Hafiza Shukor
Thumbnail Image
Preferred name
Hafiza Shukor
Official Name
Hafiza, Shukor
Alternative Name
Hafiza, S.
Shukor, H.
Main Affiliation
Scopus Author ID
56248038900
Researcher ID
AAK-7519-2020

Research Output

Filters

20
Reset filters

Settings
Now showing 1 - 10 of 20
  • Publication
    Biomass to biobutanol: Current trends and challenges
    ( 2024-08-23)
    Amin M.A.
    ;
    Hafiza Shukor
    ;
    Shoparwe N.F.
    ;
    Makhtar M.M.Z.
    ;
    Jalil R.
    The term "biofuel" refers to a liquid or gas fuel obtained mostly from biomass for use in transportation. Biobutanol is a potential replacement biofuel for fossil-based liquid fuels as they become depleted. Biobutanol is a transportation fuel that may be simply combined with either gas or petrol at any ratio. Clostridia are the most prevalent fermentative organisms used in biobutanol production. It might well be recognized for its ability to use the acetone-butanol-ethanol (ABE) fermentation route to convert various types of renewable biomass to biobutanol. Various aspects of biobutanol fermentation, including butanol toxicity and product titer, have also been addressed. The recent advancement in lignocellulosic biomass treatment technology, which is significantly greener and safer for the environment, has been clearly articulated. This chapter also covers several metabolic engineering and simple engineering laboratory approaches such as Adaptive Laboratory Evolution (ALE) for strain improvement to overcome butanol toxicity. These biobutanol difficulties could be solved to improve microorganism resistance to high solvent concentrations and hence increase biobutanol output. The final section of this chapter will discuss the future of biobutanol production as a new sustainable and renewable future transportation fuel. Overall, this chapter will provide a better grasp of current trends and issues in biomass-based biobutanol production.
  • Publication
    Arthropods-mediated green synthesis of Zinc oxide nanoparticles using cellar spider extract a biocompatible remediation for environmental approach
    ( 2024-06)
    Muzamir Isa
    ;
    Muhammad Nur Aiman Uda
    ;
    M. A. R. Irfan
    ;
    Uda Hashim
    ;
    Subash Chandra Bose Gopinath
    ;
    Hafiza Shukor
    ;
    MRM Huzaifah
    ;
    Maimunah Mohd Ali
    ;
    Nur Hulwani Ibrahim
    ;
    Muaz Mohd Zaini Makhtar
    ;
    Ng Qi Hwa
    ;
    Mohd Khairul Rabani Hashim
    ;
    Zainal Abidin Arsat
    ;
    Nor Azizah Parmin
    ;
    Liyana Ahmad Sofri
    ;
    Mahfuz Affif Mohd Ruslan
    ;
    Tijjani Adam
    This study presents an eco-friendly approach to synthesizing zinc oxide nanoparticles (ZnO NPs) using extracts from cellar spiders, addressing environmental and health concerns associated with conventional methods. The spider extract efficiently reduced zinc acetate dihydrate, and the synthesized ZnO NPs underwent comprehensive quantitative characterization, including size, shape, morphology, surface chemistry, thermal stability, and optical properties using Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), zeta potential measurements, thermogravimetric analysis (TGA), and UV-vis spectroscopy. The nanoparticles exhibited intended characteristics, and their adsorption capability for methylene blue (MB) was quantitatively assessed using the Freundlich isotherm model and pseudo-second-order kinetic model, providing numerical insights into MB removal efficiency. The study demonstrates the potential of these green-synthesized ZnO NPs for applications in environmental remediation, wastewater treatment, and antibacterial therapies, contributing to both sustainable nanomaterial development and quantitative understanding of their functional properties.
  • Publication
    Fabrication of active food packaging based on PLA/Chitosan/CNC-containing Coleus aromaticus essential oil: application to Harumanis mango
    ( 2023-12-01)
    Hasnida Raja Hashim R.
    ;
    Ahmad Anas Nagoor Gunny
    ;
    Sam Sung Ting
    ;
    Subash Chandra Bose Gopinath
    ;
    Fong Y.Y.
    ;
    Pareek S.
    ;
    Makhtar M.M.Z.
