Acta Phys. -Chim. Sin. ›› 2011, Vol. 27 ›› Issue (01): 228-232.doi: 10.3866/PKU.WHXB20110104

• PHYSICAL CHEMISTRY OF MATERIALS • Previous Articles     Next Articles

Behavior of Carbon Nanotube Membranes as Channels of Salt and Water in Forward Osmosis Process

JIA Yu-Xiang, LI Yan, HU Yang-Dong   

  1. College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, Shandong Province, P. R. China
  • Received:2010-07-12 Revised:2010-09-20 Published:2010-12-31
  • Contact: JIA Yu-Xiang E-mail:jiayx76@yahoo.com.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20806076) and National Key Basic Research Program of China (973) (2003CB615706).

Abstract:

We investigated the influence of carbon nanotube (CNT) size using CNTs including CNT(6,6), CNT(7,7), CNT(8,8), CNT(9,9), CNT(10,10), and CNT(11,11), and the influence of draw solution concentrations, such as 2.5, 3.75, and 5.0 mol·L-1, on the permeation behaviors of salt and water molecules through the biomimetically manufactured forward osmosis (FO) membranes. Nanosecondscale molecular dynamic simulations were carried out to obtain the relevant information, including the distributions of the water molecules, water flux, and salt permeation within the different CNT membranes. Simulation results show that the FO membrane incorporating CNT(8,8) can achieve the highest water flux and also the lowest salt permeation.

Key words: Forward osmosis, Membrane separation, Desalination, Carbon nanotube, Molecular dynamics simulation

MSC2000: 

  • O648