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Mustafa Mohammed Aljumaily

Bio: Mustafa Mohammed Aljumaily is an academic researcher from University of Malaya. The author has contributed to research in topics: Adsorption & Membrane. The author has an hindex of 6, co-authored 11 publications receiving 120 citations. Previous affiliations of Mustafa Mohammed Aljumaily include Sultan Qaboos University & University of Fallujah.

Papers
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Journal ArticleDOI
TL;DR: The hydrophobicity of the CNM, expressed by the CA, follows the trend of CS-mixed CNFs, which paves the way for future applications of synthesized CNM to fabricate water-repellent industrial-grade technologies.
Abstract: Demand is increasing for superhydrophobic materials in many applications, such as membrane distillation, separation and special coating technologies. In this study, we report a chemical vapor deposition (CVD) process to fabricate superhydrophobic carbon nanomaterials (CNM) on nickel (Ni)-doped powder activated carbon (PAC). The reaction temperature, reaction time and H2/C2H2 gas ratio were optimized to achieve the optimum contact angle (CA) and carbon yield (CY). For the highest CY (380%) and CA (177°), the optimal reaction temperatures were 702 °C and 687 °C, respectively. However, both the reaction time (40 min) and gas ratio (1.0) were found to have similar effects on CY and CA. Based on the Field emission scanning electron microscopy and transmission electron microscopy images, the CNM could be categorized into two main groups: a) carbon spheres (CS) free carbon nanofibers (CNFs) and b) CS mixed with CNFs, which were formed at 650 and 750 °C, respectively. Raman spectroscopy and thermogravimetric analysis also support this finding. The hydrophobicity of the CNM, expressed by the CA, follows the trend of CS-mixed CNFs (CA: 177°) > CS-free CNFs (CA: 167°) > PAC/Ni (CA: 65°). This paves the way for future applications of synthesized CNM to fabricate water-repellent industrial-grade technologies.

54 citations

Journal ArticleDOI
TL;DR: In this study two deep eutectic solvents (DESs) were prepared using ethylene glycol (EG) and two different ammonium-based salts and applied as new adsorbents for the removal of methyl orange from water.

51 citations

Journal ArticleDOI
TL;DR: In this paper, a phase inversion process based on central composite design is introduced to minimize the number of experiments required for membrane fabrication, where the hydrophobic membrane fabrication conditions are modeled as independent parameters, with the flux provided as the model response.
Abstract: Surface hydrophobicity is the most desirable characteristic for high DCMD performance. Superhydrophobic carbon nanomaterials/powder activated carbon (CNMs/PAC) has unique properties and believed to be the proper candidate to increase the membrane hydrophobicity with maintaining good mechanical properties and high porosity at the same time. In this work, we introduce a phase inversion process based on central composite design, aimed at minimizing the number of experiments required for membrane fabrication. The hydrophobic membrane fabrication conditions are modeled as independent parameters, with the flux provided as the model response. The analyses performed on the membrane structure and surface, as well as its mechanical properties revealed that the superhydrophobic CNMs/PAC significantly enhances the hydrophobicity of the composite membrane surface. The accuracy measurements obtained by analysis of variance showed that the model developed and all the proposed parameters have significant effects on the flux. However, the CNMs/PAC emerged as the most significant influential factor and interacted with polymer concentration and casting knife thickness to exert effects on the permeate flux. The optimum preparation parameters were 775.21 mg carbon loading, PVDF-HFP concentration of 21.86 g and casting knife thickness of 118.93 μm, as these values yield the highest flux of about 102 kg/m2h.

30 citations

Journal ArticleDOI
TL;DR: In this paper, conditions for fabricating high-hydrophobic carbon nanomaterials (CNMs) by chemical vapor deposition technique on nickel-doped powder activated carbon such as reaction temperature, reaction time, and H2:CH4 gas ratio were optimized to achieve the optimum contact angle (CA).
Abstract: In this work, conditions for fabricating high-hydrophobic carbon nanomaterials (CNMs) by chemical vapor deposition technique on nickel-doped powder activated carbon such as reaction temperature, reaction time, and H2:CH4 gas ratio were optimized to achieve the optimum contact angle (CA). The results showed that the optimal reaction temperature, H2:CH4 gas ratio, and reaction time for the highest CA of 145° were 950°C, 1:1, and 20 min, respectively. The CNM with a CA of 145° was embedded with poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-co-HFP) membrane to improve its hydrophobicity and, in turn, its seawater desalination performance by direct contact membrane distillation (DCMD). Various CNM contents (i.e., 1.0, 3.0 and 5.0 wt.%) were embedded with 22:78 (wt.%) of PVDF-co-HFP/N-Methyl-2-pyrrolidone solution to prepare flat-sheet membranes via phase inversion. CNM content plays an important role in the membrane preparation and thus affected the DCMD performance. Particularly interesting was the membrane prepared from dope mixture with the 5 wt.% CNMs, which resulted in an increase in CA from 83° to 133°, and porosity from 45.3% to 96.94%, along with a decrease in the membrane thickness from 210 to 165 μm. However, CNM embedding into the casting mixture also affected the membrane’s mechanical properties. Finally, DCMD permeation was enhanced from 10 to 16 L/hm2 by embedding 5 wt.% of CNMs at the feed temperature of 45°C with salt rejection >99.9%.

