Predicting steroid hormone removal in a thin activated carbon layer coupled with ultrafiltration

Tagliavini, Matteo; Nguyen, Minh Nhat; Schäfer, A.I.

doi:10.1016/j.cej.2023.142125

Cited by 3 publications

(2 citation statements)

References 61 publications

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“…However, due to the difference in scale, the hydraulic residence time in fixed-bed columns is typically in the range of minutes and hours, , whereas the hydraulic residence time in the HLCM is only a few seconds. In addition, regarding the transport mechanisms in small-scale layers, such as in the case of MF, the axial dispersion could be an important transport mechanism compared to fixed-bed columns . Therefore, the saturation pattern in fixed-bed columns, which starts from the top and progresses downward with the direction of flow, does not necessarily apply to the HLCM.…”

Section: Resultsmentioning

confidence: 99%

“…In addition, regarding the transport mechanisms in small-scale layers, such as in the case of MF, the axial dispersion could be an important transport mechanism compared to fixed-bed columns. 91 Therefore, the saturation pattern in fixed-bed columns, which starts from the top and progresses downward with the direction of flow, 89 does not necessarily apply to the HLCM. If the HLCM is considered a fixed-bed column, another proposal to enhance the uptake could be adopting a thicker MF membrane to allow higher hematite loading.…”

Section: Influence Of Hydraulic Residence Time On Arsenic Adsorptionmentioning

confidence: 99%

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Microporous Hematite-Loaded Composite Membrane for Arsenic(III) and Arsenic(V) Removal

Boussouga

Tantish

Schäfer

2023

ACS Appl. Eng. Mater.

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In this work, adsorption and membrane separation were combined to remove adsorbable contaminants from water at lower energy requirements. Such an approach was investigated for arsenic (As) removal with hematite nanoparticles (70 ± 20 nm) immobilized in a microporous (0.2 μm pore size) poly(vinylidene fluoride) (PVDF) membrane. Hematite loading and hydraulic residence time with the role of speciation were investigated for As(III) and As(V) removal using hematite-loaded composite membrane (HLCM). During the flow-through filtration, it was observed 50% removal for As(III), while only 15% As(V) was removed at pH 8 with 2.6 mg/cm2 hematite loading, equivalent to uptakes of 5.5 ± 0.8 μgAs(III)/cm2 and 3.9 ± 0.6 μgAs(V)/cm2. Varying the pH from 2 to 12 and, ultimately, As(III, V) speciation showed a significant impact on the uptake, especially for As(V). In this case, increasing the NaCl concentration from 0.58 to 20 g/L hindered the charge attraction. Arsenic uptake increased with increasing the hematite loading from 0.7 to 3.9 mg/cm2, while the impact of the hydraulic residence time (flux) was observed. Arsenic uptake by this composite membrane requires further improvement in terms of adsorption capacity. Increasing the loading of hematite in the membrane or chemical modifications of hematite to achieve enhanced affinity for As(III, V) will be part of further material modification. From the water treatment perspective, the composite membrane potentially provides effective removal with a lower specific energy consumption compared to nanofiltration.

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Section: Resultsmentioning

confidence: 99%

Section: Influence Of Hydraulic Residence Time On Arsenic Adsorptionmentioning

confidence: 99%

Microporous Hematite-Loaded Composite Membrane for Arsenic(III) and Arsenic(V) Removal

Boussouga

Tantish

Schäfer

2023

ACS Appl. Eng. Mater.

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Applications of perovskite oxides for the cleanup and mechanism of action of emerging contaminants/steroid hormones in water

Bayode,

Emmanuel,

Osti

et al. 2024

Journal of Water Process Engineering

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Removal of glyphosate (GLY) and aminomethylphosphonic acid (AMPA) by ultrafiltration with permeate-side polymer-based spherical activated carbon (UF–PBSAC)

Trinh,

Schäfer

2024

Water Research

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Predicting steroid hormone removal in a thin activated carbon layer coupled with ultrafiltration

Cited by 3 publications

References 61 publications

Microporous Hematite-Loaded Composite Membrane for Arsenic(III) and Arsenic(V) Removal

Microporous Hematite-Loaded Composite Membrane for Arsenic(III) and Arsenic(V) Removal

Applications of perovskite oxides for the cleanup and mechanism of action of emerging contaminants/steroid hormones in water

Removal of glyphosate (GLY) and aminomethylphosphonic acid (AMPA) by ultrafiltration with permeate-side polymer-based spherical activated carbon (UF–PBSAC)

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