Masitah Hasan
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Preferred name
Masitah Hasan
Official Name
Masitah, Hasan
Alternative Name
Hasan, Masitah
Masitah, H.
Main Affiliation
Scopus Author ID
57217411844
Researcher ID
HLU-8488-2023

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  • Publication
    Sulfur dioxide removal using deep eutectic solvent–functionalized palm kernel shell–activated carbon
    (Springer, 2025-02)
    Wan Nur Amanna Wan Nuzi
    ;
    Muhammad Adli Hanif
    ;
    Naimah Ibrahim
    ;
    Farrah Aini Dahalan
    ;
    Nabilah Aminah Lutpi
    ;
    Masitah Hasan
    ;
    Raja Nazrul Hakim Raja Nazri
    ;
    Umi Fazara Md Ali
    The release of SO₂ into the atmosphere is concerning due to its role in acidification, which threatens living organisms and the environment. Adsorption processes using materials like chemically modified activated carbon (AC) have demonstrated strong potential for removing SO₂ before its release. This study evaluates the performance of AC derived from palm kernel shells, and AC functionalized with choline chloride-glycerol, a deep eutectic solvent (DES) (AC-DES), in removing SO₂ through breakthrough experiments conducted in a fixed bed reactor. AC and AC-DES achieved SO₂ adsorption capacities of 0.522 and 2.763 mg SO₂/g adsorbent, respectively. Characterization of the adsorbents indicated that DES functionalization significantly increased the number of active sites for SO₂ adsorption, leading to superior adsorption performance of AC-DES. The optimization of process parameters identified 40 °C and 1500 ppm inlet SO₂ concentration as the ideal conditions for optimal SO₂ adsorption. Experimental data fitted with three adsorption kinetic and isotherm models indicated that SO₂ adsorption onto AC-DES is best described by the Avrami kinetic model and the Sips isotherm model. Thermodynamics studies revealed that the process is exothermic, thermodynamically non-spontaneous, and goes from a random state to an ordered one. The findings suggest that SO₂ adsorption onto AC-DES follows a complex mixed mechanism involving both physisorption and chemisorption, with surface heterogeneity and adsorbate-adsorbent interactions playing a critical role in controlling the adsorption process.
  • Publication
    Comparative study of powdered activated carbon and granular activated carbon in metaldehyde adsorption: unraveling isotherm and kinetic insights
    (Wiley, 2024)
    Nur Salsabila Kamarudin
    ;
    Farrah Aini Dahalan
    ;
    Arina Azmina Ahmad Zubir
    ;
    Masitah Hasan
    ;
    Naimah Ibrahim
    ;
    Raja Nazrul Hakim Raja Nazri
    ;
    Nabilah Aminah Lutpi
    ;
    Nor Azizah Parmin
    Slug pellets contain metaldehyde, a potent substance that kills molluscs, which also harms the environment and human health by polluting water systems. Metaldehyde removal from wastewater has emerged as a possible treatment strategy utilizing activated carbon materials such as powdered activated carbon (PAC) and granular activated carbon (GAC). This study aims to compare and analyze the adsorption mechanisms and kinetics of these materials. SEM studies of PAC and GAC revealed unique morphological characteristics, with PAC having a finely textured surface and a well-defined porosity structure, and GAC having a granular structure with irregularly shaped particles. According to the BET analysis, PAC had a larger surface area and pore volume than GAC, which had a lower surface area and pore volume. The FTIR spectra of PAC and GAC samples reveal different types of bonds such as ―OH, O―H, C―H, C═O, C═C, and C―O which potentially affect their reactivity and interaction with metaldehyde. PAC performed better than GAC in removing metaldehyde from water, as it had a higher surface area and a wider range of pore sizes. The Langmuir isotherm and the pseudo-second-order kinetic model fit the experimental data well for this adsorption study.