Journal
SEPARATION AND PURIFICATION TECHNOLOGY
Volume 223, Issue -, Pages 17-23Publisher
ELSEVIER
DOI: 10.1016/j.seppur.2019.04.057
Keywords
Humic acid removal; Graphene oxide; Ultrafiltration; Antifouling; Polyethersulfone
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Funding
- King Abdulaziz City for Science and Technology (KACST) through the summer scholarship program at the School of Biotechnology, Dublin City University, Dublin, Ireland
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In this study, hybrid polyethersulfone membranes incorporated with graphene oxide were synthesized by a non solvent induced phase separation approach. The influence of graphene oxide content on the membrane efficiency and fouling durability was elucidated, with emphasis on water flux, natural organic matter (NOM) rejection using humic acid as a model for NOM, and flux reduction due to fouling. The results revealed that the water flux increased with increasing GO content. It is worth noting that the MGO-5 membrane exhibits the highest J(w) value (340 L m(-2) h(-1)) among all the fabricated membrane, while the greatest J(HA) (193.78 L m(-2)h(-1)) value was obtained for MGO-3 membrane. NOM rejection was improved significantly by the incorporation of GO. The best rejection value of HA solution using the membranes was observed for MGO-3 at pH 7. The presence of GO also improved the membrane reusability and antifouling capabilities, due to the enhancement of the hydrophilicity of the GO-membrane surface.
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