Now showing 1 - 3 of 3
  • Publication
    Effect of sintering temperature on composite hollow fibre membrane derived from hydroxyapatite cow bone and kaolin
    ( 2021-10-25)
    Kamarudin S.N.
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    ;
    Rasman S.N.S.
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    Hubadillah S.K.
    ;
    Pauzan M.A.B.
    ;
    Othman M.H.D.
    A modern application of composite hollow fibre membrane derived from hydroxyapatite cow bone and kaolin has been developed in wastewater treatment. The common fabrication method, a process that combined both phase inversion and sintering technique was used to fabricate the membranes. The hollow fibers membrane were developed using the spinning process by using a dope that have ratio of 20:20 (kaolin:cow bone hydroxyapatite). The sintering temperature that used in this study are 1000 ℃, 1100 ℃, 1200 ℃ and 1300 ℃. The effect of sintering temperature on hollow fiber membranes were characterized by scanning electron microscopy (SEM), 3-point bending and pure water flux. The results showed that the hollow fibre membrane sintered at 1200 ℃ showed a unique membrane’s morphology, the highest mechanical strength (13.33 Mpa) and a stable pure water flux (140.6 L/m2h).
  • Publication
    Novel ceramic hollow fibre membranes contactor derived from kaolin and zirconia for ammonia removal and recovery from synthetic ammonia
    ( 2021-11-15)
    Pauzan M.A.B.
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    Hubadillah S.K.
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    Mohamad Kamal S.N.E.A.
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    Othman M.H.D.
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    Puteh M.H.
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    Kurniawan T.A.
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    Abu Bakar S.
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    Abdullah H.
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    ;
    Naim R.
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    Sheikh Abdul Kadir S.H.
    The adverse effects of ammonia found in wastewater streams lead to the development of advanced water treatment technology, i.e. membrane contactor (MC). In this study, single layer hollow fibre membrane (SLZK) and dual layer hollow fibre membrane (DLZK) were prepared from zirconia and kaolin and modified into hydrophobic membrane through simple grafting process via fluoroalkylsilane (FAS) agent. The properties of membranes such as morphology, surface roughness, mechanical strength, wettability and liquid entry pressure were analysed through scanning electron microscopy (SEM), atomic force microscopy (AFM), 3-point bending strength, contact angle and LEPw setup. Finally, the performance of the membranes was also investigated towards ammonia removal via membrane contactor system. Our findings showed that hydrophobicity properties significantly improved for both SLZK and DLZK membranes after grafting modification process as indicated by the increase of contact angle value from 5° and 1° to 132.7° and ~180.0° respectively. Based on the morphological analysis, the surface of DLZK showed more porous structure as compared to the SLZK. In addition, DLZK also displayed the highest mechanical strength and contact angle reading of 125 MPa and ~180° respectively. This suggests that the DLZK showed an excellent membrane contactor performance with highest value of mass transfer coefficient (3.77 x 10-5 ms-1) and almost complete removal of ammonia removal (91%). Overall, these results implied that dual layer ceramic membrane developed from kaolin and zirconia could provide the basis for the development of alternative ceramic membrane with excellent properties for membrane contactor system.
  • Publication
    Performance study of hydroxyapatite cow bone based polysulfone mixed matrix membrane: Effect of hydroxyapatite morphology
    ( 2021-10-25)
    Rasman S.N.S.
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    ;
    Kamarudin S.N.
    ;
    Hubadillah S.K.
    ;
    Pauzan M.A.B.
    ;
    Othman M.H.D.
    In this work, polysulfone (PSf)/ hydroxyapatite (HAp) ultrafiltration mixed matrix membranes (MMMs) were prepared for wastewater treatment by using phase inversion method. The effect of hydroxyapatite (HAp) dispersion on the PSf/PVP membrane surface were investigated. Characterizations were done to observe the distribution of HAp on the membrane surface by using X-ray diffractometer (XRD) and scanning electron microscope (SEM). The XRD analysis showed the crystallinity of the HAp derived from cow bone. The dispersion of HAp in polymer matrix is a promising materials that can change the structure of the PSf membrane.