion exchanger (SAE) through the process of “precursor lead-in and in-situ deposition”, and a composite nano adsorbent HCO@SAE was prepared and used for deep removal of phosphate in wastewater. HCO@SAE exhibited the best phosphate removal performance as compared to its host materials: SAE, powder activated carbon (PAC) and macroporous polystyrene resin (XAD-4). The pH value of the solution had a great influence on phosphate adsorption performance of HCO@SAE, and the maximum phosphate adsorption capacity (30.96 mgP/g) could be obtained at neutral pH. Benefiting from the inner-sphere complexation between phosphate and the loaded HCO nanoparticles, HCO@SAE was capable of selective adsorbing phosphate even coexisting with high levels of other competing anions. More attractively, the exhausted HCO@SAE could be effectively regenerated by using NaOH-NaCl binary solution as the desorbent. After regeneration, its adsorption performance remained stable, thus realizing multi-batch cyclic adsorption operation.
Last Update:
2021-02-01