26 citations

Journal ArticleDOI
26 Apr 2022-Water
TL;DR: In this article , the incorporation of hydrophobic carbon nanospheres (CNS) prepared from the pyrolysis of acetylene using the chemical vapor deposition technique with poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) in order to enhance its hydrophobicity was investigated.
Abstract: Chemical pollutants, such as methyl orange (MO), constitute the main ingredients in the textile industry wastewater, and specifically, the dyeing process. The use of such chemicals leads to huge quantities of unfixed dyes to make their way to the water effluent and consequently escalates the water pollution problem. This work investigates the incorporation of hydrophobic carbon nanospheres (CNS) prepared from the pyrolysis of acetylene using the chemical vapor deposition technique with poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) in order to enhance its hydrophobicity. Moreover, a deep eutectic solvent (DES) was used to enhance the membrane’s porosity. The former was based on the quaternary ammonium salt (N,N-diethyl-ethanol-ammonium chloride) as a chemical addition throughout the membrane synthesis. Direct contact membrane distillation (DCMD) was employed to assess the performance of the modified membrane for treatment of MO contaminated water. The phase inversion method was used to embed various contents of CNS (i.e., 1.0, 3.0, and 5.0 wt.%) with 22:78 wt.% of PVDF-co-HFP/N-Methyl-2-pyrrolidone solution to prepare flat-sheet membranes. The membrane embedded with 5 wt.% CNS resulted in an increase in membrane hydrophobicity and presented considerable enhancement in DCMD permeation from 12 to 35 L/h.m2 with salt rejection >99.9%. Moreover, the composite membrane showed excellent anti-biofouling and mechanical characteristics as compared to the pristine counterpart. Using this membrane, a complete rejection of MO was achieved due to the synergistic contribution of the dye negative charge and the size exclusion effect.

23 citations


Cited by
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Journal ArticleDOI
TL;DR: Deep eutectic solvents (DESs) have recently received a great interest in diverse fields including nanotechnology due to their unique properties as new green, efficient dispersants and as large-scale media for chemical and electrochemical synthesis of advanced functional nanomaterials.

385 citations

Journal ArticleDOI
TL;DR: In this paper, a review of the very recent progresses in the drag reduction studies using superhydrophobic surfaces is presented, where the limitations of using such surfaces in industrial applications, which deals with harsh and destructive environment conditions, are addressed and further research topics and future outlooks to improve the durability of the superhydrophic surfaces are discussed.

121 citations

Journal ArticleDOI
TL;DR: In this article, an entirely conceptual and critical review of literature is presented, focusing on the tremendous potential of composite hydrogels to remediate dye-contaminated water, and the main drawbacks and challenges associated with the application of these types of materials are reviewed to understand the research gap and limitations regarding their practical use.

117 citations

Journal ArticleDOI
TL;DR: In this paper, a brief introduction to Membrane distillation and a summary of the research efforts to acquire the desired properties in polymeric membranes used in MD for desalination purposes are presented.

104 citations

Journal ArticleDOI
01 Jan 2021
TL;DR: In this paper, the performance of various adsorbent groups in the mitigation of methyl orange (MO) from aqueous solutions was evaluated based on an analysis of over 240 published works of literature on the subject within the last 5 years.
Abstract: Adsorption as a technique is preferred to these other methods in the mitigation of methyl orange (MO) because of its simplicity in design and operation, indifferent sensitivity towards toxicants and low operational cost. This study is aimed at evaluating the performance of various adsorbent groups in the mitigation of MO from aqueous solutions. It will help reduce the arbitrary choice of adsorbent types for MO adsorption leading to a reduction in the amount of published literature with little/incremental contributions to the field. The study was based on an analysis of over 240 published works of literature on the subject within the last 5 years. The adsorbents were classified into the following seven groups based on their chemical composition; biosorbents, activated carbon, biochar, clays and minerals, polymers and resins, nanoparticles, and composites. In terms of frequency of utilisation of adsorbent group, composites were the most frequently used (>40%). It was observed that nanoparticles and polymers were the most frequently used constituents in the manufacture of composite adsorbents for MO. The choice of nanoparticles in composite adsorbents could be due to their flexibility in going into the matrices of other material types due to their small sizes. Polymers also act as good matrices for immobilising other composite constituents. Nanoparticles was the best adsorbent group for MO uptake. Clays and minerals had the greatest proportion of adsorbents with MO uptake capacity greater than the 1000 ​mg/g threshold.

76 citations