News Column

Findings from Victoria University Broaden Understanding of Purification Technology

June 17, 2014

By a News Reporter-Staff News Editor at Journal of Technology -- New research on Purification Technology is the subject of a report. According to news reporting originating from Melbourne, Australia, by VerticalNews correspondents, research stated, "Heat treatment is believed to be an important step in controlling the morphology and properties of polymer based membranes. In this study, hybrid organic-inorganic membrane based on poly(vinyl alcohol) (PVA), maleic acid (MA) and tetraethyl orthosilicate (TEOS) was synthesised via a sol-gel route."

Our news editors obtained a quote from the research from Victoria University, "The effects of heating temperature and heating time on pervaporation separation performance of aqueous salt solution were studied in relation to swelling and hydrophilic properties, the free volume, salt transport properties, and water diffusivity of the membrane. The free volume of the hybrid membrane under different heat treatment conditions were well correlated with the pervaporation testing results. With increasing heating temperature or time, the fractional free volume of the hybrid membrane was reduced due to a more compact structure by crosslinking among PVA, MA and TEOS. As a result, the water flux decreased and the salt rejection increased."

According to the news editors, the research concluded: "The salt transport properties followed a similar trend as the water uptake, indicating the hydrated NaCl was solvated by water in the membrane phase."

For more information on this research see: Effect of heat treatment on pervaporation separation of aqueous salt solution using hybrid PVA/MA/TEOS membrane. Separation and Purification Technology, 2014;127():10-17. Separation and Purification Technology can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier -; Separation and Purification Technology -

The news editors report that additional information may be obtained by contacting Z.L. Xie, Victoria Univ, Inst Sustainabil & Innovat, Melbourne, Vic 8001, Australia. Additional authors for this research include M. Hoang, D. Ng, C. Doherty, A. Hill and S. Gray.

Keywords for this news article include: Melbourne, Purification Technology, Australia and New Zealand

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Source: Journal of Technology

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