Synthesis and characterization of alumina-CNT membrane for cadmium removal from aqueous solution

Shahzad, Hafiz Khurram; Hussein, M.A.; Patel, Faheemuddin; Al-Aqeeli, N.; Atieh, Muataz Ali; Laoui, Tahar

doi:10.1016/j.ceramint.2018.06.175

Cited by 34 publications

(8 citation statements)

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“…To test the capability of the developed membrane for heavy metals removal, the adsorption capacity of cadmium (II) (or Cd (II)) from water was performed on the selected membrane (SPS-8). Adsorption capacity of Cd (II) from water was carried out using the flow loop shown in Figure 2 at pH = 6 to avoid precipitation of Cd (II) as reported in our previous work [ 55 ]. The developed membrane showed a removal efficiency of 97% for Cd (II), close to the values reported in the literature for other membranes [ 13 , 64 , 65 ] as presented in Table 2 .…”

Section: Resultsmentioning

confidence: 99%

“…The developed membrane showed a removal efficiency of 97% for Cd (II), close to the values reported in the literature for other membranes [ 13 , 64 , 65 ] as presented in Table 2 . Moreover, it showed a higher removal efficiency compared to either α-alumina or alumina–CNT powder mixture tested in similar conditions [ 55 ]. The mechanism of metal ions attachment on CNT is sorption and electrostatic attraction [ 66 ], while for alumina, it is simply physical adsorption [ 67 ].…”

Section: Resultsmentioning

confidence: 99%

“…The diametrical compression test was performed using a universal testing machine (INSTRON) to investigate the strength of the developed membrane. The diametrical strength was then calculated from Equation (1) [ 54 , 55 ] below: σ = (2· f /π· dt ) where f is the applied load, d is the diameter, and t is the thickness of the membrane.…”

Section: Experimental Methodsmentioning

confidence: 99%

Section: Characterization Of Sintered Membranementioning

confidence: 99%

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Porous Al2O3-CNT Nanocomposite Membrane Produced by Spark Plasma Sintering with Tailored Microstructure and Properties for Water Treatment

et al. 2020

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Ceramic-based nanocomposite membranes are gaining great attention in various applications, such as water treatment; gas separation; oil and gas, amid their superior fouling resistance and remarkable chemical/thermal stability. Here, we report for the first time the use of spark plasma sintering (SPS) process to fabricate a porous alumina–carbon nanotubes (Al2O3–CNT) nanocomposite membrane for water treatment. The challenge is this work is to achieve a balance between the amount of porosity, desired for a high water flux, and the membrane strength level, required to resist the applied pressure during a water flow experiment. The effect of SPS process parameters (pressure, temperature, heating rate, and holding time) on the microstructure and properties of the developed membrane was investigated and correlated. A powder mixture composed of Al2O3 and 5 wt % CNT was prepared with the addition of starch as a pore former and gum Arabic and sodium dodecyl sulfate as dispersants. The powder mixture was then sintered using SPS to produce a solid but porous nanocomposite membrane. The structure and microstructure of the developed membrane were characterized using X-ray diffraction and field emission scanning electron microscopy. The performance of the membrane was assessed in terms of porosity, permeability, and mechanical properties. Moreover, the adsorption capability of the membrane was performed by evaluating its removal efficacy for cadmium (II) from water. The microstructural analysis revealed that CNT were distributed within the alumina matrix and located mainly along the grain boundaries. The permeability and strength were highly influenced by the sintering pressure and temperature, respectively. The results indicated that the membrane sintered at a pressure of 10 MPa, temperature of 1100 °C, holding time of 5 min, and heating rate of 200 °C/min exhibited the best combination of permeability and strength. This developed membrane showed a significant removal efficiency of 97% for cadmium (II) in an aqueous solution.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Experimental Methodsmentioning

confidence: 99%

Section: Characterization Of Sintered Membranementioning

confidence: 99%

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Porous Al2O3-CNT Nanocomposite Membrane Produced by Spark Plasma Sintering with Tailored Microstructure and Properties for Water Treatment

et al. 2020

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“…Among these treatments, adsorption onto various materials is the main process which allows efficient and easy removal of heavy metals [5][6][7]. Among these metals, cadmium is known as one of the most harmful toxicants [8][9][10] and a lot of techniques have been investigated for its removal from water, such as precipitation, membrane filtration and adsorption [11], electrocoagulation [12][13][14][15] or membrane separation [16,17]. Physical processes require complex equipment and this fact explains the success of adsorptive removal of cadmium by low-cost adsorbents [18,19] and nanoadsorbents [20,21].…”

Section: Introductionmentioning

confidence: 99%

Optimization of cadmium ions biosorption by fish scale from aqueous solutions using factorial design analysis and Monte Carlo simulation studies

Jaafar

Darchen

Hamzi

et al. 2021

Journal of Environmental Chemical Engineering

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This work investigated cadmium ions biosorption on Fish scales (FS) of Sardina pilchardus. Different relevant parameters such as initial pH in the range 2.14 -7.76, initial cadmium concentration from 35 to 150 mg L -1 , and biosorbent dose in the range 50 -300 mg L -1 , were examined. The effect of these parameters on the cadmium removal was analyzed and optimized using full factorial design methodology and the analysis of variance. The kinetics were modelized for pseudo-second order and pseudo-first order models. Results showed that the pseudo-second order kinetic gave the best fit for equilibrium data. The biosorption isotherms were investigated for Freundlich and Langmuir models. Langmuir isotherm model gave the best fit and led to a maximum biosorption capacity of Cd(II) on FS of 52.08 mg g -1 . The results indicated that FS of was effective in the removal of cadmium ions. Optimum Cd(II) removal of 88.2% was calculated for pH 3, 75 mg L -1 of Cd(II) and 250 mg L -1 of FS. Monte Carlo simulation was used as relatively greener pathway to study the biosorption behavior of Cd(II) ions onto FS. It showed that the interaction Cd(II)hydroxyapatite was more favored than Cd(II)collagen.

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Membrane Applications of Nanomaterials (NMs)

2021

Sample Preparation With Nanomaterials

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Synthesis and characterization of alumina-CNT membrane for cadmium removal from aqueous solution

Cited by 34 publications

References 50 publications

Porous Al2O3-CNT Nanocomposite Membrane Produced by Spark Plasma Sintering with Tailored Microstructure and Properties for Water Treatment

Porous Al2O3-CNT Nanocomposite Membrane Produced by Spark Plasma Sintering with Tailored Microstructure and Properties for Water Treatment

Optimization of cadmium ions biosorption by fish scale from aqueous solutions using factorial design analysis and Monte Carlo simulation studies

Membrane Applications of Nanomaterials (NMs)

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