Subscribe Now Subscribe Today
Research Article
 

Effect of Ethanol Composition in the Coagulation Bath on Membrane Performance



Nora`aini Ali, Nadzifah A. Rahim, Asmadi Ali, W. Sani, W. Nik and Lam Su Shiung
 
Facebook Twitter Digg Reddit Linkedin StumbleUpon E-mail
ABSTRACT

Ethanol, a coagulation medium, plays an important role in producing high performance asymmetric nanofiltration membrane. Thus, the effect of ethanol composition in coagulation bath on the performance, morphology and properties of Polyethersulfones (PES) flat sheet membrane was studied. The performances of the PES membrane were obtained from the Pure Water Flux (PWF) experiment and salt solution rejection experiment. The results showed that the permeability coefficient (Pm) in the pressure range of 0-10 bar for ET 0 (100% water), ET 50 (50% ethanol) and ET 100 (100% ethanol) were 11.971, 8.464 and 3.0823 (m3 m–2 sec MPa), respectively, which showed that: Pm ET 0 > Pm ET 50 > Pm ET 100. The rejection range follows as ET 0 < ET 50 < ET 100, which were 0-10, 0-18 and 0-20%, respectively. The morphology of membranes were vary from finger-like to sponge-like with the increase of ethanol composition in coagulation bath. This shows that higher ethanol composition may create thick membrane layer and cause the water fluxes to be declined, thus enhancing the membrane rejection. It was found that ET 50 was the optimum ethanol composition for its high rejection with moderate flux and thus suitable for industrial application.

Services
Related Articles in ASCI
Similar Articles in this Journal
Search in Google Scholar
View Citation
Report Citation

 
  How to cite this article:

Nora`aini Ali, Nadzifah A. Rahim, Asmadi Ali, W. Sani, W. Nik and Lam Su Shiung, 2007. Effect of Ethanol Composition in the Coagulation Bath on Membrane Performance. Journal of Applied Sciences, 7: 2131-2136.

DOI: 10.3923/jas.2007.2131.2136

URL: https://scialert.net/abstract/?doi=jas.2007.2131.2136

REFERENCES
Alborzfar, M., G. Jonsson and C. Gron, 1998. Removal of natural organic matter from two types of humic ground waters by nanofiltration. Wat. Res., 32: 2983-2994.
Direct Link  |  

Deshmukh, S.P. and K. Li, 1998. Effect of ethanol composition in water coagulation bath on morphology of PVDF hollow fibre membranes. Natl. Univ. Singapore. J. Membrane Sci., 150: 75-85.

Fan, S.C., Y.C. Wang, C.L. Li, K.R. Lee, D.J. Liaw, H.P. Huang and J.Y. Lai, 2002. Effect of coagulation media on membrane formation and vapor permeation performance of novel aromatic polyamide membrane. Chung Yuan Univ. Taiwan. J. Membrane Sci., 204: 67-79.
Direct Link  |  

Kesting, R.E., 1985. Synthetic Polymeric Membranes a Structural Perspective. John Wiley and Sons, New York, pp: 31.

Mallevialle, J., P.E. Odendaal and M.R. Wiesner, 1996. Water Treatment Membrane Processes. A divison of the McGraw-Hill Companies, New York, pp: 2.13-2.14.

Mulder, M., 1996. Basic Principles of Membrane Technology. 2nd Edn., Kluwer Academic Publishers, Netherlands.

Tsui, E.M. and M. Cheryan, 2004. Characteristics of nanofiltration membranes in aquoes ethanol. Univ. Illinois, USA. J. Membrane Sci., 237: 61-69.
CrossRef  |  Direct Link  |  

©  2020 Science Alert. All Rights Reserved