Hydrophobic interpenetrating polyamide-PDMS membranes for desalination, pesticides removal and enhanced chlorine tolerance

Khairkar, Shyam R.; Pansare, Amol V.; Shedge, Amol A.; Chhatre, Shraddha Y.; Suresh, Akkihebbal K.; Chakrabarti, Subhananda; Patil, Vishwanath R.; Nagarkar, Amit A.

doi:10.1016/j.chemosphere.2020.127179

Cited by 23 publications

(7 citation statements)

References 36 publications

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“…The effect of hydrophobicity on the rejection efficiency and permeate flux was in line with the study by Khairkar et al [40]. It was also claimed that XLE membrane displayed a larger flux than BW30 membrane, classifying XLE membrane as a low pressure reverse osmosis (LPRO) membrane [41].…”

Section: Effect Of Membrane Characteristicssupporting

confidence: 85%

Critical Evaluation of Thin Film Composite Membrane on Pesticide Removal

Lee

Chong

Hoon

et al. 2022

AMST

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This study focuses on how operating pressure, pesticide characteristics, membrane materials, feed solution and draw solution affect the performance of thin film composite membranes on pesticides removal. The membrane separation discussed in this review involve nanofiltration (NF), reverse osmosis (RO) and forward osmosis processes (FO) (i.e., FO mode and pressure retarded osmosis (PRO) mode). High pressure shows positive effects on NF and RO membranes flux performances, but it could deform PRO membranes. Hydrophobic pesticides that are larger in size, negatively charged with small dipole moments will result in higher retention. Besides, ions in the feed solution increased the rejection efficiency and permeate flux of membrane whereas pesticides concentration has a negative effect on their retention. pH of feed solution determines the zeta potential of membrane. As for the draw solution, NaCl at higher concentration is recommended. This paper is crucial to give an overview on ways to improve the removal of pesticides with various thin film composite membranes.

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Section: Effect Of Membrane Characteristicssupporting

confidence: 85%

Critical Evaluation of Thin Film Composite Membrane on Pesticide Removal

Lee

Chong

Hoon

et al. 2022

AMST

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“…Moreover, only trace amounts of the hydrophobic nonionized CBZ could be extracted from both membranes under the high-intensity H 2 O 2 exposure of 4000 ppm-h (i.e., an H 2 O 2 exposure time of 1 h). The membrane surface with an organic hydrophobic polymer PA was demonstrated to adsorb the hydrophobic PPCP through surface affinity [ 46 ]. The adsorption amounts on the PA + PSf and PET layers for both membranes (0.5 ± 0.2 µg/cm 2 ) were significantly lower than those of the commercialized TFC NF and RO membranes (i.e., NF270, NF90, and XLE) in the range of 20–36 and 2 ± 0.1 µg/cm 2 for PA + PSf and PET layers [ 3 , 35 ], which may have been due to additional modification of the functional groups on the PA layer.…”

Section: Resultsmentioning

confidence: 99%

Enhancing H2O2 Tolerance and Separation Performance through the Modification of the Polyamide Layer of a Thin-Film Composite Nanofiltration Membrane by Using Graphene Oxide

Lin¹,

Zheng²,

Chen³

2021

Membranes

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Through interfacial polymerization (IP), a polyamide (PA) layer was synthesized on the top of a commercialized polysulfone substrate to form a thin-film composite (TFC) nanofiltration membrane. Graphene oxide (GO) was dosed during the IP process to modify the NF membrane, termed TFC-GO, to enhance oxidant resistance and membrane performance. TFC-GO exhibited increased surface hydrophilicity, water permeability, salt rejection, removal efficiency of pharmaceutical and personal care products (PPCPs), and H2O2 resistance compared with TFC. When H2O2 exposure was 0–96000 ppm-h, the surfaces of the TFC and TFC-GO membranes were damaged, and swelling was observed using scanning electron microscopy. However, the permeate flux of TFC-GO remained stable, with significantly higher NaCl, MgSO4, and PPCP rejection with increasing H2O2 exposure intensity than TFC, which exhibited a 3.5-fold flux increase with an approximate 50% decrease in salt and PPCP rejection. GO incorporated into a PA layer could react with oxidants to mitigate membrane surface damage and increase the negative charge on the membrane surface, resulting in the enhancement of the electrostatic repulsion of negatively charged PPCPs. This hypothesis was confirmed by the significant decrease in PPCP adsorption onto the surface of TFC-GO compared with TFC. Therefore, TFC-GO membranes exhibited superior water permeability, salt rejection, and PPCP rejection and satisfactory resistance to H2O2, indicating its great potential for practical applications.

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“…UV-Vis. absorption scans were evaluated in the range of 200-800 nm [44]. The comparative UV-Vis spectra of PTX, ultrasonically synthesized PTX-Cu NCP of required concentrations in ethanol were shown in Figure S1.…”

Section: Characterization Studiesmentioning

confidence: 99%

Paclitaxel-Copper Composite: A Metallodrug Model System Enroute Ultrasonic Force

A¹,

Shubham²,

K³

et al. 2021

Current Trends Anal Bioanal Chem

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Paclitaxel (PTX), an anti-microtubule agent, widely used as an efficacious anti-neoplastic drug in the treatment of numerous cancer diseases. The major disadvantage of PTX drug is practical insolubility in aqueous media and poor bioavailability, which directly impacts drug absorption in human beings. In this research, we successively tried to increase the bioavailability of PTX, by synthesizing PTX-Copper nanocomposite (Cu NCP) using water bath type ultrasonication method. PTX-Cu NCP exhibited significantly higher solubility in different aqueous media as compared to plain PTX. The drug release profile of PTX-Cu NCP was also comparatively positive with respect to plain PTX. PTX-Cu NCP was well characterized by SEM, XRD, UV-Vis spectroscopy and zeta potential. Physico-chemical properties and biological behavior of BSA-PTX-Cu NCP were evaluated by emission spectroscopy, where the binding constant was found to be 4.76 × 10 2 . Negative values of enthalpy [∆H° = -49.52 KJmol -1 ] and entropy [∆S° = -113.14 Jmol -1 K -1 ] indicate hydrophilic interaction between BSA and PTX-Cu NCP. Circular Dichroism binding studies of PTX-Cu NCP suggests no major change in secondary structure of BSA protein. PTX-Cu NCP displays favorable antioxidant activity with respect to ascorbic acid and comparatively prominent anticancer activity on MCF-7 and COLO-205 cell lines against standard anticancer drug ADR (Adriamycin) (Graphical abstract).

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Hydrophobic interpenetrating polyamide-PDMS membranes for desalination, pesticides removal and enhanced chlorine tolerance

Cited by 23 publications

References 36 publications

Critical Evaluation of Thin Film Composite Membrane on Pesticide Removal

Critical Evaluation of Thin Film Composite Membrane on Pesticide Removal

Enhancing H2O2 Tolerance and Separation Performance through the Modification of the Polyamide Layer of a Thin-Film Composite Nanofiltration Membrane by Using Graphene Oxide

Paclitaxel-Copper Composite: A Metallodrug Model System Enroute Ultrasonic Force

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