Malaysian Journal of Analytical Sciences Vol 20 No 6 (2016): 1524 - 1529

DOI: http://dx.doi.org/10.17576/mjas-2016-2006-34

 

 

 

THE EFFECT OF POLYMER CONCENTRATION AND SURFACTANT TYPES ON NANOFILTRATION-SURFACTANT MEMBRANE FOR TEXTILE WASTEWATER

 

(Kesan Kepekatan Polimer dan Jenis Surfaktan pada Membran Surfaktan Penurasan-Nano untuk Air Sisa Tekstil)

 

Sarah Husnaini Zainal, Abdul Rahman Hassan*, Mohd Hafez Mohd Isa

 

Industrial Membrane Technology Laboratory, Department of Industrial Chemical Technology,

Faculty of Science and Technology,

Universiti Sains Islam Malaysia, 71800 Nilai, Negeri Sembilan, Malaysia

 

*Corresponding author: abdrahman@usim.edu.my

 

 

Received: 24 February 2015; Accepted: 27 October 2015

 

 

Abstract

In this study, an asymmetric nanofiltration-surfactant (NFS) membrane was prepared via simple dry/wet phase inversion technique. A newly dope formulation consisting of different surfactants (SDS, CTAB) and polymer concentration (17 wt% - 21 wt%) were developed. The effect of these parameters on dyes performance in terms of dyes flux, rejection and morphological structure were examined. Experimental data showed that, at different ranges of polymer concentration, NFS membranes shows low permeation flux of dyes ranging from 9.256 L/m²h to 14.315 L/m²h at 4 bar operating pressure. Significantly, the addition of SDS and CTAB surfactants were found to promote the increasing of dyes flux and rejection up to 79.698 L/m²h and 99.5% respectively. Addition of surfactant shows the membrane surface morphology with upper layer and support layer consists of finger-like structure, finger-like channel, macrovoids and spongy structure.

 

Keywords:  nanofiltration, surfactant, flux, rejection, morphological structure

 

Abstrak

Dalam kajian ini, membran surfaktan penurasan-nano telah disediakan melalui teknik fasa berbalik kering/basah mudah. Satu formulasi baru polimer yang terdiri daripada surfaktan yang berbeza (SDS,CTAB) dan kepekatan polimer (17 wt% - 21 wt%) telah disediakan. Kesan parameter ini terhadap prestasi pewarna dari segi fluks warna, penolakan dan struktur morfologi telah diperiksa. Data ujikaji menunjukkan bahawa, pada jarak yang berbeza kepekatan polimer, keputusan fluks membran NFS menyerap rendah pewarna antara 9.256 L/m²h kepada 14.315 L/m²h pada 4 bar tekanan operasi. Lebih penting lagi, penambahan SDS dan CTAB sebagai surfaktan didapati menggalakkan peningkatan fluks pewarna dan penolakan sehingga masing – masing adalah 79.698 L/m²h dan 99.5%. Penambahan surfaktan menunjukkan morfologi permukaan membran dengan lapisan atas dan lapisan sokongan yang terdiri daripada struktur jejari, saluran jejari, makrovoid dan struktur lembut.

 

Kata kunci:  penurasan-nano, surfaktan, fluks, penolakan, struktur morfologi

 

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