Nitrate removal from groundwater using negatively charged nanofiltration membrane

Lianpei Zou, Sitong Zhang, Jianyong Liu, Yi Cao, Guangren Qian, Yu You Li, Zhi Ping Xu

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

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/m2 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. [Figure not available: see fulltext.].

Original languageEnglish
Pages (from-to)34197-34204
Number of pages8
JournalEnvironmental Science and Pollution Research
Volume26
Issue number33
DOIs
Publication statusPublished - 2019 Nov 1

Keywords

  • Membrane permeate flux
  • Nanofiltration
  • Negative charge density
  • Nitrate rejection rate
  • Sodium 4-styrenesulfonate

ASJC Scopus subject areas

  • Environmental Chemistry
  • Pollution
  • Health, Toxicology and Mutagenesis

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