Removal of antibiotics with different charges in water by graphene oxide membranes

Antibiotics are a large group of emerging organic pollutants with low concentration levels in the water. The presence of antibiotics will affect the ecological environment and human health. The removal of trace organic compounds by graphene oxide (GO) membranes has attracted extensive attention. Thi...

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Bibliographic Details
Published in:Journal of water reuse and desalination 2023-06, Vol.13 (2), p.220-232
Main Authors: Liang, Zimeng, Zhao, Xin, Huang, Weiqi, Qi, Huabiao, Wang, Can
Format: Article
Language:English
Subjects:
Adsorption
antibiotic
Antibiotics
Aqueous solutions
Calcium ions
Chloramphenicol
Chloromycetin
Chromatography
coexisting cation
crosslinked go membrane
Crosslinking
Ethylenediamine
Graphene
Ions
Membranes
nanofiltration
Organic compounds
Oxidation
Penicillin
Pollutants
Removal
Sensors
Wastewater
wastewater reclamation and reuse
Water quality
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Summary:Antibiotics are a large group of emerging organic pollutants with low concentration levels in the water. The presence of antibiotics will affect the ecological environment and human health. The removal of trace organic compounds by graphene oxide (GO) membranes has attracted extensive attention. This study investigated the removal of three differently charged antibiotics by GO membranes and the influence of water quality on the removal of antibiotics. It showed that a crosslinked ethylenediamine-GO (EDA-GO) membrane had better stability and higher antibiotic removal performance than a non-crosslinked GO membrane. Among the three antibiotics, penicillin (PNC) was negatively charged and had the highest removal efficiency due to steric effect and electrostatic repulsion. A low concentration (10 mmol L−1) of Na+ in water could increase the membrane flux but had no significant effect on the removal of antibiotics. Ca2+ could reduce the membrane flux and improve the removal of chloramphenicol (CAP) and PNC. The removal efficiencies of low-concentration antibiotics (500 μg L−1) were higher than those of high-concentration antibiotics (10 mg L−1). Furthermore, the removal of antibiotics under the condition of actual wastewater quality was higher than those in solutions prepared with ultrapure water. The EDA-GO membrane has great potential in the removal of antibiotics in wastewater.
ISSN:2709-6092
2220-1319
2709-6106
2408-9370
DOI:10.2166/wrd.2023.084