Malaysian Journal of Analytical Sciences Vol 24 No 6 (2020): 1013 - 1023

 

 

 

 

CELLULOSE ACETATE-TiO₂ PHOTOCATALYTIC HOLLOW FIBRE MEMBRANE FOR DEGRADATION OF METHYLENE BLUE

 

(Membran Fiber Berongga Fotomangkin Selulosa Asetat-TiO₂ bagi Degradasi Metilena Biru)

 

Siti Wafiroh*, Miriam R. Prananda, Linda Yuliana, Pratiwi Pudjiastuti, Abdulloh

 

Department of Chemistry, Faculty of Science and Technology,

Airlangga University, Surabaya, Indonesia

 

*Corresponding author:  sitiwafiroh@fst.unair.ac.id

 

 

Received: 18 July 2019; Accepted: 20 July 2020; Published:  10 December 2020

 

 

Abstract

Methylene blue (MB) used in the textile industry can cause environmental damage. Photocatalytic hollow fibre membrane (PHFM) was employed in the degradation of synthetic MB dye. This research aimed to determine the optimum concentration of TiO₂ addition on the characteristic and performance of cellulose acetate-TiO₂ PHFM for the degradation of synthetic MB dye. Hollow fibre membrane was prepared from the phase inversion method using a dope solution with the ratio of CA, formamide, and acetone of 22%:27%:51%, and TiO₂ was then added with various concentrations of 0.10%, 0.15%, 0.20%, 0.25%, and 0.30% (w/w). The results showed that the optimum concentration of TiO₂ addition to the hollow fibre membrane was 0.25% (w/w). The characterisation of PHFM involved strain, stress, Young’s modulus, flux, rejection, SEM, FTIR, and efficiency degradation for MB, while the characterisation of CA-TiO₂ PHFM involved thickness, stress, strain and Young’s Modulus, i.e., 0.15 mm, 5.5 × 10² kN/mm², 0.13, and 4.2 × 10³ kN/mm², respectively. The flux and rejection performance of PHFM with MB feed were 25.66 L/m².h and 94.8%, respectively. The total efficiency of CA-TiO₂ PHFM application for MB degradation was 98.9%, and waste textile dye was 82.6%. PHFM was capable of degrading the synthetic MB.

 

Keywords: photocatalytic, hollow fibre membrane, cellulose acetate, TiO₂, methylene blue

 

Abstrak

Metilena biru (MB) yang digunakan dalam industri tekstil boleh menyebabkan kerosakan alam sekitar. Membran fiber berongga fotomangkin (PHFM) digunakan dalam pemerosotan pewarna MB sintetik. Kajian ini bertujuan untuk menentukan kepekatan optimum penambahan TiO₂ terhadap ciri dan prestasi PHFM selulosa asetat–TiO₂ untuk pemerosotan pewarna MB sintetik. Membran fiber berongga dihasilkan melalui kaedah songsangan fasa menggunakan larutan dop dengan nisbah CA, formamida, dan aseton pada 22%:27%:51%, dan TiO₂ kemudiannya ditambah pada pelbagai kepekatan sebanyak 0.10%, 0.15%, 0.20%, 0.25%, dan 0.30% (w/w). Keputusan menunjukkan kepekatan optimum penambahan TiO₂ kepada membran gentian geronggang pada 0.25% (w/w). Pencirian PHFM melibatkan terikan, tegasan, modulus Young, fluks, penyingkiran, SEM, FTIR, dan kecekapan pemerosotan MB, manakala pencirian CA-TiO₂ PHFM melibatkan ketebalan, tegasan, terikan, dan modulus Young, masing-masing pada 0.15 mm, 5.5 × 10² kN/mm², 0.13, and 4.2 × 10³ kN/mm². Prestasi fluks dan penyingkiran PHFM dengan suapan MB masing-masing ialah 25.66 L/m².h and 94.8%. Kecekapan aplikasi CA–TiO₂ PHFM bagi pemerosotan MB ialah 98.9%, dan sisa pewarna tekstil ialah 82.6%. PHFM mampu degradasi MB sintetik.

 

Kata kunci: fotomangkin, membrane fiber berongga, selulosa asetat, TiO₂, metilena biru

 

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