et al., A. (2025). Self-Assembly Preparation of α-FeOOH Nanorods on Natural Diatomite and Its Application in the Remediation of Cu(II). Egyptian Journal of Aquatic Biology and Fisheries, 29(4), 51-72. doi: 10.21608/ejabf.2025.437608
AbdEl-Hafiz et al.. "Self-Assembly Preparation of α-FeOOH Nanorods on Natural Diatomite and Its Application in the Remediation of Cu(II)". Egyptian Journal of Aquatic Biology and Fisheries, 29, 4, 2025, 51-72. doi: 10.21608/ejabf.2025.437608
et al., A. (2025). 'Self-Assembly Preparation of α-FeOOH Nanorods on Natural Diatomite and Its Application in the Remediation of Cu(II)', Egyptian Journal of Aquatic Biology and Fisheries, 29(4), pp. 51-72. doi: 10.21608/ejabf.2025.437608
et al., A. Self-Assembly Preparation of α-FeOOH Nanorods on Natural Diatomite and Its Application in the Remediation of Cu(II). Egyptian Journal of Aquatic Biology and Fisheries, 2025; 29(4): 51-72. doi: 10.21608/ejabf.2025.437608
Self-Assembly Preparation of α-FeOOH Nanorods on Natural Diatomite and Its Application in the Remediation of Cu(II)
A novel α-FeOOH nanorods decorated hierarchically porous diatomite (FeOOH/Di) was prepared by the self-assembling method to be used in water treatment processes. The structure and surface property of the prepared nanocomposite was characterized by X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) analysis, and scanning electron microscopy images (SEM). The adsorption of Di with the prepared FeOOH/Di was applied for effective Cu2+ adsorption from aqueous solution. Adsorption with FeOOH/Di was reached faster and more efficiently (60min and 100% removal efficiency) than parent diatomite (120min with 54% removal efficiency). Different adsorption conditions as contact time, initial Cu2+ concentration and temperature were tested. The adsorption capacities increase with an increase in the initial concentration of the copper with a maximum adsorption capacity of Di and Di/FeOOH with 99.41mg g-1 at 130ppm and 164.46mg g-1 at 100ppm initial Cu2+ concentration, respectively. The removal efficiency increased with an increase in adsorption temperature up to 100oC.The α-FeOOH/Di nanocomposites presented excellent performance of both highly reactive surface hydroxyl sites and hierarchically porous silica consisting of large surface area and huge porous volume. Kinetic, thermodynamic and adsorption isotherm were investigated. The adsorption over parent Di was found to be physisorption process on homogenous surface, while, that over FeOOH/Di was chemisorptions process on heterogeneous adsorbent surface. Thermodynamic data show highly negative ΔG value and highly positive ΔH and ΔS, indicating that, the adsorption process is a spontaneous, disordered and endothermic process, confirming the improvement of the adsorption process after decorating the Di with FeOOH molecules.
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