Preparation and characterization of magnetite modified nanoparticles with p-benzoquinone-ethylenediamine for adsorption of humic acid from aqueous solution

Beiki, S.; Panahi, Homayoun Ahmad

doi:10.5004/dwt.2019.24240

Cited by 2 publications

(1 citation statement)

References 43 publications

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“…This suggested that the improved specific surface area of the composites increased the number of HA adsorption sites at the composite surface, leading to higher adsorption rates. New types of HA adsorbents, such as hybrids and composites, were recently reported [29][30][31]. The composite that was hydrothermally treated for 2 h should show similar or even better HA removal efficiency (around 52%) at pH = 7 than ceramicbased materials (22-50%) at a pH range of 6 and 9 within 1 h of contact time [32,33], although the adsorption was tested at different conditions.…”

Section: Resultsmentioning

confidence: 99%

Removal of humic acid from aqueous solutions by a novel hydrogarnet/zeolite composite

2020

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Removal of humic acid from aqueous solutions is pivotal to protect water from environmental and health concerns. Slurry consisting of silica gel, alumina, calcium hydroxide, and zeolite A was hydrothermally treated to prepare a hydrogarnet/ zeolite composite for humic acid removal from water. The amount of hydrogarnet formed and the partial disorder in the zeolite structure affected the porous properties of the composite. The zeolite content in the slurry influenced the humic acid adsorption capacity. The composite hydrothermally treated for 2 h showed improvement in higher humic acid adsorption capacity (9.0 mg g −1) than the composites hydrothermally treated for 6 and 24 h (7.4 and 5.9 mg g −1) based on the pseudo-second-order model. The adsorption capacity of the composite was related to its crystal phase and the lattice distortion of the hydrogarnet, not the amount of hydrogarnet formed.

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Section: Resultsmentioning

confidence: 99%

Removal of humic acid from aqueous solutions by a novel hydrogarnet/zeolite composite

2020

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Preparation and Characterization of Dendrimer‐Modified Magnetite Nanoparticles for Adsorption of Humic Acid from Aqueous Solution

2020

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In the present study, innovative Dendrimer‐Modified Magnetite Nanoparticle (DMMN) with core‐shell structures were synthesized as an adsorbent to remove humic acid (HA) from aqueous solution. Using the co‐precipitation technique, super paramagnetic iron nanoparticles were synthesized, and the surface of nanoparticles was functionalized with 3‐aminopropyltrimethoxysilane (APTMS). Then, 10‐generation dendrons were synthesized on the surface of functionalized nanoparticles by polymer grafting method. The sample was characterized by Fourier Transform Infra‐Red (FT‐IR), X‐ray diffraction (XRD), Scanning Electron Microscopy (SEM), Energy Dispersive X‐ray (EDX), and Barrett‐Joyner‐Halenda (BJH) as well as Brunauer‐Emmett‐Teller (BET) analyses, which the surface area of specific DMMN was achieved as 81.37 m2 g−1. Based on the obtained analysis results (SEM, XRD), 90 % of synthesized average nanoparticles diameter is less than 4 nm. Batch experiments were performed under varying operational conditions, namely pH, contact time, initial concentration HA, and adsorbent weight. The optimum adsorbent weight was found to be 0.25 gL−1, while the adsorption process was found to be optimal in the broad pH range of 3–9. The pseudo‐second‐order equation excellently defined the adsorption kinetics when the Langmuir model (R2=0.9967) better fit the adsorption isotherms. The adsorption capacity of DMMN was 103.8 mg HAg−1, that led to 99 % HA adsorption. Moreover, the calculated thermodynamic parameters, including standard enthalpy, entropy, and Gibbs free energy, show the spontaneous and endothermic nature of the adsorption procedure.

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Preparation and characterization of magnetite modified nanoparticles with p-benzoquinone-ethylenediamine for adsorption of humic acid from aqueous solution

Cited by 2 publications

References 43 publications

Removal of humic acid from aqueous solutions by a novel hydrogarnet/zeolite composite

Removal of humic acid from aqueous solutions by a novel hydrogarnet/zeolite composite

Preparation and Characterization of Dendrimer‐Modified Magnetite Nanoparticles for Adsorption of Humic Acid from Aqueous Solution

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