Synthesis of iron-modified montmorillonite/Al2O3 composite adsorbents and their phosphorus adsorption performance study DOI
Kexin Xie, Jiacheng Xie, Zhenxiang Zhao

и другие.

Research Square (Research Square), Год журнала: 2025, Номер unknown

Опубликована: Апрель 25, 2025

Abstract The presence of excessive phosphate in aquatic systems can trigger eutrophication processes, causing detrimental impacts on ecological balance. This research developed an innovative phosphorus-adsorbing composite material through iron-modified montmorillonite integrated with Al2O3, synthesized via surface modification coupled hydrothermal calcination (Fe/AlPMt), for phosphorus management. pH optimization experiments demonstrated Fe/AlPMt's effective removal capability across extended acidic range (pH 3.0–6.0). displayed superior selectivity compared to competing anions. Kinetic analysis revealed that the adsorption process conformed a second-order reaction model, particle internal diffusion identified as dominant mechanism. Equilibrium studies indicated satisfactory alignment both Freundlich and Tempkin isotherm models adsorption. Field testing lake water achieved remarkable 99% elimination at 0.3 g/L dosage. Adsorption mechanisms involved multiple pathways: electrostatic attraction, ligand substitution reactions, precipitate formation surfaces. maintained 95.8% efficiency after five regeneration cycles, demonstrating robust recyclability. These results position Fe/AlPMt viable solution phosphorus-contaminated wastewater remediation.

Язык: Английский

Effect of straw biochar magnesium lanthanum hydrotalcite on phosphorus recovery from acidified biogas slurry DOI

Yanru Ma,

Yujun Shen,

Hongsheng Cheng

и другие.

Research Square (Research Square), Год журнала: 2025, Номер unknown

Опубликована: Апрель 25, 2025

Abstract Biogas slurry is rich in phosphorus and serves as an important source for recovery. To improve the efficiency of recovery from biogas strengthen process, H2SO4 used acidification pretreatment slurry. However, primary mechanism underlying acidified remains unclear. In this study, effects different conditions on transformation forms physicochemical properties well effect a straw charcoal magnesium–lanthanum hydrotalcite composite material (6YBC-LDO) were investigated. The results showed that soluble orthophosphate (Ortho-P) was main form recovered by 6YBC-LDO adsorbent. When added to adjust pH 6.0, 6.5, 7.0, mass concentration Ortho-P increased factor 20, 9, 4, respectively, compared with original total rates at 7.0 150.99, 144.73, 40.32 mg/g, 64%, 85%, 99%, respectively. affecting Acidification significantly affected products treated 7 mainly phosphate complexes higher purity. High purity materials could be efficient fertilizers production future, which has great market application potential.

Язык: Английский

Процитировано

0
Synthesis of iron-modified montmorillonite/Al2O3 composite adsorbents and their phosphorus adsorption performance study DOI
Kexin Xie, Jiacheng Xie, Zhenxiang Zhao

и другие.

Research Square (Research Square), Год журнала: 2025, Номер unknown

Опубликована: Апрель 25, 2025

Abstract The presence of excessive phosphate in aquatic systems can trigger eutrophication processes, causing detrimental impacts on ecological balance. This research developed an innovative phosphorus-adsorbing composite material through iron-modified montmorillonite integrated with Al2O3, synthesized via surface modification coupled hydrothermal calcination (Fe/AlPMt), for phosphorus management. pH optimization experiments demonstrated Fe/AlPMt's effective removal capability across extended acidic range (pH 3.0–6.0). displayed superior selectivity compared to competing anions. Kinetic analysis revealed that the adsorption process conformed a second-order reaction model, particle internal diffusion identified as dominant mechanism. Equilibrium studies indicated satisfactory alignment both Freundlich and Tempkin isotherm models adsorption. Field testing lake water achieved remarkable 99% elimination at 0.3 g/L dosage. Adsorption mechanisms involved multiple pathways: electrostatic attraction, ligand substitution reactions, precipitate formation surfaces. maintained 95.8% efficiency after five regeneration cycles, demonstrating robust recyclability. These results position Fe/AlPMt viable solution phosphorus-contaminated wastewater remediation.

Язык: Английский

Процитировано

0