Malaysian Journal of Analytical Sciences Vol 21 No 2 (2017): 426 - 434

DOI: https://doi.org/10.17576/mjas-2017-2102-18

 

 

 

THE MORPHOLOGICAL PROPERTIES STUDY OF PHOTOCATALYTIC TIO₂/PVDF DUAL LAYER HOLLOW FIBER MEMBRANE FOR ENDOCRINE DISRUPTING COMPOUNDS DEGRADATION

 

 (Kajian Sifat Morfologi Membran Fotopemangkin Gentian Berongga Dwi Lapisan TiO₂/PVDF untuk Penguraian Sebatian Pengganggu Endokrin)

 

Roziana Kamaludin¹, Mohd Hafiz Dzarfan Othman¹*,Siti Hamimah Sheikh Abdul Kadir²,

Mukhlis A Rahman¹, Juhana Jaafar¹

 

¹Advanced Membrane Technology Research Centre (AMTEC),

Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia

 ²Institute of Medical Molecular Biotechnology, Faculty of Medicine, Sungai Buloh Campus,

Universiti Teknologi MARA, Jalan Hospital, 47000, Sungai Buloh, Selangor, Malaysia

 

*Corresponding author: hafiz@petroleum.utm.my

 

 

Received: 26 August 2016; Accepted: 8 January 2017

 

 

Abstract

Various Endocrine Disrupting Compounds (EDCs) either natural or synthetics have been identified including bisphenol A (BPA), dioxin, polychlorinated biphenyls, and dichlorodiphenyltrichloroethane (DDT). These compounds which present widely in the product of solvent industry, agricultural, pharmaceuticals and household convenience may directly or indirectly interrupt the normal function of endocrine system. Recently, the EDCs threats to human health have led to the increasing demand of clean water sources which excites a challenge for the contaminants removal processes. Conventional treatment methods may not completely remove the contaminants, meanwhile advanced oxidation process (AOPs) especially photocatalysis have been proven efficient in removing the contaminants. Even though photocatalysis is efficient in suspension of either nano- or microscale, the immobilizing TiO₂ in the membrane matrix for catalyst separation purposes have decreased the adsorption of organic substances on the TiO₂ surface with potential loss of TiO₂ during long-time usage. This lead to the emerging in the exploration and fabrication of dual layer hollow fiber (DLHF) membrane for better performance of immobilized TiO₂. Therefore, we exploit this fact to investigate the incorporation of photocatalysis into dual-layer hollow fiber membrane which are believed may improve the photocatalytic degradation and separation efficiency.  The FESEM results showed that both layers are compatible with each other and there are no delamination found between layers. The presence of outer layer does not influence the surface roughness; however improve the hydrophilicity and membrane strength. Altogether, photocatalytic dual layer hollow fiber (DLHF) membrane was successfully fabricated using co-extrusion technique.

 

Keywords:  dual layer, hollow fiber, TiO₂, photocatalytic

 

Abstrak

Pelbagai sebatian pengganggu endokrin sama ada semula jadi atau buatan telah dikenalpasti termasuk bisphenol A (BPA), dioxin, polychlorinated biphenyls, dan dichlorodiphenyltrichloroethane (DDT). Sebatian ini yang wujud secara meluas di dalam produk industri pelarut, pertanian, farmaseutikal, dan keperluan rumah mampu menggangu secara lansung atau tidak langsung fungsi normal sistem endokrin. Baru-baru ini, ancaman sebatian pengganggu endokrin kepada kesihatan manusia telah membawa kepada peningkatan permintaan sumber air bersih yang merangsang satu cabaran bagi proses penyingkiran bahan pencemaran.. Kaedah rawatan konvensional mungkin tidak membuang bahan pencemaran dengan sepenuhnya, tetapi proses pengoksidaan maju (AOP) terutama fotopemangkinan telah terbukti berkesan dalam menyingkirkan bahan pencemaran. Walaupun fotopemangkinan cekap dalam skala nano atau skala hablur pemangkin, immobilisasi TiO₂ ke dalam matriks membran untuk tujuan pemisahan pemangkin telah mengurangkan penyerapan bahan pencemar di permukaan TiO₂ dengan potensi kerugian TiO₂ untuk penggunaan yang lama. Ini membawa kepada penerokaan dan fabrikasi dwi lapisan gentian berongga (DLHF) membran untuk prestasi immobilisasi TiO₂ yang lebih baik. Oleh itu, kami mengeksploitasi fakta ini untuk menyiasat penubuhan fotopemangkinan ke dalam dwi-lapisan membran gentian berongga yang dipercayai boleh meningkatkan kecekapan fotopemangkin dalam proses degradasi dan pemisahan bahan pencemar. Keputusan FESEM menunjukkan bahawa kedua-dua lapisan serasi dengan satu sama lain dan tidak ada delaminasi di antara dua lapisan. Kehadiran lapisan luar tidak mempengaruhi kekasaran permukaan; bagaimanapun meningkatkan sifat hidrofilik dan membran kekuatan. Secara keseluruhan, dwi lapisan membran gentian berongga telah berjaya direka menggunakan teknik penyemperitan bersama.

 

Kata kunci:  dwi lapisan, gentian berongga, TiO₂, fotopemangkin

 

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