Malaysian Journal of Analytical Sciences Vol 24 No 1 (2020): 78 - 86

 

 

 

 

EFFECT OF BMIM-CHLORIDE ON PHYSIO CHEMICAL PROPERTIES OF NANOFIBER MEMBRANE FOR DOMESTIC WASTEWATER TREATMENT

 

(Kesan BMIM-Klorida ke atas Sifat-Sifat Fisio-Kimia Membran Nanogentian untuk Rawatan Sisa Air Domestik)

 

Ahmad Tarmizi Mohd 1, Nur Syakinah Abd Halim1, Mohd Dzul Hakim Wirzal1,4*, Muhammad Roil Bilad1, Nik Abdul Hadi Md Nordin1, Zulfan Adi Putra2, Abdull Rahim Mohd Yusoff3

 

1Chemical Engineering Department,

Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak, Malaysia

2PETRONAS Group Technical Solutions (GTS) Process Simulation and Optimization, 50450 Kuala Lumpur, Malaysia

3Faculty of Science,

Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia

4Center of Ionic Liquid Research (CORIL),

Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak, Malaysia

 

*Corresponding author:  mdzulhakim.wirzal@utp.edu.my

 

 

Received: 20 November 2019; Accepted: 21 January 2020

 

 

Abstract

Water is a vital source that is essential for all living things. With increasing demand towards water consumption, wastewater treatment is necessary. Nanofiber membrane (NFM) fabricated by electrospinning is suitable to be used as a filter especially for water treatment since it has huge surface area and high permeability compared to conventional membrane. However, fouling issue has always become a threat as it reduces membrane permeability over time. Therefore, surface modification methods are being applied to NFM where membrane surface property will be improved in order to reduce fouling. In this study, nylon 6,6 NFM was fabricated and soaked in 1-butyl-3-methylimidazolium chloride (BMIM-Cl). The coating layer of BMIM-Cl will reduce the effect of fouling while increasing membrane performance. This study also compares the ionic liquid concentration to nylon 6,6 NFM with respect to its performance and rejection. Based on the results, the coated layer of BMIM-Cl increases the permeability up to >400 L/m2 .h.bar while having superior rejection of chemical oxygen demand (COD) and phosphorus content over 90%. Furthermore, the time taken to reach steady-state (relates to fouling effect) increased with ionic liquid concentration, signifying the increase of BMIM-chloride concentration will reduce the effect of cake formation.

 

Keywords: nanofiber membrane, BMIM-chloride, wastewater

 

Abstrak

Air adalah sumber penting yang diperlukan oleh semua hidupan. Dengan meningkatnya permintaan terhadap penggunaan air, rawatan sisa air diperlukan. Membran nanogentian (NFM) yang diperbuat oleh putaran elektrik sesuai digunakan sebagai penapis terutama untuk rawatan air kerana ia mempunyai permukaan yang luas dan kebolehtelapan tinggi berbanding dengan membran konvensional. Walau bagaimanapun, masalah kerosakan (kotoran) sentiasa menjadi ancaman kerana ia mengurangkan kebolehtelapan membran dari masa ke semasa. Oleh itu, kaedah pengubahsuaian permukaan digunakan untuk NFM di mana sifat permukaan membran akan dipertingkatkan untuk mengurangkan kerosakan. Dalam kajian ini, nilon 6,6 NFM dihasilkan dan direndam di dalam 1-butil-3-metilimidazolium klorida (BMIM-Cl). Lapisan BMIM-Cl akan mengurangkan kesan kerosakan di samping meningkatkan prestasi membran. Kajian ini juga membandingkan kepekatan cecair ionik ke atas nilon 6,6 NFM sesuai dengan prestasi dan penyingkirannya. Berdasarkan hasil kajian, lapisan BMIM-Cl meningkatkan kebolehtelapan hingga > 400 L/m2. h.bar sementara mempunyai penyingkiran yang tinggi terhadap permintaan oksigen kimia (COD) dan kandungan fosforus lebih dari 90%. Tambahan pula, masa yang diambil untuk mencapai keadaan stabil (berkaitan dengan kesan kerosakan) meningkat dengan kepekatan cecair ionik, menandakan peningkatan kepekatan BMIM-Klorida akan mengurangkan kesan pembentukan kek.

 

Kata kunci:  membran nanogentian, BMIM-klorida, sisa air

 

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