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interfacial polymerization on the performance of nanofiltration membranes for desalination, organic, and micropollutants

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 12,   Pages 2025-2036 doi: 10.1007/s11705-023-2356-2

Abstract: Chemistry of the polyamide active layer of a desalination membrane is critical in determining both its physical and chemical properties. In this study, we designed and fabricated three novel membranes with different active layers using the crosslinkers: terephthaloyl chloride, isophthaloyl chloride, and trimesoyl chloride. The crosslinkers were reacted with an aqueous solution of an aliphatic tetra-amine. Because these crosslinkers differ in their structures and crosslinking mechanisms during interfacial polymerization, the resultant membranes also possess different structural properties. The water contact angle of the fabricated membranes also varies; the water contact angles of 4A-3P-TPC@PSF/PET, 4A-3P-TMC@PSF/PET, and 4A-3P-IPC@PSF/PET, are 68.9°, 65.6°, and 53.9°, respectively. Similarly, the desalination performance of resultant membranes also showed variations, with 4A-3P-TPC@PSF/PET, 4A-3P-IPC@PSF/PET, and 4A-3P-TMC@PSF/PET having a permeate flux of 17.14, 25.70, and 30.90 L·m−2·h−1, respectively, at 2.5 MPa. The 4A-3P-TPC@PSF/PET membrane exhibited extensive crosslinking with aliphatic linear amine, and cationic dye rhodamine B, MgCl2, and amitriptyline rejection rates of 98.6%, 92.7% and 80.9%, respectively. The 4A-3P-TMC@PSF/PET membrane showed mediocre performance, while 4A-3P-IPC@PSF/PET membrane showed even lower performance, with a 35% rejection of methyl orange dye.

Keywords： acid chlorides     covalent crosslinking     desalination     linear aliphatic amine     micropollutant removal     thin film composite membranes    

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Application of permanganate in the oxidation of micropollutants: a mini review

Xiaohong GUAN, Di HE, Jun MA, Guanghao CHEN

Frontiers of Environmental Science & Engineering 2010, Volume 4, Issue 4,   Pages 405-413 doi: 10.1007/s11783-010-0252-8

Abstract: As a green oxidant, permanganate has received considerable attention for the removal of micropollutantsTo provide a better understanding of the oxidation of organic micropollutants with permanganate, theoxidation kinetics of 32 micropollutants were compiled.The oxidation kinetics of micropollutants by permanganate were found to be first order with respect tobe elucidated in the future studies to better predict the performance of permanganate oxidation of micropollutants

Keywords： pharmaceuticals     endocrine disrupting chemicals (EDCs)     algal toxins     permanganate     oxidation    

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the electron transfer mechanisms of permanganate activation by carbon nanotube membrane for enhanced micropollutants

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 9, doi: 10.1007/s11783-023-1706-0

Abstract:

● A CNT filter enabled effective KMnO4 activation via facilitated electron transfer.

Keywords： KMnO4     Carbon nanotubes     Non-radical pathway     Electron transfer     Water treatment    

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Nanofiltration for drinking water treatment: a review

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 5,   Pages 681-698 doi: 10.1007/s11705-021-2103-5

Abstract: ., hardness, pathogen, and natural organic matter), but also paid attention to the removal of micropollutants

Keywords： nanofiltration     drinking water     disinfection byproducts     micropollutants     selectivity    

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Preparation of a permanent magnetic hypercrosslinked resin and assessment of its ability to remove organic micropollutants

Wei WANG,Yan MA,Qing ZHOU,Chendong SHUANG,Mancheng ZHANG,Aimin LI

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 1,   Pages 96-104 doi: 10.1007/s11783-014-0724-3

Abstract: based on a novel permanent magnetic hypercrosslinked resin W150 was proposed for the removal of organic micropollutants

Keywords： permanent magnetic resin     organic micropollutant     pore size     molecular size     adsorption    

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Effectiveness of tertiary treatment processes in removing different classes of emerging contaminants from domestic wastewater

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 11, doi: 10.1007/s11783-022-1583-y

Abstract:

● Different advanced treatment processes were tested for ECs removal from wastewater.

Keywords： Micropollutants     Wastewater     PAC     Membranes     UV     Tertiary treatment    

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Sustainable Generation of Sulfate Radicals and Decontamination of Micropollutants via Sequential Electrochemistry Article

Wentian Zheng,Shijie You,Yuan Yao,Nanqi Ren,Bin Ding,Fang Li,Yanbiao Liu

Engineering 2023, Volume 30, Issue 11,   Pages 144-152 doi: 10.1016/j.eng.2022.12.005

Abstract:

The removal of emerging micropollutants in the aquatic environment remains a global challenge.Herein, we develop an advanced chemical-free strategy for micropollutants decontamination that is solely·– are powerful reactive species that enable the unselective degradation of micropollutantsalso reveal the effectiveness of the proposed system for the degradation of a wide array of emerging micropollutantsThis work provides the first proof-of-concept demonstration using ubiquitous sulfate for micropollutants

Keywords： Advanced oxidation     Chain reaction     Sulfate radical     Micropollutants     Sequential electrochemistry    

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Impacts of backwashing on micropollutant removal and associated microbial assembly processes in sand filters

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 3, doi: 10.1007/s11783-023-1634-z

Abstract:

● Backwashing in sand filters with 2-h and 4-h EBCTs was simulated.

Keywords： Sand filter     Backwashing     Recovery     Micropollutants     Community composition    

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Title Author Date Type Operation

interfacial polymerization on the performance of nanofiltration membranes for desalination, organic, and micropollutants

Journal Article

Application of permanganate in the oxidation of micropollutants: a mini review

Xiaohong GUAN, Di HE, Jun MA, Guanghao CHEN

Journal Article

the electron transfer mechanisms of permanganate activation by carbon nanotube membrane for enhanced micropollutants

Journal Article

Nanofiltration for drinking water treatment: a review

Journal Article

Preparation of a permanent magnetic hypercrosslinked resin and assessment of its ability to remove organic micropollutants

Wei WANG,Yan MA,Qing ZHOU,Chendong SHUANG,Mancheng ZHANG,Aimin LI

Journal Article

Effectiveness of tertiary treatment processes in removing different classes of emerging contaminants from domestic wastewater

Journal Article

Sustainable Generation of Sulfate Radicals and Decontamination of Micropollutants via Sequential Electrochemistry

Wentian Zheng,Shijie You,Yuan Yao,Nanqi Ren,Bin Ding,Fang Li,Yanbiao Liu

Journal Article

Impacts of backwashing on micropollutant removal and associated microbial assembly processes in sand filters

Journal Article