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Wetting and biofouling phenomena of membrane distillation - a study on surface roughness enhancement using TiO2 nanoparticles

Wetting and biofouling phenomena of membrane distillation - a study on surface roughness enhancement using TiO2 nanoparticles / Nurul Fatirah Mohd Shukor
Kekotoran adalah salah satu halangan yang besar untuk pertumbuhan membran penyulingan (MP) secara berterusan. Kekotoran dalam membran merupakan pengumpulan bahan-bahan yang tidak diingini di permukaan atau di dalam liang-liang membran yang mengakibatkan kesan ke atas prestasi keseluruhan MD. Ia menghalang pori-pori, menyebabkan penurunan resapann fluks, dan akhirnya boleh membawa kepada pembasahan membran hidrofobik oleh suapan air masin, seterusnya menjejaskan resapan. Dalam kajian ini, eksperimen penyulingan membran dijalankan pada pelbagai julat suhu antara 50-700C dengan suapan yang berbeza iaitu air tulen dan air sintetik. Membran PVDF dilarutkan dalam NMP dengan nisbah 20:80 mengikut peratusan berat. Kemudian, PVDF/pelarut dirawat dengan tiga dos yang berbeza bagi asid dan alkali TiO2 iaitu 0.05%, 0.5% dan 1% TiO2. Oleh sebab TiO2 mempunyai pertalian yang tinggi dengan air, prestasi membran pengangkutan bahan larut boleh diperbaiki. Hubungan antara PVDF dan TiO2 juga berpotensi mengubah permukaan PVDF dan mengimbangi dimensi sol semasa formasi filem. Permukaan dan keratan rentas membran diperhatikan dengan menggunakan SEM. Saiz liang dipilih untuk melihat perbezaan sebelum proses MD dan selepas proses MD menggunakan air tulen dan tiruan sebagai suapan. _______________________________________________________________________________________________________ Fouling in membrane distillation (MD) is one of the significant barriers for continued growth. Membrane fouling is the accumulation of unwanted materials on the surface or inside the pores of a membrane that results to a detrimental effect on the overall performance of MD. It will blocks the pores, causing a decline in permeate flux, and may eventually lead to wetting of a hydrophobic membrane by the saline feed, which will contaminating the permeate. In this study, membrane distillation experiments are running at various temperature range from 50 to 70 0C with different feeds which are pure water and synthetic water. The PVDF membrane is first dissolved in NMP by ratio 20:80 by weight percentage. Then, the PVDF/solvent is treated using three different dosages of acid and alkali TiO2 which 0.05% , 0.5% and 1%. Since TiO2 has high affinity to water, the membrane performance of solute transport can be improved. The association between PVDF and TiO2 also changed the surface potential of PVDF and offset the sol dimension during film formation.The surface and cross-section of the membranes were observed using SEM. Pore size is determined to see the differences before MD process and after MD process are test using pure and synthetic water as the feeds.
Contributor(s):
Nurul Fatirah Mohd Shukor - Author
Primary Item Type:
Final Year Project
Identifiers:
Barcode : 00003103802
Accession Number : 875006373
Language:
English
Subject Keywords:
Fouling; membrane distillation (MD); detrimental effect
First presented to the public:
6/1/2016
Original Publication Date:
5/17/2018
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Chemical Engineering
Citation:
Extents:
Number of Pages - 74
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2018-05-17 16:22:57.255
Date Last Updated
2019-01-07 11:24:32.9118
Submitter:
Mohd Jasnizam Mohd Salleh

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Wetting and biofouling phenomena of membrane distillation - a study on surface roughness enhancement using TiO2 nanoparticles1 2018-05-17 16:22:57.255