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Surface matrix functionalization of ceramic-based membrane for oil-water separation: A mini-review
Yusuf Olabode Raji,Mohd Hafiz Dzarfan Othman,Nik Abdul Hadi Sapiaa Md Nordin,Mohd Ridhwan Adam,Zhong Sheng Tai,Jamilu Usman,Ahmad Fauzi Ismail 한국화학공학회 2020 Korean Journal of Chemical Engineering Vol.37 No.10
Advanced filtration requires a cost-effective, highly efficient and environmentally friendly membrane fabrication to achieve excellent and extreme oleophobic and hydrophilic states with an appropriate surface functionalization approach. For an efficient oil-water separation, surface material and structure have been categorized as superoleophobic (high oil repellency) and superhydrophilic (strong affinity to water). This can be attributed to their selective mechanisms. In addition, it is very important to consider these key factors as they will imperatively provide a unique capability to exhibit surface roughness, stimulate low and high surface energy, and improve surface chemistry, which makes membranes function efficiently for the oil and water separation system. In this review article, the application of ceramic membrane for oily water treatment and the principle of superhydrophilic and superoleophobic ceramic membrane for oil-water separation are elaborated and, in addition, the current progress for the use of inorganic material to functionalize ceramic membrane surface based on physical and chemical methods is appraised. Finally, the challenges and outlook on the membrane for oily-water treatment are briefly examined.
Mohd Ridhwan Adam,Mohd Hafiz Dzarfan Othman,Siti Hamimah Sheikh Abdul Kadir,Muthia Elma,Tonni Agustiono Kurniawan,Ahmad Fauzi Ismail,Mohd Hafiz Puteh,Azeman Mustafa,Mukhlis A. Rahman,Juhana Jaafar,Hud 한국화학공학회 2021 Korean Journal of Chemical Engineering Vol.38 No.4
This work investigates the effectiveness of ammoniacal nitrogen (NH4 +-N) removal from contaminated water by adsorptive hollow fiber ceramic membrane (HFCM) derived from naturally made clinoptilolite. The technological value of this work is the simple mechanism of the adsorptive HFCM in removing gaseous ammonia in water by combining adsorption and separation. To test the technical feasibility of this proposed technology, clinoptilolite HFCM was fabricated via phase inversion-based extrusion/sintering technique and characterized by SEM and water permeation flux. The produced HFCM corresponds to the desired morphology of the asymmetric structure (dense and void formations) with outstanding adsorption performance of NH4 +-N. The effects of the HFCM’s operational parameters on its removal are examined in terms of membrane dosage and isothermal studies. The adsorption isotherm behavior exhibited that the adsorption process fitted the Freundlich isotherm model with outstanding removal performance even at trace concentration of ammonia. The low amount used by HFCM (4.75×104m2) resulted in over 96% ammonia removal, indicating a low cost of adsorption process. The regeneration of saturated HFCM suggests an outstanding recovery of the HFCM for its subsequent use for NH4 +-N removal. This study also reveals the potential of adsorptive HFCM as a simple and cost-effective technology for ammonia removal from wastewater.
Mohammad Arif Budiman Pauzan,Siti Khadijah Hubadillah,Mohd Hafiz Dzarfan Othman,Nurul Jannah Ismail,Mohd Hafiz Puteh,Huda Abdullah,Suriani Abu Bakar,Siti Hamimah Sheikh Abdul Kadir,Wong Keng Yinn 한국화학공학회 2021 Korean Journal of Chemical Engineering Vol.38 No.12
Kaolin has been found to be a more economical alternative in ceramic hollow membrane fabrication compared to alumina, silica, and zirconia despite having similar properties. However, it was discovered that apart from having high mechanical strength and the ability to withstand high operational temperature, the kaolin membrane has the tendency to dissolve in a high alkaline solution. Hence, in this study, zirconia (ZrO2) was imposed to kaolin suspension as co-starting material due to its stable hexagonal properties with kaolin to overcome this drawback. To study the dissolution property of the modified kaolin-based membrane, a phase inversion technique was used to fabricate zirconia- kaolin hollow fiber membrane (ZKHFM) followed by immersion in ammonium hydroxide (NH4OH) as an alkaline solution. Ammonia was aptly chosen for it being considered as one of the pollutants to be removed from wastewater. The mechanism, morphology and properties of the membrane were investigated in terms of sintering temperature, morphology, mechanical strength, pore size and porosity The results showed that ZKHFM with 10 wt% (ZK-10) with sintering temperature of 1,200 oC had the best performance in terms of having high mechanical strength (21MPa), excellent permeation flux (~1,600 Lm2/h) and lowest dissolution (0.01 g dissolute) at pH 13, indicating the ability of ZKHFM to be used in alkaline solution.
