Synthesis and characterization of Fe3O4/SiO2/C nanocomposites and their potential for NH4+ ion removal from shrimp farm wastewater
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Review Reports

Keywords

Magnetic nanocomposites
NH4 removal
Shrimp waste

How to Cite

Syah, A. A., Syavika, L., Wijaya, A. R., & Kusumawati, N. (2026). Synthesis and characterization of Fe3O4/SiO2/C nanocomposites and their potential for NH4+ ion removal from shrimp farm wastewater. Eclética Química, 51, e–1583. https://doi.org/10.26850/1678-4618.eq.v51.2026.e1583

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Abstract

The synthesized Fe3O4/SiO2/C nanocomposites are adsorbents for NH4+ ion removal from shrimp farm effluent. Fe3O4 nanomagnets were synthesized via coprecipitation, coated with silica and carbon using 2% NaOH activation, and PEG4000 as a binder. Structural characteristics were investigated through XRD, FT-IR, and VSM. Physico-chemical parameters, including adsorbent amount (0.05–0.3 g), contact time (10–70 min), and initial NH4Cl concentration (0.1–0.8 mg L1), were investigated. Maximum NH4+ removal efficiency (83.5%) was achieved at 55 min with 0.2 g adsorbent mass, using a solution of 0.4 mg L–1 NH4Cl at pH 7 and 25 ºC. Pseudo-second-order kinetic model (R² = 0.9998) was satisfied with an adsorption capacity of 0.037 mg g1. Langmuir isotherm estimated a capacity range of 0.005 to 0.087 mg g1. The adsorption process occurs exothermically, spontaneously, and is physisorption. Filtrate analysis by UV-Vis with phenate reagents showed notable reduction in NH4+ levels post-adsorption (0.077-0.282 mg L1) with GIS visualization, showcasing effective environmental preservation. These nanocomposites successfully adsorbed NH4+ in shrimp pond effluent with potential magnetic recovery.

https://doi.org/10.26850/1678-4618.eq.v51.2026.e1583
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Review Reports

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