Synthesis and properties of a high-capacity iron oxide adsorbent for fluoride removal from drinking water

Zhang, Chang; Li, Yingzhen; Wang, Ting-Jie; Jiang, Yanping; Fok, Jason

doi:10.1016/j.apsusc.2017.06.159

Cited by 76 publications

(24 citation statements)

References 59 publications

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“…Adsorption Capacity (mg/g) Hydrous Ferric Oxide [2] 6.71 Iron Oxide [3] 60.8 Modified magnetite [4] 1.86 Aluminum Modified Iron Oxides [8] 0.354 Magnesia-Pullulan Composite [9] 16.6 Hematite 2.5 3D printed microchannel by varying the inner design of the channel could be an alternative method for the traditional column that is being used for fluoride removal [10]. The printed channel device was compact and easy to handle.…”

Section: Adsorbentmentioning

confidence: 99%

“…2 Elimination can be achieved through cation exchange resin, membrane separation, electrodialysis. However, oxides and hydroxides of Al, Mg, Ti, Zr, Ce, La, and Fe [2][3][4] have been reported to remove fluoride in the range of 75-90% at comparatively low cost [5].…”

Section: Introductionmentioning

confidence: 99%

“…To optimize the adsorption capacity, 3D printed microchannels were loaded with metal oxide nanoparticles have been prepared and tested in the present approach that has the potential to be a directly applicable system for fluoride removal. 3 .9H 2 O in distilled water was sonicated for 10 min. until it forms a clear solution (a).…”

Section: Introductionmentioning

confidence: 99%

“…Brunauer-Emmett-Teller (BET) surface area, pore size distributions, pore volumes, and average particle size were measured by nitrogen adsorption/desorption isotherm at -195.85°C (77.3 K) using The 3D microchannel ( Figure 1) was designed by using SolidWorks software and printed using MiiCraft 3D printer (PN#95.LF800G004). The printing machine was based on stereolithography (SLA), minimum resolution across the XY axis and Z axis are 56 microns 3 and 50 microns respectively. Transparent resin (Clear Resin BV-003) was used having boiling point and a specific gravity of 150°C and 1 g/mL respectively at 25°C.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

3D printed microchannel loaded with hematite nanoadsorbent for fluoride removal from water

et al. 2019

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Section: Adsorbentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

3D printed microchannel loaded with hematite nanoadsorbent for fluoride removal from water

et al. 2019

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“…The influence of iron oxide nanoparticles on the adsorption of organic matter on magnetic powdered activated carbon was investigated by Lompe et al [22], where authors highlighted the synergy of activated carbon and iron nanoparticles to produce adsorbents for natural organic contaminants. Synthesis and properties of a high-capacity iron oxide adsorbent for fluoride removal from drinking water is in detail described by Zhang et al [23]. Fe 3 O 4 nanomaterials and their effect on wastewater treatment were investigated in several studies.…”

Section: Introductionmentioning

confidence: 99%

Recycling of a wastewater to iron oxide micro structures

Horváth¹,

Simo²,

Šalgó³

et al. 2019

Environ. Res. Commun.

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The proposed work describes new perspectives for recycling of a salty industrial wastewater to microstructured iron oxides with capturing potential for minor carbon-and metallic contaminations. Byproducts generated by electrochemical treatment of a rubber wastewater with sacrificial steel anode were separated, dried, desalinated, and thermally processed at 800 and 1100°C in a nitrogen atmosphere to investigate the effects of chemically bound oxygen on iron oxide formation. The obtained powder products were different phases of iron oxides, such as hematite, maghemite, magnetite; depending on the annealing temperature. All of the phases are interesting from a recycling point of view, the microstructure, elementary composition and crystallinity of the solid products before and after thermal treatment were investigated via SEM-EDX and PXRD techniques.

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Fluoride Substitution: Quantifying Surface Hydroxyls of Metal Oxides with Fluoride Ions

Lau,

Zerebecki,

Pielsticker

et al. 2024

Adv Materials Inter

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Surface hydroxyls (OH) are crucial for heterogeneous catalysis in water. However, they are commonly characterized at solid–gas interfaces (e.g., FTIR, XPS, TGA), which may not represent the surface in aqueous environments. Here, the surface OH of five catalytically relevant oxides (Al2O3, ZrO2, TiO2, Fe2O3, Co3O4) are quantified by substituting them with F− ions at pH 3–10, where the surface fluoride (F) density is evaluated by XPS using the geometry factor for spherical particles. These results show that the surface F density peaks at around pH 4 across all oxides, but decreases at more basic pH due to increased OH− competition. Generally, oxides more abundant in surface OH can also accommodate more surface F, establishing F− ions as effective probes. While terminal F are likely the preferential substitution product, bridging F also appear to form at lower pH levels. Furthermore, fluoride substitution is applied to a series of Co3O4 gradually enriched with defects using pulsed laser defect engineering in liquid (PUDEL). This approach reveals a linear correlation between laser processing and surface OH density, which aligns with a previously observed improvement in OER activity, and is supported by additional DFT calculations here. This work will stimulate further studies adopting fluoride substitution to better understand the relationship between surface chemistry and catalytic processes in aqueous environments.

show abstract

Synthesis and properties of a high-capacity iron oxide adsorbent for fluoride removal from drinking water

Cited by 76 publications

References 59 publications

3D printed microchannel loaded with hematite nanoadsorbent for fluoride removal from water

3D printed microchannel loaded with hematite nanoadsorbent for fluoride removal from water

Recycling of a wastewater to iron oxide micro structures

Fluoride Substitution: Quantifying Surface Hydroxyls of Metal Oxides with Fluoride Ions

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