Malaysian Journal of Analytical Sciences Vol 24 No 3 (2020): 350 - 362

 

 

 

 

 

PERFORMANCE OF CERAMIC MEMBRANE COATED WITH GRAPHENE OXIDE AS ALTERNATIVE FOR OILY WASTEWATER TREATMENT

 

(Prestasi Selaput Seramik Grafin Oksida Sebagai Pilihan Untuk Rawatan Air Sisa Berminyak)

 

Nurdiyana Nabilah Kasim¹, Sharifah Abdullah¹, Nur Asmaliza Mohd Noor²*

 

¹Faculty of Civil Engineering,

Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia

²Faculty of Civil Engineering,

Universiti Teknologi MARA Pahang, Lintasan Semarak 26400 Jengka, Pahang, Malaysia

 

*Corresponding author:  nurasmaliza@uitm.edu.my

 

 

Received: 20 November 2019; Accepted: 5 April 2020; Published:  9 June 2020

 

 

Abstract

The high demand for liquefied natural gas (LNG) contributes to the increasing production of LNG thus leading to the increment of oily wastewater. The membrane technology shows a very promising alternative to replace the conventional method to treat oily wastewater. The objectives of this study are to synthesize graphene oxide (GO) as a modifier to graphitic carbon nitride (g-C₃N₄) for alumina ceramic membrane, to characterize the structure of nanosheet and bulk of graphitic carbon nitride, graphene oxide and g-C₃N₄/GO composite which leads to the study of the performance of g-C₃N₄/GO coated alumina ceramic photocatalytic membrane to degrade oil in oily wastewater. The methodology started with the material preparation, photocatalyse membrane preparation and the characterization of material using X-ray diffraction (XRD), Fourier Transformation Infrared (FTIR) analysis, Brunauer Emmet Teller (BET) surface area analyses and UV-Vis-NIR spectrophotometer analysis. The last method is the degradation of methylene blue (MB) dye and photocatalytic study degradation of oil in wastewater using synthesis oily wastewater. The results indicated the g- C₃N₄/GO reduced 73.79% of the MB dye compared to 38.85% and 62.71% for bulk g-C₃N₄ and g-C₃N₄ nanosheet respectively. The g-C₃N₄/GO composite photocatalyst showed remarkable photocatalytic efficiency rather than bulk g-C₃N₄ and g-C₃N₄ nanosheet. Thus, the introduction of GO into g-C₃N₄ has improved the charge separation efficiency of g-C₃N₄ and improving the organic degradation potential of g-C₃N₄.

 

Keywords:  alumina, g-C₃N₄, graphene oxide, photocatalytic membrane, oily wastewater

 

Abstrak

Permintaan yang tinggi terhadap gas asli cecair (LNG) menyumbang kepada peningkatan pengeluaran LNG sehingga mengakibatkan pertambahan terhadap air sisa berminyak. Teknologi selaput menjadi pilihan yang menggantikan kaedah konvensional dalam merawat air sisa berminyak. Objektif kajian ini adalah untuk melakukan sintesis grafin oksida (GO) sebagai pengubahsuai karbon nitrida grafit (g-C₃N₄), untuk memperincikan struktur lapisan nano, karbon nitrida grafit, grafin oksida dan g-C₃N₄/GO komposit yang membawa kepada kajian prestasi selaput fotomangkin seramik alumina bersalut g-C₃N₄/GO untuk degradasi minyak dalam air sisa berminyak. Kaedah kajian bermula dengan penyediaan bahan, penyediaan selaput fotomangkin dan pencirian bahan menggunakan pembelauan sinar-X (XRD), analisis inframerah trasnformasi Fourier (FTIR), analisis kawasan permukaan Brunauer Emmet Teller (BET) dan analisis spektrofotometer UV-Vis-NIR. Kaedah terakhir adalah degradasi pewarna metilena biru (MB) dan kaedah fotomangkin dalam degradasi minyak dalam air sisa menggunakan jenis tiruan. Keputusan kajian ini telah menunjukkan bahawa g-C₃N₄/GO berkurang kepada 73.79% daripada pewarna MB berbanding 38.85% untuk g-C₃N₄ dan 62.71% untuk g-C₃N₄ lapisan nano. Manakala kaedah fotomangkin bagi komposit g-C₃N₄/GO menunjukkan kecekapan fotomangkin yang luar biasa berbanding g-C₃N₄ dan g-C₃N₄ lapisan nano. Oleh itu, pengenalan GO ke dalam g-C₃N₄ telah meningkatkan kecekapan g-C₃N₄ sebagai agen pemisahan sekali gus meningkatkan potensi g-C₃N₄ sebagai degradasi organik.

 

Kata kunci:  alumina, g-C₃N₄, grafin oksida, fotokatalik, selaput, air sisa berminyak  

 

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