Akmal Hadi Ma’Radzi
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Preferred name
Akmal Hadi Ma’Radzi
Official Name
Akmal Hadi, Ma’Radzi
Alternative Name
Ma'Radzi, Akmal Hadi
Akmal, H.
Ma'Radzi, A. H.
Akmal, H. M.R.
Main Affiliation
Scopus Author ID
16069115300
Researcher ID
DEI-2694-2022

Research Output

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  • Publication
    Comparative study on mechanisms of gases release from Ca-alginate beads
    ( 2024)
    Yee-Ming Peh
    ;
    Lee Boon Beng
    ;
    Farizul Hafiz Kasim
    ;
    Akmal Hadi Ma’Radzi
    ;
    Ahmad Radi Wan Yaakub
    ;
    Hafizah Mohd Johar
    ;
    D.F.A. Riza
    ;
    N. Izza
    ;
    K. Gustinasari
    ;
    I.K. Maharsih
    ;
    W.B. Sunarharum
    ;
    M. Nurcholis
    ;
    B.S.D. Dewanti
    ;
    V.T. Widayanti
    ;
    E. Mufidah
    ;
    I. Qisthiya
    ;
    D. Karadag
    ;
    S. Idrus
    ;
    H. Umakoshi
    ;
    Y.C. Lee
    ;
    D. Fatchurrahman
    ;
    M. Zhu
    ;
    K.A. Omwange
    ;
    T. Addini
    Calcium alginate (Ca-alginate) beads have attracted considerable attention as carriers for the controlled release of volatile compounds due to their biocompatibility and tunable properties. This study aimed to compare the release of ethylene and carbon dioxide gas from Ca-alginate beads. Ca-alginate beads were prepared from a sodium alginate solution containing ethephon and calcium carbonate as the gas-forming agent. The resulting solution was then extruded into a calcium chloride solution. The gas release behavior was studied by monitoring the concentration of released gases over time using gas detectors. Extrusion tip diameter, alginate concentration and gas-releasing agent concentration were systematically varied to assess their effect on the gas release rate. The results indicated distinct release patterns for ethylene and carbon dioxide gas. Ethylene gas exhibited a relatively slower and sustained release, while carbon dioxide gas exhibited a more rapid release. Moreover, the bead size influenced the gas release, with larger beads displaying faster release rates for ethylene and carbon dioxide gas. The concentration of alginate also played a role in modulating the release kinetics, with higher alginate concentration resulting in slower gas release. The findings have implications for designing and optimizing Ca-alginate-based systems for agricultural applications, including plant hormone delivery and modified atmosphere packaging.
  • Publication
    Synthesis and optimization study of microcrystalline cellulose (MCC) through acid hydrolysis from confiscated cigarette
    ( 2023-07)
    Kaarthiga Manogaran
    ;
    Akmal Hadi Ma’Radzi
    Tobacco is a type of plant which is used to make some products such as cigarettes and cigarettes are known to have a lot of harmful effects. There are few factors which causes the Royal Malaysian Custom Department to confiscate cigarettes which are white smuggled cigarette, contraband and false while storing the confiscated cigarettes for long time does not give any benefits. Therefore, cigarette butts which are chosen for this research study come from these confiscated cigarettes to utilize the waste. The tobacco was first undergoing alkaline pretreatment followed by bleaching process. Finally, hydrolysis process was done to synthesize microcrystalline cellulose (MCC). In this research, various acids (hydrochloric acid, sulphuric acid, and nitric acid) were used for the hydrolysis process. It was found that the best acid to synthesize MCC was nitric acid where the highest percentage of MCC yield was 76.83%. Scanning electron microscopy (SEM) shows the surface morphology of MCC which is observed to be like rod-like structure, while X-ray diffraction (XRD) results indicate that the crystalline and crystalline size of MCC was 74.28% and 4.61nm, respectively. FTIR spectra shows a successful removal of lignin structure from raw cigarette butts after hydrolysis process. Besides that, optimization of acid hydrolysis using Design of Expert software (DOE) were conducted where three independent variables were chosen which are hydrolysis time, hydrolysis temperature and acid concentration (nitric acid). Through this study, the highest yield of MCC obtained was 78% and the optimum conditions of parameters are 60 minutes, 60°C and 1.25M of nitric acid. The results of this study can be used to eliminate the hazards of the cigarette butts scattered in the environment and create the added value for the overall process.
  • Publication
    Synthesis and optimization study of Microcrystalline Cellulose (MCC) through acid hydrolysis from confiscated cigarette
    ( 2023-07)
    Kaarthiga Manogaran
    ;
    Akmal Hadi Ma’Radzi
    Tobacco is a type of plant which is used to make some products such as cigarettes and cigarettes are known to have a lot of harmful effects. There are few factors which causes the Royal Malaysian Custom Department to confiscate cigarettes which are white smuggled cigarette, contraband and false while storing the confiscated cigarettes for long time does not give any benefits. Therefore, cigarette butts which are chosen for this research study come from these confiscated cigarettes toutilize the waste. The tobacco was first undergoing alkaline pretreatment followed by bleaching process. Finally, hydrolysis process was done to synthesize microcrystalline cellulose (MCC). In this research, various acids (hydrochloric acid, sulphuric acid,and nitric acid) were used for the hydrolysis process. It was found that the best acid to synthesize MCC was nitric acid where the highest percentage of MCC yield was 76.83%. Scanning electron microscopy (SEM) shows the surface morphology of MCC which is observed to be like rod-like structure, while X-ray diffraction (XRD) results indicate that the crystalline and crystalline size of MCC was 74.28% and 4.61nm, respectively. FTIR spectra shows a successful removal of lignin structure from raw cigarette butts after hydrolysis process. Besides that, optimization of acid hydrolysis using Design of Expert software (DOE) were conducted where three independent variables were chosen which are hydrolysis time, hydrolysis temperature and acid concentration(nitric acid). Through this study, the highest yield of MCC obtained was 78% and the optimum conditions of parameters are 60 minutes, 60°C and 1.25M of nitric acid. The results of this study can be used to eliminate the hazards of the cigarette butts scattered in the environment and create the added value for the overall process
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