Asim Jilani,Mohammad Omaish Ansari,Ghani ur Rehman,Muhammad Bilal Shakoor,Syed Zajif Hussain,Mohd Hafiz Dzarfan Othman,Sajid Rashid Ahmad,Mohsin Raza Dustgeer,Ahmed Alshahrie 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.109 No.-
The toxic and carcinogenic organic compounds discharge from industries, contaminate the natural reservoirsof water and air which eventually pose a global threat not only to the aquatic life but also to thehumanity. Herein, ternary nanocomposites of silver-nanoparticle (AgNPs)-decorated on polyaniline(Pani)-wrapped zinc oxide nanorods (AgNPs@Pani/ZnO) were prepared via a facile approach. Thenanocomposite degraded 97.91% phenol with an optimized dosage and concentration of H2O2. Moreover, the apparent rate constant for phenol degradation was 3.69 times higher than for pure ZnOnanorods. The hydrogen production from AgNPs@Pani/ZnO was 1.58 and 2.74 times higher than Pani/ZnO and ZnO, respectively. The enhanced phenol degradation and hydrogen production is attributed tothe transfer of holes to the Pani, from which the electrons were transferred to the conduction band ofZnO and eventually to the conduction band of the AgNPs, where they accelerated the redox reactionsfor rapid photolysis of water and phenol. The concentration of the catalyst dosage affected the rate ofphenol degradation. Further, response surface methodology was also applied in order to design 13 setsof random experiments in which the catalyst dosage and degradation time were varied to predict thephenol degradation.
Faiz Hafeez Azhar,Zawati Harun,Siti Salwa Alias,Muhamad Zaini Yunos,Siti Aida Ibrahim,Tijjani Abdullahi,Azlinnorazia Ahmad,Mohd Hafiz Dzarfan Othman 한국고분자학회 2020 Macromolecular Research Vol.28 No.6
The photocatalytic polymer mixed matrix membrane (MMM) has been widely used for the separation and purification process. The objective of this study is to investigate the effect of structural TiO2 (synthetic TiO2 (ST), flower-like TiO2-100 (FLT-100), and flower-like TiO2-600 (FLT-600)) based on the total surface area for the efficient self-cleaning antifouling property. The asymmetric MMMs were fabricated using the phase inversion process with a different type of structural TiO2 as additive. As a result, the addition of synthesized FLT, especially FLT-100, has influenced the hydrophilicity and surface roughness of the MMM. From the powder analysis, FLT-100 exhibits the highest total surface area with 37.25 m2/g and strongly affects the self-cleaning antifouling performance of the MMM. This membrane produced the highest self-cleaning efficiency (68.8%) compared to FLT-600 (58%) and ST (39.8%) after UV exposure, thus, indicates in a better self-cleaning antifouling property that offers the potential to be considered for commercialization in reducing the maintenance cost by using both physical and chemical cleaning method that becomes a problem in membrane technologies.
Nizar Mu’ammar Mahpoz,Norfazliana Abdullah,Mohamad Zahir Mohd Pauzi,Mukhlis A. Rahman,Khairul Hamimah Abas,Azian Abd Aziz,Mohd Hafiz Dzarfan Othman,Juhana Jaafar,Ahmad Fauzi Ismail 한국화학공학회 2019 Korean Journal of Chemical Engineering Vol.36 No.3
This work describes the development of zeolitic imidazolate framework-8 (ZIF-8) membranes on modified alumina hollow fiber for desalination by forward osmosis. Effects of different seeds (ZnO, NiO and PDA) and sodium formate on in-situ deposition of ZIF-8 were studied in relation to the membrane’s morphology and performance. XRD result shows that ZIF-8 was successfully synthesized in the presence of sodium formate. FESEM images showed PDA modified support was unsuccessful in producing well defined and dense ZIF-8 membrane layer even after another ZIF-8 re-deposition due to its minimal amount. The NiO modified support was also found unsuccessful, as ZIF-8 crystals were formed in clusters. On the contrary, dense ZIF-8 membrane was successfully prepared on ZnO modified support with SF-1 synthesis solution producing bigger ZIF-8 crystal and thinner ZIF-8 membrane than as of SF-2. Water flux performance in forward osmosis showed that NiO/ZIF-8, PDA/ZIF-8 and PDA/ZIF-8 (re-deposition) membranes gave negative water fluxes of 50 kg/m2·h, 5.2 kg/m2·h and 1.7 kg/m2·h with reverse solutes of 42.66 mol/m2·h, 27.42mol/m2·h and 3.22 mol/m2·h, respectively, indicating the solute from draw solution diffused into the feed solution. However, ZIF-8 membrane prepared using SF with molar ratio of 1, on the ZnO modified support had a water flux of 13.3 kg/m2·h, reverse solute of 0.95 kg/m2·h and salt rejection of 52.1%. When the SF ratio was increased to 2, the ZIF-8 membranes showed a water flux of 12.5 kg/m2·h, reverse solute of 1.64 kg/m2·h and salt rejection of 54.9%. The moderate salt rejection could be associated with defects in the ZIF-8 membranes due to poor grain boundaries.