Mineral Source Water From Deep Sea Water

  • Author: ChemistryViews
  • Published: 03 December 2010
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA
  • Source / Publisher: AIChE Journal/John Wiley & Sons
  • Associated Societies: American Institute of Chemical Engineers (AIChE)
thumbnail image: Mineral Source Water From Deep Sea Water

Producing adjustable potable mineral water from deep sea water (DSW) becomes more and more prevailing because it is pure, free of land pollutants, and rich in vital mineral ions, such as magnesium and calcium. Its application, however, is limited considerably by the high concentration of sulfate ions in DSW. This problem may be solvable through adopting a membrane separation process.

Adopting a laboratory-scaled electrodialysis (ED) process, Sung-Hwa Lin, National Ilan University, Yilan City, Taiwan, and his team have investigated the performance of a monovalent anion exchange permselective membrane in the reduction of the concentration of sulfate ions during the production of mineral source water from DSW. The dependence of the separation efficiency of anions on the operating time and the applied DC voltage was investigated based on a brine having salinity of about 15 % prepared from DSW.

The experimental results reveal that if the applied DC voltage is high, the change in the liquid volume during ED is dominated by the ions transported and the effect of electroosmosis. In addition, the amount of Cl transported correlates roughly linearly with the operating time, and the transport of sulfate ions is found to be blocked by Cl, presumably because the pore size of the permselective layer is close to the size of sulfate ions.
Based on the constraints of high Cl output, low SO42− content, and low electrical energy consumption, a region representing the possible optimal operation conditions for the ED is constructed.


Article Views: 3318

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

If you would like to reuse any content, in print or online, from ChemistryViews.org, please contact us first for permission. more

Follow on Facebook Follow on Twitter Follow on YouTube Follow on LinkedIn Follow on Instagram RSS Sign up for newsletters

Magazine of Chemistry Europe (16 European Chemical Societies) published by Wiley-VCH