    ;
    Hafiza Shukor
    This study aimed to determine the effect of Coleus aromaticus essential oil (CAEO) on the properties of an active film based on polylactic acid (PLA), chitosan (Cs), and cellulose nanocrystal (CNC) in fruit packaging. The films were fabricated via solvent casting technique. The obtained films’ antimicrobial, antioxidant, microstructural, and mechanical properties were studied. Mechanical properties state how adding essentials oil into film improves the elongation breaks significantly (p < 0.05) by 5.3 and 6.1%, respectively, with the addition of 0.4 wt% and 0.8 wt% CAEO which reflets its flexibility. The antioxidant activity of biopolymer film increased significantly (p < 0.05), with antioxidant values ranging from 6.50 to 57.50% with the elevation of CAEO. The inhibitory impact of the film against pathogenic fungus was evaluated in vitro and in vivo by comparing the film with different concentrations of essential oil (EO), as well as the control and chemical fungicide. Disc diffusion was utilised to test mycelial growth suppression, and the film containing 1.2 wt% EO produced the best results. The biofilm containing 1.2 wt% EO successfully reduced illness incidence in vivo with damaged mango. Scanning Electron Microscopy and Transmission Electron Microscopy imaging were used to observe the incorporation of CAEO in the matrix of the film. All Fourier-Transform Infrared spectra of PLA/Cs/CNC and EO blends exhibited the characteristic bands of PLA-based materials. The results indicate that the PLA/Cs/CNC/CAEO films provide a new way to improve microbial safety and extend the shelf life of mango fruit and have the potential for replacement of petroleum-based plastic for fruit packaging applications at the industrial level.
  • Publication
    Microbial Fuel Cell: Simultaneous Bioremediation and Energy Recovery Technology
    ( 2023-01-01)
    Pusphanathan K.
    ;
    Tuesday M.
    ;
    Mohamad Sobri M.F.
    ;
    Mohd Zaini Makhtar M.
    ;
    Shoparwe N.F.
    ;
    Hafiza Shukor
    ;
    Zainuddin N.I.
    Microbial fuel cells (MFCs) are a promising technology for producing electricity from a variety of materials, including natural organic matter, complex organic waste, and renewable biomass, and can be advantageously combined with wastewater treatment applications. For this reason, it represents a superb option for a long-term, eco-friendly renewable energy supply. The current review article discusses about Malaysia's historical energy consumption trend. Following that, Malaysia experienced a revolution in energy-based policies, such as the National Energy Policy 1979, which focuses on the effectiveness of energy supply while minimising negative environmental impacts through the development of new technologies such as MFC technology. In addition, the concept and operation principle of MFC are discussed in this review. This paper focuses on single-chambered and dual-chambered MFC. The performance of MFCs is influenced by the substrate used so the various substrates that are commonly used today are also discussed.
  • Publication
    Polysulfone (Psf) mixed matrix membrane incorporating titanium dioxide (TiOâ‚‚)/Polyethylene glycol (PEG) for the removal of copper
    ( 2024-10)
    Vasuumathi A/P Ilango Mathialagan
    ;
    Sivaneswari A/P M Devarajoo
    ;
    Hafiza Shukor
    ;
    Muhammad Nur Aiman Uda
    ;
    Noor Fazliani Shoparwe
    ;
    Muaz Mohd Zaini Makhtar
    ;
    Nor’ Izzah Zainuddin
    The global increasing contamination of water resources with toxic metals such as copper (Cu), poses severe threats to human health and aqueous ecosystems. Therefore, the ultrafiltration mixed matrix membranes (UF MMMs) possess an applicable approach for the removal of copper ions. This novel fabricated technology can be applied in various wastewater treatment systems for the removal of heavy metals, especially copper. MMMs were fabricated by blending polysulfone (Psf) with additives into the dope solution via the phase inversion method by incorporating titanium dioxide (TiOâ‚‚) and polyethylene glycol (PEG) in Psf MMMs. Seven Psf MMMs samples labelled M0 to M6, each with its own formulation, were prepared and tested for density, porosity, and degree of Cu retention. MMMs were further characterized via Fourier transform infrared spectroscopy (FTIR), which revealed the range of the IR spectrum of Psf polymer membrane from 1319 cm-1 to 1600 cm-1, 1650 cm-1 to 3400 cm-1 for PEG, and 800 cm-1 to 3600 cm-1 for TiOâ‚‚ NPs. As for the scanning electron microscopy (SEM), M6 (Psf/TiOâ‚‚/PEG 6000) was found to be the most dense and highest porous morphology asymmetric Psf MMM. The retained percentage of Cu and flux for M6 attained the highest value of 80.3% and 136.99 L/m2 .h respectively, whereas for the neat Psf membrane, M0 exhibited the lowest retained percentage of Cu and flux, about 25.8% and 61.64 L/m2.h. The inclusion of pore former and additives has shown an improvement of 54.5% in the copper rejection. Moreover, M6 displayed the highest antifouling properties compared to other Psf MMMSs. This study proves that PEG and TiOâ‚‚ additives have significant potential to improve membrane performance due to the highest percentage of Cu retained on the surface of the membrane as adsorptive separation on Psf MMMs.
