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Article: NaHCO3 addition enhances water permeance and Ca/haloacetic acids selectivity of nanofiltration membranes for drinking water treatment

TitleNaHCO3 addition enhances water permeance and Ca/haloacetic acids selectivity of nanofiltration membranes for drinking water treatment
Authors
KeywordsCarbonate chemistry
Drinking water treatment
Haloacetic acids (HAAs)
Interfacial polymerization
Minerals/HAAs selectivity
Polyamide nanofiltration membrane
Issue Date15-Aug-2023
PublisherIWA Publishing
Citation
Water Research, 2023, v. 242 How to Cite?
AbstractThe existence of disinfection by-products such as haloacetic acids (HAAs) in drinking water severely threatens water safety and public health. Nanofiltration (NF) is a promising strategy to remove HAAs for clean water production. However, NF often possesses overhigh rejection of essential minerals such as calcium. Herein, we developed highly selective NF membranes with tailored surface charge and pore size for efficient rejection of HAAs and high passage of minerals. The NF membranes were fabricated through interfacial polymerization (IP) with NaHCO3 as an additive. The NaHCO3-tailored NF membranes exhibited high water permeance up to similar to 24.0 L m(-2) h(-1) bar(-1) (more than doubled compared with the control membrane) thanks to the formation of stripelike features and enlarged pore size. Meanwhile, the tailored membranes showed enhanced negative charge, which benefitted their rejection of HAAs and passage of Ca and Mg. The higher rejection of HAAs (e.g., > 90%) with the lower rejection of minerals (e.g., < 30% for Ca) allowed the NF membranes to achieve higher minerals/HAAs selectivity, which was significantly higher than those of commercially available NF membranes. The simultaneously enhanced membrane performance and higher minerals/HAAs selectivity would greatly boost water production efficiency and water quality. Our findings provide a novel insight to tailor the minerals/micropollutants selectivity of NF membranes for highly selective separation in membrane-based water treatment.
Persistent Identifierhttp://hdl.handle.net/10722/331275
ISSN
2023 Impact Factor: 11.4
2023 SCImago Journal Rankings: 3.596
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLong, L-
dc.contributor.authorPeng, LE-
dc.contributor.authorZhou, SH-
dc.contributor.authorGan, QM-
dc.contributor.authorLi, XH-
dc.contributor.authorJiang, JY-
dc.contributor.authorHan, JR-
dc.contributor.authorZhang, XR-
dc.contributor.authorGuo, H-
dc.contributor.authorTang, CYY-
dc.date.accessioned2023-09-21T06:54:16Z-
dc.date.available2023-09-21T06:54:16Z-
dc.date.issued2023-08-15-
dc.identifier.citationWater Research, 2023, v. 242-
dc.identifier.issn0043-1354-
dc.identifier.urihttp://hdl.handle.net/10722/331275-
dc.description.abstractThe existence of disinfection by-products such as haloacetic acids (HAAs) in drinking water severely threatens water safety and public health. Nanofiltration (NF) is a promising strategy to remove HAAs for clean water production. However, NF often possesses overhigh rejection of essential minerals such as calcium. Herein, we developed highly selective NF membranes with tailored surface charge and pore size for efficient rejection of HAAs and high passage of minerals. The NF membranes were fabricated through interfacial polymerization (IP) with NaHCO3 as an additive. The NaHCO3-tailored NF membranes exhibited high water permeance up to similar to 24.0 L m(-2) h(-1) bar(-1) (more than doubled compared with the control membrane) thanks to the formation of stripelike features and enlarged pore size. Meanwhile, the tailored membranes showed enhanced negative charge, which benefitted their rejection of HAAs and passage of Ca and Mg. The higher rejection of HAAs (e.g., > 90%) with the lower rejection of minerals (e.g., < 30% for Ca) allowed the NF membranes to achieve higher minerals/HAAs selectivity, which was significantly higher than those of commercially available NF membranes. The simultaneously enhanced membrane performance and higher minerals/HAAs selectivity would greatly boost water production efficiency and water quality. Our findings provide a novel insight to tailor the minerals/micropollutants selectivity of NF membranes for highly selective separation in membrane-based water treatment.-
dc.languageeng-
dc.publisherIWA Publishing-
dc.relation.ispartofWater Research-
dc.subjectCarbonate chemistry-
dc.subjectDrinking water treatment-
dc.subjectHaloacetic acids (HAAs)-
dc.subjectInterfacial polymerization-
dc.subjectMinerals/HAAs selectivity-
dc.subjectPolyamide nanofiltration membrane-
dc.titleNaHCO3 addition enhances water permeance and Ca/haloacetic acids selectivity of nanofiltration membranes for drinking water treatment-
dc.typeArticle-
dc.identifier.doi10.1016/j.watres.2023.120255-
dc.identifier.pmid37356158-
dc.identifier.scopuseid_2-s2.0-85163201995-
dc.identifier.volume242-
dc.identifier.isiWOS:001035708900001-
dc.publisher.placeOXFORD-
dc.identifier.issnl0043-1354-

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