Elucidation of osmotic pressure generated by concentrated layer of settled particles and its application to desalination of seawater

2014 Fiscal Year Final Research Report

• Project/Area Number: 25550089
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Design and evaluation of sustainable and environmental conscious system
• Research Institution: Hosei University
• Principal Investigator: MORI Takamasa 法政大学, 生命科学部, 准教授 (20345929)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: 刺激応答性スラリー / ドロー溶液 / 正浸透

Outline of Final Research Achievements

It was found that the osmotic pressure of the concentrated layer formed by particle settling and thickening increased with an increase in particle concentration, however, the osmotic pressure was quite small as a draw solution of FO process. It was suggested that the combination of a polymer solution or inorganic salt solution which can produce a relatively large osmotic pressure due to its large number concentration of molecules should be necessary. Therefore, the alumina slurries containing a temperature responsive polymer, PNIPAM were prepared and investigated its potential as a novel draw solution. It was demonstrated that suction and separation of water could be easily and repeatedly done by changing the temperature of the stimulus responsive slurry.

Free Research Field

化学工学，粉体工学