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- Title
Synthesis and characterization of zeolite A, Fe<sub>3</sub>O<sub>4</sub>/zeolite A, and Fe<sub>2</sub>O<sub>3</sub>/zeolite A nanocomposites and investigation of their arsenic removal performance.
- Authors
Khatamian, Maasoumeh; Afshar No, Nasim; Hosseini Nami, Shamin; Fazli-Shokouhi, Sara
- Abstract
In this research, zeolite A (Si/Al ratio of 1.57) with cubic morphology was synthesized using Na-clinoptilolite (Si/Al ratio of 5.62) by hydrothermal method. Fe3O4 and Fe2O3 nanoparticles were synthesized and scrutinized using XRD, FT-IR, EDX, and SEM. The Fe3O4 and Fe2O3 nanoparticles were successfully synthesized and proven with characterization methods. The proper temperature for maghemite synthesis was found to be 200 °C. Subsequently, the synthesized nanoparticles were loaded on the surface of the zeolite A. The nanocomposites were investigated and characterized by the techniques mentioned above. 1 wt.%, 3 wt.%, and 7 wt.% of magnetite were used to load in the structure of zeolite A, while only 1% of maghemite was loaded because of its good performance. All samples and their differences were comprehensively studied. Moreover, the dosage of adsorbents was 0.01 g/L and 0.05 g/L for zeolite A and its nanocomposites investigated for removing arsenic. Also, removing arsenic was studied using 0.01 g/L dosage of nano-oxides. 3 wt.% loading of magnetite was found to be the optimum loading. Moreover, zeolite A proved to be ineffective, and 0.01 g/L of nanocomposites was not very efficient in the case of removing arsenic. The optimum time and dosage for both nanocomposites were investigated as 90 min and 0.05 g/L, respectively. The Fe3O4/zeolite A and Fe2O3/zeolite A nanocomposites performed maximum arsenic removal percentages of 95.39% and 98.52%, respectively. The Fe3O4/zeolite A and Fe2O3/zeolite A proved to have better compatibility with pseudo-first order and pseudo-second order sequentially. The investigated nanocomposite with 1% or 3% loading of nanoparticles and pure nanoparticles regarding arsenic removal proved that nanoparticles dispersed uniformly with almost no agglomeration. Moreover, the nanocomposite with the same arsenate removal is more cost-efficient than a pure nanoparticle because the maximum free surface area of the nanoparticles in nanocomposites is available for arsenate ions and can be utilized for industrial usage.
- Subjects
ARSENIC removal (Water purification); NANOCOMPOSITE materials; NANOPARTICLES; ZEOLITES; MAGHEMITE; FREE surfaces
- Publication
Journal of the Iranian Chemical Society, 2023, Vol 20, Issue 7, p1657
- ISSN
1735-207X
- Publication type
Article
- DOI
10.1007/s13738-023-02787-w