Please use this identifier to cite or link to this item: http://ktisis.cut.ac.cy/handle/10488/6319
Title: Nanofiltration of brackish groundwater by using a polypiperazine membrane
Authors: Galanakis, Charis M.
Fountoulis, Georgios
Gekas, Vassilis 
Keywords: Nanofiltration
Calcium carbonate
Groundwater
Hardness
Water--Purification--Filtration
Wells
Issue Date: 2012
Publisher: Elsevier
Source: Desalination, 2012, volume 286, pages 277-284
Abstract: The purpose of the current study is to investigate the nanofiltration of brackish groundwater by using a polypiperazine membrane. The latter is a polymeric three-layer thin film with an active layer of semi-aromatic/aliphatic polyamide. Particularly, samples of different hardness and salinity values (up to 762mg CaCO 3 and 1803mg NaCl/L, respectively) were collected and treated under low transmembrane pressures (6-10bar), in a cross-flow nanofiltration module. Desalination monitoring was performed by determining performance parameters, total hardness and salinity retention coefficients of brackish samples during experiments. According to the results, the tested membrane was able to provide high hardness retention coefficients (70-76%), satisfactory permeate fluxes (15-47L·m -2·h -1) and high mineral fouling resistance (flux recovery values between 93 and 98%). A disadvantage of the process was the relatively low removal of salinity (44-66% for brackish groundwaters) that restricts the application in samples possessing salinity not much higher than ~1100mg NaCl/L. Finally, the retention of divalent and monovalent ions was governed by size effect and ion valance, probably due to the high ionic conditions of brackish samples and the poly-ampholytic nature of the membrane
URI: http://ktisis.cut.ac.cy/handle/10488/6319
ISSN: 00119164
DOI: 10.1016/j.desal.2011.11.035
Rights: © 2011 Elsevier B.V.
Appears in Collections:Άρθρα/Articles

Show full item record

SCOPUSTM   
Citations 1

32
checked on Dec 2, 2016

WEB OF SCIENCETM
Citations 10

18
checked on Nov 25, 2016

Page view(s) 50

1
checked on Dec 2, 2016

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.