Removal and adsorption of diuron through nanofiltration membrane: the effects of ionic environment and operating pressures

Wang, Yuanfang, Shu, Li, Jegatheesan, Veeriah, and Gao, Baoyu (2010) Removal and adsorption of diuron through nanofiltration membrane: the effects of ionic environment and operating pressures. Separation and Purification Technology, 74 (2). pp. 236-241.

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Abstract

A study was conducted on the removal and adsorption of diuron through a 200 Da nanofiltration (NF) membrane. The effects of ionic environment (0.002, 0.02 and 0.2 M of NaCl, CaCl2·2H2O and MgCl2·6H2O solutions), and operating pressure (5 and 25 bar), on the removal and adsorption of diuron, were investigated. There was a gradual increase in the removal efficiency with an increase in ionic strength. However, a better removal performance of NF membrane was achieved with the presence of intermediate ionic strength (0.02 M of NaCl). The presence of the highest ionic strength did not exhibit the highest removal efficiency for diuron. Moreover, ionic strength had a much more significant influence on the removal of diuron at a lower operating pressure (5 bar). The adsorption results indicated that there was a shielding effect of ionic strength on the adsorption of diuron, which was stronger at 5 bar. In contrast, the removal of diuron decreased significantly as the concentration of divalent cations increased at 25 bar. The experimental results also showed that the size exclusion mechanism seemed to be significant with the presence of electrolyte for the removal of diuron through the NF membrane.

Item ID: 16862
Item Type: Article (Refereed Research - C1)
Keywords: nanofiltration; ionic environment; diuron removal; adsorption; applied pressure
ISSN: 1873-3794
Date Deposited: 15 Apr 2011 03:20
FoR Codes: 09 ENGINEERING > 0907 Environmental Engineering > 090703 Environmental Technologies @ 100%
SEO Codes: 96 ENVIRONMENT > 9611 Physical and Chemical Conditions of Water > 961101 Physical and Chemical Conditions of Water for Urban and Industrial Use @ 100%
Citation Count from Web of Science Web of Science 2
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