Metal element-based adsorbents for phosphorus capture: Chaperone effect, performance and mechanism
Xin Sheng1, Shengnan Chen1, Zhiwei Zhao1
1Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing, 400045, PR China.
Metal adsorbents effectively remove phosphorus (P) from water by forming chemical bonds, addressing eutrophication and resource recovery. This review explores their structure-effect relationships for optimized P removal and utilization.
Area of Science:
- Environmental chemistry
- Materials science
- Chemical engineering
Background:
- Excessive phosphorus (P) in water bodies causes eutrophication.
- Ineffective P recovery mechanisms create supply-demand issues for this vital resource.
- Simultaneous P contaminant reduction and recycling systems are crucial.
Purpose of the Study:
- To review the structure-effect relationship of metal element-based adsorbents for phosphorus removal.
- To explore optimization strategies for P removal properties.
- To discuss the mechanisms of adsorption capacity and targeting.
Main Methods:
- Review of metal (hydro) oxides, layered double hydroxides (LDHs), and metal-organic frameworks (MOFs).
- Analysis of the metal-P chemical bond formation.
- Investigation of surface activity and pore structure effects on adsorption.
Main Results:
- Metal-based adsorbents utilize Lewis acid-base interactions for P binding.
- Adsorbent structure, metal type, surface activity, and pore structure influence P removal efficiency.
- Mechanisms for high adsorption capacity and targeted P removal are elucidated.
Conclusions:
- Metal element-based adsorbents show promise for P removal and recycling.
- Further research is needed for precise material control, large-scale production, and effective P utilization.
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