『Abstract
　An excess of phosphorite (P) is the most common cause of eutrophication of freshwater bodies. Thus, it is imperative to reduce the concentration of P to prevent harmful algal blooms. Moreover, recovery of P has been gaining importance because its natural source will be exhausted in the near future. Therefore, the present work investigated the removal and recovery of phosphate from water using a newly developed hybrid nanocomposite containing aluminum nanoparticles (HPN). The HPN-Pr removes 0.80±0.01 mg P/g in a pH interval between 2.0 and 6.5. The adsorption mechanism was described by a Freundlich adsorption model. The material presented good selectivity for phosphate and can be regenerated using an HCl dilute solution. The factors that contribute most to the attractiveness of HPN-Pr as a phosphate sorbent are its moderate removal capacity, feasible production at industrial scale, reuse after regeneration and recovery of phosphate.

Keywords: Eutrophication; Phosphorus removal; Hybrid nanocomposites; Aluminum』

1. Introduction
2. Materials and methods
　2.1. Materials and HPN synthesis
　2.2. Reaction extension and chemical properties of the HPNs
　　2.2.1. Reaction extension
　　2.2.2. Zero point charge
　2.3. Phosphate removal
　　2.3.1. Effect of pH on phosphate removal by HPNs
　　2.3.2. Removal capacity of phosphorus by HPNs
　　2.3.3. Phosphate adsorption isotherm on HPN-Pr
　　2.3.4. Column test
　2.4. Regeneration and recovery study
3. Results and discussion
　3.1. Chemical properties
　3.2. P removal
　　3.2.1. Effect of pH on phosphate removal
　　3.2.2. Removal of phosphorus by HPNs
　　3.2.3. P adsorption isotherm on HPN-Pr
　　3.2.4. Column test
　3.3. Regeneration study
4. Conclusions
Acknowledgments
References