Aquatic environment

Fabrication of asymmetric poly (m-phenylene isophthalamide) nanofiltrationmembrane for chromium(VI) removal

Xiaojing Ren , Changwei Zhao , Songshan Du , Tao Wang , Zhaokun Luan , Jun Wang , Deyin Hou


Received November 16, 2009,Revised March 01, 2010, Accepted , Available online

Volume 22,2010,Pages 1335-1341

  • Summary
  • References
  • Related Articles
The feasibility of employing nanofiltration for the removal of chromium(VI) from wastewater was investigated. Poly (m-phenylene isophthalamide) (PMIA) was used to fabricate asymmetric nanofiltration membrane through the phase-inversion technique. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) were used to characterize the obtained membrane, and the both confirmed a much smoother surface which could reduce membrane fouling. The PMIA membrane showed di erent rejections to electrolytes in a sequence of Na2SO4 > MgSO4 > NaCl > MgCl2, which was similar to the sequence of the negatively charged nanofiltration membranes. Separation experiments on chromium(VI) solution were conducted at various operating conditions, such as feed concentration, applied pressure and pH. It is concluded that chromium(VI) could be e ectively removed from chromiumcontaining wastewater by the PMIA nanofiltration membranes while maintaining their pollution resistance under alkaline condition.

Copyright © Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved. 京ICP备05002858号-3