Mohd Faidz Mohamad Shahimin
Thumbnail Image
Preferred name
Mohd Faidz Mohamad Shahimin
Official Name
Mohd Faidz , Mohamad Shahimin
Alternative Name
Mohamad Shahimin, Mohd Faidz
Mohamad Shahimin, M. F.
Shahimin, M. F.
Main Affiliation
Scopus Author ID
57006554500
Researcher ID
B-9547-2018

Research Output

Filters

7
7
Reset filters

Settings
Now showing 1 - 7 of 7
  • Publication
    Biodegradation of 2-methylpentane in fluid fine tailings amended with a mixture of iso-alkanes under sulfate-reducing conditions
    ( 2023-09-01)
    Mohd Faidz Mohamad Shahimin
    ;
    Siddique T.
    Anaerobic microorganisms in Canada Natural Upgrading Limited (CNUL) fluid fine tailings (FFT) are sustained by residual solvent hydrocarbons. Although FFT are methanogenic in nature, sulfate-reducing microorganisms represent a significant portion of FFT bacterial community. In this study, we examined biodegradation of three iso-alkanes (2-methylbutane, 2-methylpentane, and 3-methylpentane), representing major iso-alkanes in paraffinic solvent, in CNUL FFT under sulfate-reducing conditions. During ~1100 days of incubation, only 2-methylpentane was degraded partially, whereas 2-methylbutane and 3-methylpentane were not degraded. During active degradation of 2-methylpentane, the bacterial community was dominated by Anaerolineaceae followed by Syntrophaceae, Peptococcaceae, Desulfobacteraceae, and Desulfobulbaceae. The archaeal community was co-dominated by acetoclastic (Methanosaetaceae) and hydrogenotrophic (Methanobacteriaceae) methanogens. This study underlines the limited capability of the microbial community indigenous to CNUL FFT in degrading recalcitrant iso-alkanes under sulfate-reducing conditions.
  • Publication
    Potential of oil palm trunk starch as flocculant for contaminant of emerging compound removal
    ( 2021-09-06)
    Mohd Amin M.F.
    ;
    Mat Rasat M.S.
    ;
    Ahmad M.I.
    ;
    Aftar Ali N.S.
    ;
    Muda K.
    ;
    Zaidi N.S.
    ;
    Ismail S.
    ;
    Mohd Faidz Mohamad Shahimin
    ;
    Mohd Amin M.A.
    ;
    Salam M.A.
    In this preliminary study, a natural flocculant is developed from an oil palm trunk. The flocculant further tested for its ability in turbidity and COD removal with additional of atrazine in wastewater and demineralised water matrix. At the optimum dosage of 20mg/L, the developed cationic OPT starch able to remove around 95% turbidity and 85% COD. In addition, the cationic OPT starch also show the ability to remove spiked atrazine from both water matrixes to the maximum range of 55-85%. In conclusion, the developed oil-palm based flocculant show great potential for real-world application with added cost-effective benefits.
  • Publication
    Uncovering Anaerobic Hydrocarbon Biodegradation Pathways in Oil Sands Tailings from Two Different Tailings Ponds via Metabolite and Functional Gene Analyses
    ( 2024-01-01)
    Mohd Faidz Mohamad Shahimin
    ;
    Tariq Siddique
    Oil sands tailings, a slurry of alkaline water, silt, clay, unrecovered bitumen, and residual hydrocarbons generated during bitumen extraction, are contained in ponds. Indigenous microbes metabolize hydrocarbons and emit greenhouse gases from the tailings. Metabolism of hydrocarbons in tailings ponds of two operators, namely, Canadian Natural Upgrading Limited (CNUL) and Canadian Natural Resources Limited (CNRL), has not been comprehensively investigated. Previous reports have revealed sequential and preferential hydrocarbon degradation of alkanes in primary cultures established from CNUL and CNRL tailings amended separately with mixtures of hydrocarbons (n-alkanes, iso-alkanes, paraffinic solvent, or naphtha). In this study, activation pathway of hydrocarbon biodegradation in these primary cultures was investigated. The functional gene analysis revealed that fumarate addition was potentially the primary activation pathway of alkanes in all cultures. However, the metabolite analysis only detected transient succinylated 2-methylpentane and 2-methylbutane metabolites during initial methanogenic biodegradation of iso-alkanes and paraffinic solvent in all CNUL and CNRL cultures amended with iso-alkanes and paraffinic solvent. Under sulfidogenic conditions (prepared only with CNUL tailings amended with iso-alkanes), succinylated 2-methylpentane persisted throughout incubation period of ~ 1100 days, implying dead-end nature of the metabolite. Though no metabolite was detected in n-alkanes- and naphtha-amended cultures during incubation, assA/masD genes related to Peptococcaceae were amplified in all CNUL and CNRL primary cultures. The findings of this present study suggest that microbial communities in different tailings ponds can biodegrade hydrocarbons through fumarate addition as activation pathway under methanogenic and sulfidogenic conditions.
  • Publication
    FPGA based Quantum Key Distribution Electronic System for Multipurpose Optical Setup and Protocols
    ( 2021-03-01)
    Aseri N.S.M.
    ;
    Ali N.
    ;
    Yusof N.R.
    ;
    Endut R.
    ;
    Nor Azura Malini Ahmad Hambali
    ;
    Mohd Faidz Mohamad Shahimin
    ;
    Mohd Rashidi Che Beson
    ;
    Syed Alwee Aljunid Syed Junid
    The purpose of the FPGA electronic control system for Quantum Key Distribution (QKD) is to improve the analog electronic system in optoelectronic conversion. In the existence of the Mezzanine FPGA board, the main conversion of optical laser signal and optical detector signal can be improved. Mezzanine board can reduce the noise errors during the transmission and receiving a signal. Commonly, the optical signal needs to interface with an analog electronic system. This process requires the conversion process and interfacing with a digital signal to control the optical device and produce a good quality optical signal. The Mezzanine board can reduce the uncertainty during signal conversion and gives the digital capability to control the optical devices. The optical modulation signal for phase modulator control can achieve a full complete phase shift in the Mezzanine board. Plus, the voltage phase has capability up to 10 V with an accuracy of 2.4 µV. The time conversion for phase modulator can be extended in the Mezzanine board based on the digital control signal from FPGA. The system is capable to extend into multiple timing control to handle all the signal and to synchronize the signal in receiving, transmission or in between of the transmission. Thus, the system can handle one way or two-way QKD system accordingly.
