Phosphorus immobilization in water and sediment using iron-based materials: A review

As an essential element for life, phosphorus (P) is very important for organisms. However, excessive Pin water and sediment can cause eutrophication, which poses a potential risk to drinking water safety and the sustainability of aquatic ecosystems. Therefore, effective phosphorus-control in water and sediment is the key strategy to control eutrophication. Iron-based materials exhibit high efficiency for P immobilization due to their strong affinity with P. low cost, easy availability, and environmentally friendliness. They are promising materials for controlling P in application. This work comprehensively summarizes the recent advances on P immobilization in water and sediment by different iron-based materials, including iron (hydr)ox ides, iron salts. zero-valent iron and iron-loaded materials. This review is focused on the mechanism of the processes and how they are impacted by major influencing factors. The combination of iron-containing materials with other assisting materials is a good strategy to enhance P-fixation efficiency and selectivity. Finally, the current challenges and prospects of P-control technologies based on iron-containing materials are proposed. This review provides a systemic theoretical and experimental foundation for P-immobilization in water and sediment using iron-based materials. (C) 2020 Elsevier B.V. All rights reserved.

Automated summary

Excessive phosphorus in water and sediment can lead to eutrophication, posing potential risks to drinking water safety and aquatic ecosystem sustainability. Iron-based materials show high efficiency in phosphorus immobilization due to their strong affinity with phosphorus, low cost, easy availability, and environmentally friendly properties. Combining iron-containing materials with other assisting materials is a good strategy to enhance phosphorus fixation efficiency and selectivity.