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Nitrate removal from groundwater using negatively charged nanofiltration membrane
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Journal Article
Nitrate removal from groundwater using negatively charged nanofiltration membrane
2019
Overview
A commercial nanofiltration (NF) membrane was modified using poly(sodium 4-styrenesulfonate) (PSS) to improve the nitrate rejection from groundwater. Fourier transform infrared spectroscopy, thermogravimetric analysis, zeta potential, and water contact angle analyses were performed, showing that PSS was successfully coated onto the membrane with the surface negative charge density being enhanced. The results of nitrate removal tests showed that the best PSS concentration was 1.5 mg/L, with the nitrate rejection rate of 88.8% and the permeate flux of 27.0 L/m
2
h. The effect of initial nitrate concentration and solution pH on the nitrate removal performance of the modified NF membrane was investigated. The results indicate that the modified NF membrane can improve nitrate removal from actual groundwater, with little membrane permeate flux loss.
Graphical abstract
Publisher
Springer Science and Business Media LLC,Springer Berlin Heidelberg,Springer Nature B.V
Subject
/ Appropriate Technologies to Combat Water Pollution
/ Atmospheric Protection/Air Quality Control/Air Pollution
/ Earth and Environmental Science
/ Environmental Restoration and Remediation
/ Environmental Restoration and Remediation - methods
/ Fourier transform infrared spectroscopy
/ Nitrates
/ Sodium
/ Water Pollutants, Chemical - analysis
