Preparation and dechlorination of a poly(vinylidene difluoride)-grafted acrylic acid film immobilized with Pd/Fe bimetallic nanoparticles for monochloroacetic acid

Xia, Zhi; Liu, Huiling; Wang, Shan; Meng, Zhongwei; Ren, Nanqi

doi:10.1016/j.cej.2012.06.056

Cited by 26 publications

(7 citation statements)

References 42 publications

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“…The possibility of their application in the cultivated field has been studied to alleviate agricultural problems, such as reducing irrigation water consumption and improving nutrient retention in medium . Acrylic acid (AA) is most frequently used in the superabsorbent material industrial production. , Moreover, poly(acrylic acid) (PAA), a biodegradable water-soluble polymer with various industrial applications, with significant pH response, is mainly due to high concentrations of −COOH groups. − However, most of the fertilizers with water-retention function were prepared by a cross-linked technique, which give a network coating on the fertilizer. The thickness of PAA coating, playing a key role for release behavior of nutrients, is roughly controlled by the ration of AA and fertilizer.…”

Section: Introductionmentioning

confidence: 99%

“…25 Acrylic acid (AA) is most frequently used in the superabsorbent material industrial production. 26,27 Moreover, poly(acrylic acid) (PAA), a biodegradable water-soluble polymer with various industrial applications, with significant pH response, is mainly due to high concentrations of −COOH groups. 28−30 However, most of the fertilizers with water-retention function were prepared by a cross-linked technique, which give a network coating on the fertilizer.…”

Section: ■ Introductionmentioning

confidence: 99%

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pH-Responsive Controlled-Release Fertilizer with Water Retention via Atom Transfer Radical Polymerization of Acrylic Acid on Mussel-Inspired Initiator

Jia

Zhang

et al. 2013

J. Agric. Food Chem.

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This work reports a polydopamine-graft-poly(acrylic acid) (Pdop-g-PAA)-coated controlled-release multi-element compound fertilizer with water-retention function by a combination of mussel-inspired chemistry and surface-initiated atom transfer radical polymerization (SI-ATRP) techniques for the first time. The morphology and composition of the products were characterized by transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), gel permeation chromatography (GPC), and inductively coupled plasma (ICP) emission spectrometry. The results revealed that the stimuli-responsive layer formed by a Pdop inner layer and a PAA outer corona exhibit outstanding selective permeability to charged nutrients and the release rate of encapsulated elements can be tailored by the pH values. At low pH, the Pdop-g-PAA layer can reduce nutrient loss, and at high pH, the coating restrains transportation of negative nutrients but favors the release of cations. Moreover, PAA brushes provide good water-retention property. This Pdop-graft-polymer brushes coating will be effective and promising in the research and development of multi-functional controlled-release fertilizer.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

pH-Responsive Controlled-Release Fertilizer with Water Retention via Atom Transfer Radical Polymerization of Acrylic Acid on Mussel-Inspired Initiator

Jia

Zhang

et al. 2013

J. Agric. Food Chem.

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“…The synthesis of poly(acrylic acid) (PAA)-polyvinylidene fluoride (PVDF) membranes along with novel ion-exchange processes for Pd/Fe particle incorporation have been reported for the treatment of chlorinated organic compounds [38,[47][48][49]. To scale up the synthesis of catalytic membranes, additional process optimizations and advanced material characterizations need to be performed.…”

Section: Introductionmentioning

confidence: 99%

Pd/Fe nanoparticle integrated PMAA-PVDF membranes for chloro-organic remediation from synthetic and site groundwater

Wan

Islam

Briot

et al. 2020

Journal of Membrane Science

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The poly(methacrylic acid) (PMAA) was synthesized in the pores of commercial microfiltration PVDF membranes to allow incorporation of catalytic palladium/iron (Pd/Fe) nanoparticles for groundwater remediation. Particles of 17.1 ± 4.9 nm size were observed throughout the pores of membranes using a focused ion beam. To understand the role of Pd fractions and particle compositions, 2-chlorobiphenyl was used as a model compound in solution phase studies. Results show H 2 production (Fe 0 corrosion in water) is a function of Pd coverage on the Fe. Insufficient H 2 production caused by higher coverage (> 10.4% for 5.5 wt%) hindered dechlorination rate. With 0.5 wt% Pd, palladized-Fe reaction rate (surface area normalized reaction rate, k sa = 0.12 L/(m 2-h) was considerably higher than isolated Pd and Fe particles. For groundwater, in a single pass of Pd/Fe-PMAA-PVDF membranes (0.5 wt% Pd), chlorinated organics, such as trichloroethylene (177 ppb) and carbon tetrachloride (35 ppb), were degraded to 16 and 0.3 ppb, respectively, at 2.2 seconds of residence time. The degradation rate (observed k sa) followed the order of carbon tetrachloride > trichloroethylene > tetrachloroethylene > chloroform. A 36 h continuous flow study with organic mixture and the regeneration process show the potential for on-site remediation.

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“…Xia et al [31] modified poly (vinylidene fluoride) (PVDF) film to increase its hydrophilicity. Monochloroacetic acid was dechlorinated by using Pd/Fe NPs fixed in modified PVDF film.…”

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confidence: 99%

Polyvinyl pyrrolidone-modified Pd/Fe nanoparticles for enhanced dechlorination of 2,4-dichlorophenal

Wang

Yang

2014

Desalination and Water Treatment

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A B S T R A C TDechlorination of chlorinated organic compounds with zero-valent iron or iron-based bimetallic nanoparticles (NPs) is an innovative technology for environmental remediation in soil and groundwater. However, dechlorination efficiency can be dramatically decreased due to aggregation of NPs. In this study, Pd/Fe NPs were modified by coating with polyvinyl pyrrolidone (K30) (PVP-K30) and PVP/ethanol as dispersants, respectively, resulting in not only the prevention of particle aggregation, but also the enhancement of overall dechlorination effectiveness. Transmission electron microscope, scanning electron microscope, specific surface area, and X-ray diffraction analyses indicate the dispersant-modified Pd/Fe NPs with a diameter of 50-100 nm were a-bcc crystal structure, highly dispersed with particle size distribution relatively uniform, and the majority of NPs are spherical particles. In comparison, the batch dechlorination tests demonstrated that the dispersant-modified Pd/Fe NPs exhibited higher dechlorination rate than pristine Pd/Fe NPs under same reaction condition. Additionally, some important parameters of catalytic dechlorination of 2,4-DCP with modified Pd/Fe NPs, such as pH value, temperature, and dosage of Pd/Fe NPs were also optimized.

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Preparation and dechlorination of a poly(vinylidene difluoride)-grafted acrylic acid film immobilized with Pd/Fe bimetallic nanoparticles for monochloroacetic acid

Cited by 26 publications

References 42 publications

pH-Responsive Controlled-Release Fertilizer with Water Retention via Atom Transfer Radical Polymerization of Acrylic Acid on Mussel-Inspired Initiator

pH-Responsive Controlled-Release Fertilizer with Water Retention via Atom Transfer Radical Polymerization of Acrylic Acid on Mussel-Inspired Initiator

Pd/Fe nanoparticle integrated PMAA-PVDF membranes for chloro-organic remediation from synthetic and site groundwater

Polyvinyl pyrrolidone-modified Pd/Fe nanoparticles for enhanced dechlorination of 2,4-dichlorophenal

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