Journal
FRONTIERS IN MATERIALS
Volume 9, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fmats.2022.1007485
Keywords
phosphate; ammonium; eutrophication; titanium oxide nanocomposites; zeolite
Categories
Funding
- Deanship of Scientific Research at Umm Al-Qura University [PNURSP2022R134]
- King Khalid University
- Research Center for Advanced Materials Science (RCAMS) at King Khalid University, Saudi Arabia - Princess Nourah bint Abdulrahman University Researchers Supporting Project
- Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
- [22UQU4320141DSR18]
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This study focused on the simultaneous removal of phosphate and ammonium ions from aqueous solutions using titanium oxide nanoparticles dispersed on zeolite. The nanocomposites showed high removal efficiency and stability, making them a viable and efficient method for combating eutrophication in freshwater bodies.
In the modern era, problems like eutrophication caused by increased nutrients such as ammonia and phosphorous in freshwater bodies have become the cause of freshwater ecosystem deterioration. To save freshwater by reducing eutrophication, new cost-effective strategies and methods are urgently needed. In this study, titanium oxide nanoparticles dispersed on zeolite were chemically synthesized for the simultaneous removal of phosphate and ammonium ions from aqueous solutions. SEM and XRD analysis were used to characterize the synthesized TiO2/zeolite nanocomposites, which revealed that the synthesized material was more stable and dispersed than zeolite. The nanocomposites removed 38.8% NH4 (+) and 98.1% PO4 (3-) from an initial concentration of both ions of 20 mg 100 ml(-1). The removal of both ions was investigated under various conditions including different concentrations of nanocomposites, initial concentration of the solution, temperature, time, and pH. The maximum adsorption of nanocomposites for PO4 (3-) was 38.63 mg g(-1) at optimal conditions, and 3.75 mg g(-1) for NH4 (+). Kinematics studies showed that both the ions were adsorbed by a pseudo-second-order model. Ion chemisorption occurred as a result of ligand exchange or electrostatic adsorption between ions and nanocomposites. Overall, it was determined that this strategy is a viable and efficient method for simultaneously removing both ions (anionic phosphate and cationic ammonium) from eutrophic waters.
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