Removal of organic micro-pollutants (phenol, aniline and nitrobenzene) via forward osmosis (FO) process: Evaluation of FO as an alternative method to reverse osmosis (RO)

Water Research
Yue CuiChristian Maletzko

Abstract

In this study, we have explored and compared the effectiveness of using (1) lab-fabricated forward osmosis (FO) membranes under both FO and reverse osmosis (RO) modes and (2) commercially available RO membranes under the RO mode for the removal of organic micro-pollutants. The lab-fabricated FO membranes are thin film composite (TFC) membranes consisting of a polyamide layer and a porous substrate cast from three different materials; namely, Matrimid, polyethersulfone (PESU) and sulfonated polyphenylene sulfone (sPPSU). The results show that the FO mode is superior to the RO mode in the removal of phenol, aniline and nitrobenzene from wastewater. The rejections of all three TFC membranes to all the three organic micro-pollutants under the FO processes are higher than 72% and can be even higher than 90% for aniline when a 1000 ppm aromatic aqueous solution and 1 M NaCl are employed as feeds. These performances outperform the results obtained from themselves and commercially available RO membranes under the RO mode. In addition, the rejection can be maintained even when treating a more concentrated feed solution (2000 ppm). The removal performance can be further enhanced by using a more concentrated draw solution (2 M). The water...Continue Reading

References

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Nov 19, 2013·Environmental Science & Technology·Ming XieMenachem Elimelech
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Citations

Aug 28, 2016·Environmental Science and Pollution Research International·Pardeep SinghPradeep Kumar Mishra
Dec 25, 2019·Environmental Science and Pollution Research International·Muthamilselvi PonnuchamyKarthikeyan Ramasamy
Apr 14, 2018·Nature Communications·Yue Cui, Tai-Shung Chung
Feb 8, 2019·Separation and Purification Technology·Suhas P DharupaneediTejraj M Aminabhavi
Feb 18, 2020·Water Research·Guanglei QiuYen-Peng Ting
Jan 9, 2020·ACS Applied Materials & Interfaces·Mateo Del RioCarlos Palomino Cabello

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