  • Publication
    The Effect of Different Pretreatment of Chicken Manure for Electricity Generation in Membrane-Less Microbial Fuel Cell
    ( 2022-08-01)
    Mohd Azmi N.
    ;
    Mohd Sabri M.N.I.
    ;
    Tajarudin H.A.
    ;
    Shoparwe N.F.
    ;
    Makhtar M.M.Z.
    ;
    Hafiza Shukor
    ;
    Alam M.
    ;
    Siddiqui M.R.
    ;
    Rafatullah M.
    The need for energy resources is growing all the time, which means that more fossil fuels are needed to provide them. People prefer to consume chicken as a source of protein, and this creates an abundance of waste. Thus, microbial fuel cells represent a new technological approach with the potential to generate electricity through the action of electrogenic bacteria toward chicken manure, while reducing the abundance of chicken manure. This study investigated the effect of different pretreatment (thermal, alkaline, and sonication pretreatment) of chicken manure to improve the performance of a membrane-less microbial fuel cell (ML-MFC). Statistical response surface methodology (RSM) through a central composite design (CCD) under a quadratic model was conducted for optimization of the ML-MFC performance focusing on the COD removal efficiency (R2 = 0.8917), biomass (R2 = 0.9101), and power density response (R2 = 0.8794). The study demonstrated that the highest COD removal (80.68%), biomass (7.8539 mg/L), and power density (220 mW/m2) were obtained when the pretreatment conditions were 140 °C, 20 kHz, and pH 10. The polarization curve of the best condition of ML-MFC was plotted to classify the behavior of the ML-MFC. The kinetic growth of Bacillus subtillis (BS) showed that, in treated chicken manure, the specific growth rate µ = 0.20 h−1 and doubling time Td = 3.43 h, whereas, in untreated chicken manure, µ = 0.11 h−1 and Td = 6.08.
  • Publication
    Efficiency of Fabricated Adsorptive Polysulfone Mixed Matrix Membrane for Acetic Acid Separation
    ( 2023-06-01)
    Pusphanathan K.
    ;
    Hafiza Shukor
    ;
    Shoparwe N.F.
    ;
    Makhtar M.M.Z.
    ;
    Zainuddin N.I.
    ;
    Jullok N.
    ;
    Siddiqui M.R.
    ;
    Alam M.
    ;
    Rafatullah M.
    The ultrafiltration mixed matrix membrane (UF MMMs) process represents an applicable approach for the removal of diluted acetic acid at low concentrations, owing to the low pressures applied. The addition of efficient additives represents an approach to further improve membrane porosity and, subsequently, enhance acetic acid removal. This work demonstrates the incorporation of titanium dioxide (TiO2) and polyethylene glycol (PEG) as additives into polysulfone (PSf) polymer via the non-solvent-induced phase-inversion (NIPS) method to improve the performance of PSf MMMs performance. Eight PSf MMMs samples designated as M0 to M7, each with independent formulations, were prepared and investigated for their respective density, porosity, and degree of AA retention. Morphology analysis through scanning electron microscopy elucidated sample M7 (PSf/TiO2/PEG 6000) to have the highest density and porosity among all samples with concomitant highest AA retention at approximately 92.2%. The application of the concentration polarization method further supported this finding by the higher concentration of AA solute present on the surface of the membrane compared to that of AA feed for sample M7. Overall, this study successfully demonstrates the significance of TiO2 and PEG as high MW additives in improving PSf MMM performance.
  • Publication
    Mixed Matrix Membrane (MMMs) as Membrane Based Separation Technology: A Review
    ( 2023-01-01)
    Pusphanathan K.
    ;
    Hafiza Shukor
    ;
    Shoparwe N.F.
    ;
    Makhtar M.M.Z.
    ;
    Zainuddin N.I.
    ;
    Jullok N.