  • Publication
    A mini review and bibliometric analysis of palm oil mill effluent in past five years
    ( 2023-01-01)
    Mohd Pauzi F.
    ;
    Muda K.
    ;
    Basri H.F.
    ;
    Omoregie A.I.
    ;
    Hong C.Y.
    ;
    Aftar Ali N.S.
    ;
    Mohamed Najib M.Z.
    ;
    Mohd Amin M.F.
    ;
    Ismail S.
    ;
    Mohd Faidz Mohamad Shahimin
    ;
    Farrah Aini Dahalan
    Indonesia and Malaysia are countries with the highest palm oil production globally. Indonesia is leading the list, followed by Malaysia and Thailand. Palm oil production generates countless benefits to the economy, environment, and society of the contributed countries. This industry provides high income and collection of methane gas for biogas generation and economy of the local community. However, despite the benefits, this industry has some difficulties, including treating the Palm Oil Mill Effluent (POME). POME contains a complex microbial structure and a high amount of oil, grease, and suspended solids. The existing treatment of POME consists of many drawbacks that lead to poor quality of the effluent and failure to meet the minimum requirement from the Department of Environment (DOE). Advance Oxidization Process (AOP), bio granulation, and ponding system are among the research that have been tried to treat POME. The local government still uses old-style treatment types such as Conventional Activated Sludge (CAS), ponding system, and anaerobic digester tank. This review paper presents a mini review of positive and negative consequences the palm oil industry as well as examine a bibliometric study towards the modern research development of the POME. This mini review concludes that the palm oil industry encourages the positive impact in economy, environment and social to the many parties especially country and local community. Besides that, the existing treatment of the POME have to be improved appropriate with the increment of the demand and era.
  • Publication
    Fringe projection phase shift variance effects on breast height imaging
    ( 2020-01-08)
    Norhaimi W.M.W.
    ;
    Zaliman Sauli
    ;
    Aris H.
    ;
    Retnasamy V.
    ;
    Mohd Faidz Mohamad Shahimin
    ;
    Vairavan R.
    Fringe projection has been garnering tremendous interest in the field of optical imaging. A wide range of surface measurement application including the medical application utilizes the fringe projection as means of surface metrology due to its non-invasive imaging modality. Although fringe projection has been applied in the medical field, minimal work has been conducted in the field of breast height imaging. In this work, a digital fringe projection system based on the phase shifting fringe projection is applied on a prosthetic tear drop breast. The fringe projection system consists of a digital projector, CCD camera and a computer. A phase shift variance of π/4, π/2 and 2π/3 from the fringe patterns are projected onto the breast sample using the three step phase shift fringe projection. The phase shift is varied to determine a suitable phase shift for the tear drop breast height imaging obtained from the phase map followed by the phase unwrapping process. The surface height profile obtained from the varied phase shift of the fringe projection system was compared to the height profile of the tear drop breast obtained from a direct method using the electronic digital vernier caliper. The results demonstrate that the fringe patterns phase shifted by 2π/3 produce a smooth phase map and unwrapped phase map which resulted in a clear and visible height profile of the tear drop breast with an almost identical height profile with the direct measurement method. The preliminary results from this study can be further extended to breast imaging with the presence of cancerous breast tumors.
      2
  • Publication
    Ultraviolet-visible absorbance analysis on solvent dependent effect of tropical plant anthocyanin extraction for dye-sensitized solar cells
    ( 2020-01-08)
    Suhaimi S.
    ;
    Nasri N.M.
    ;
    Wahab S.
    ;
    Ismail N.S.
    ;
    Mohd Faidz Mohamad Shahimin
    ;
    Zaliman Sauli
    In the current investigation, natural tropical dyes extracted from Mulberry, Roselle and Oxalis Triangularis were used as natural dye sensitiser. Four different extraction solvents, namely acetone, ethanol, a mixture of acetone and ethanol (v/v 1:2) and distilled water were employed to extract natural anthocyanin dyes from Mulberry, Roselle and Oxalis Triangularis. The natural dye extraction process was analysed using ultraviolet-visible spectroscopy, and the spectrum was taken in the wavelength range of 400 nm to 800 nm. The main photoactive component of Mulberry, Roselle and Oxalis Triangularis are anthocyanins compound which considered as an unstable pigment that undergo gradual degradation processes throughout storage or use. The spectra can be seen, that there are differences in its intensity where ethanol and acetone solvent was much higher absorbance peak vis-à-vis the other solvents. Mulberry and Roselle extraction in ethanol shows the high absorbance intensity at wavelength 550 nm, while Oxalis Triangularis extraction in acetone shows the higher absorbance at the peak of 664 nm. This indicates the presence of more anthocyanins compound that absorbs a higher number of photon energy light source. It is also appears that the dye extraction performance gradually degrade after seven days storage in dark condition. Mulberry and Oxalis Triangularis extraction in mixture of acetone and ethanol exhibit low degradation percentage about, 0% and 32%, respectively, while Roselle extraction in DI water reveal 0% degradation after 7 days.
      2