    Mixed matrix membrane (MMMs) is an innovative membrane based-separation technology that plays an essential role in liquid and gas separation and purification recently. This review emphasizes mainly on the current MMMs technology. The discussion begins with a background of the MMMs technologies, followed by a comparison between the MMMs technology porous and non-porous membranes. Following that, state-of-the-art MMMs are featured, which contain a variety of polymers and non-polymers, as well as inorganic fillers and materials. The binary filler approach is also explained, which combines two filler materials to achieve synergistic improvements in MMMs. The development of new robust, high-performance materials is one type of revolutionary membrane preparation approach for harsh and inconsiderate environments. In comparison to pristine polymeric membranes, blended mixed matrix membranes with polymer, solvent, and additives are believed for efficient performance. In addition, fabrication strategies for MMMs preparation are addressed. The fabrication technique can be used to improve membrane performance in a number of ways, including resilience to extremes in process conditions and higher mixture resolution when separating gases and liquids. After that, membrane characterization is performed to analyze the membrane's structural and morphological properties. Based on that, critical evaluation of the performances of the MMMs based on the characterization of the membrane is evaluated in context. Finally, the opportunities, as well as future prospects for the integration of MMMs units for process intensification in various sectors, are also significant of the review.
  • Publication
    Synthesis of zinc oxide nanoparticles via cellar spider extract for enhanced functional properties in antimicrobial activities
    ( 2024-06)
    Jasni Mohamed Ismail
    ;
    Muhammad Nur Aiman Uda
    ;
    M. A. R. Irfan
    ;
    Mohd Khairul Rabani Hashim
    ;
    Zainal Abidin Arsat
    ;
    Uda Hashim
    ;
    Hafiza Shukor
    ;
    M. N. Afnan Uda
    ;
    Lokman Hakim Ibrahim
    ;
    Shahidah Arina Shamsuddin
    ;
    Nor Azizah Parmin
    ;
    Muzamir Isa
    ;
    Mohamad Zaim Mohamad Zain
    ;
    R. A. Ilyas
    ;
    Tijjani Adam
    This study explores the green synthesis of zinc oxide nanoparticles (ZnO NPs) using cellar spider extracts as a sustainable alternative to traditional methods involving hazardous chemicals and radiation. The spider extracts effectively reduced zinc acetate dihydrate, yielding white precipitates indicative of ZnO NPs. Characterization through SEM revealed diverse morphologies, including spherical, rod-like, hexagonal, and uneven particles forming platelet-like aggregates. Further analyses, such as HPM, 3D nanoprofiler, and EDS, provided insights into size, shape, morphology, surface chemistry, thermal stability, and optical characteristics, quantifying the intended properties of the synthesized ZnO NPs. Antibacterial assays against E. coli and B. subtilis demonstrated significant antibacterial activity, affirming the nanoparticles' potential for antimicrobial applications. This green synthesis approach, validated through comprehensive characterization and quantitative measurements, offers a promising and environmentally friendly route for producing functional ZnO NPs.
  • Publication
    Inhibition Study on the Growth of Clostridium Saccharoperbutylacetonicum N1-4 (ATCC 13564) for the Production of Biobutanol in ABE Fermentation
    ( 2023-01-01)
    Amin M.A.
    ;
    Hafiza Shukor
    ;
    Shoparwe N.F.
    ;
    Makhtar M.M.Z.
    ;
    Abdeshahian P.
    ;
    Oladokun S.O.
    In this present study, the inhibition effect of different concentrations of sugar degradation products in upstream processing (Hydroxymethylfurfural (HMF) and Furfural) and butanol as product inhibition in downstream processing on the growth of Clostridium saccharoperbutylacetonicum N1-4 (ATCC 13564) for the production of biobutanol in ABE Fermentation has been investigated. It was found that the presence of HMF and Furfural is non-toxic to cell growth and biobutanol production at concentrations below 3 g/L in the fermentation medium. The specific growth rate for both HMF and furfural was 0.067 h−1 and 0.066 h−1 respectively which is very close to the control medium without any inhibitor addition (0.068 h−1). Surprisingly, the addition of 1 g/L HMF has improved the yield of biobutanol from 0.020 g/g (control) to 0.034 g/g and the addition of 1 g/L Furfural has improved the yield of biobutanol to 0.042 g/g. Butanol inhibition study on the growth of C. saccharoperbutylacetonicum N1-4 (ATCC 13564) shows the decrease of specific growth rate from 0.071 to 0.065 h−1 when 5 g/L butanol was added. 15 g/L of butanol addition has caused a significant drop in the specific growth rate to 0.011 h−1 with an inhibitory effect of 85.7%. This result reveals that sugar degradation product has an inhibitory effect on the growth of microorganisms and biobutanol production at a certain concentration, and this ABE fermentation suffers from product inhibition. Therefore, the development of a robust strain is necessary to make this biobutanol industrially competitive even in the presence of the inhibitory compound.