Microencapsulated Zero Valent Iron NanoParticles in Polylactic acid matrix for in situ remediation of contaminated water

Pandey, Kalpana; Saha, Sampa

doi:10.1016/j.jece.2020.103909

Cited by 19 publications

(15 citation statements)

References 45 publications

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“…Most importantly, magnetic nanoparticles such as iron (0), Fe 3 O 4 , and so forth can be directly incorporated into the polymer solution while performing electrojetting, which has already been demonstrated by us and others. , Because of their interesting attributes, iron (0) nanoparticles were chosen to be added into the polymeric solution while jetting to yield magnetic particle-loaded polymeric particles aiming to facilitate magnetic force-induced aggregation and separation of particles after enzyme immobilization. First, iron (0) magnetic nanoparticles were synthesized by following a published procedure . Then, a polymeric solution composed of PLA and poly(MMA- co -BEMA) (75:25) at a concentration of 3 wt % in chloroform: DMF (95:5) was prepared, and around 30 wt % (30 wt % of the polymer) iron (0) nanoparticles (freshly synthesized) were incorporated and well-dispersed in the solution.…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, they are widely used as carrier materials for enzymes, drugs, and so on owing to their biocompatibility . Most importantly, magnetic nanoparticles such as iron (0), Fe 3 O 4 , and so forth can be directly incorporated into the polymer solution while performing electrojetting, which has already been demonstrated by us and others. , Because of their interesting attributes, iron (0) nanoparticles were chosen to be added into the polymeric solution while jetting to yield magnetic particle-loaded polymeric particles aiming to facilitate magnetic force-induced aggregation and separation of particles after enzyme immobilization. First, iron (0) magnetic nanoparticles were synthesized by following a published procedure .…”

Section: Resultsmentioning

confidence: 99%

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High Adsorption of α-Glucosidase on Polymer Brush-Modified Anisotropic Particles Acquired by Electrospraying—A Combined Experimental and Simulation Study

Singh

Saha

2021

ACS Appl. Bio Mater.

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In this particular contribution, we aim to immobilize a model enzyme such as α-glucosidase onto poly(DMAEMA) [poly(2-dimethyl amino ethyl methacrylate)] brush-modified anisotropic (cup-and disc-shaped) biocompatible polymeric particles. The anisotropic particles comprising a blend of PLA [poly(lactide)] and poly(MMA-co-BEMA) [poly((methyl methacrylate)-co-(2-(2-bromopropionyloxy) ethyl methacrylate)] were acquired by electrospraying, a scalable and convenient technique. We have also demonstrated the role of a swollen polymer brush grafted on the surface of cup-/disc-shaped particles via surfaceinitiated atom transfer radical polymerization in immobilizing an unprecedentedly high loading of enzyme [441 mg/g (cup)−589 mg/g (disc) of particles, 15−20 times higher than that of the literature-reported system] as compared to non-brush-modified particles. Circular dichroism spectroscopy was used to predict the structural changes of the enzyme upon immobilization onto the carrier particles. An enormously high amount of enzymes with preserved activity (∼85 ± 13% for cups and ∼78 ± 15% for discs) was found to adhere onto brush-modified particles at pH 7 via electrostatic adsorption. These findings were further explored at the atomistic level using a coarse-grained dissipative particle dynamics simulation approach, which exhibited excellent correlation with experimental results. In addition, accelerated particle separation was also achieved via magnetic force-induced aggregation within 20 min (without a centrifuge) by incorporating magnetic nanoparticles into disc-shaped particles while electrojetting. This further strengthens the technical feasibility of the process, which holds immense potential to be applied for various enzymes intended for several applications.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

High Adsorption of α-Glucosidase on Polymer Brush-Modified Anisotropic Particles Acquired by Electrospraying—A Combined Experimental and Simulation Study

Singh

Saha

2021

ACS Appl. Bio Mater.

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“…The interaction of these nanoparticles with biomolecules depends on the nature of saccharide moiety. Decorating these metal particles with hydrophilic groups tends to increase their stability and surface area and prevents surface oxidation, 72 thus decreasing the magnetic coupling effect that exists due to reciprocal magnetic attraction. 73 Different techniques to fabricate carbohydrate-coated magnetic nanoparticles have been summarized in Table 3.…”

Section: Acs Applied Bio Materialsmentioning

confidence: 99%

Engineering Carbohydrate-Based Particles for Biomedical Applications: Strategies to Construct and Modify

Thodikayil

Sharma

Saha

2021

ACS Appl. Bio Mater.

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Carbohydrate-based micro/nanoparticles have gained significant attention for various biomedical applications such as targeted/triggered/controlled drug delivery, bioimaging, biosensing, etc., because of their prominent characteristics like biocompatibility, biodegradability, hydrophilicity, and nontoxicity as well as nonimmunogenicity. Most importantly, the ability of the nanoparticles to recognize specific cell sites by targeting cell surface receptors makes them a promising candidate for designing a targeted drug delivery system. These particles may either comprise polysaccharides/glycopolymers or be integrated with various polymeric/inorganic nanoparticles such as gold, silver, silica, iron, etc., to reduce the toxicity of the inorganic nanoparticles and thus facilitate their cellular insertion. Various synthetic methods have been developed to fabricate carbohydrate-based or carbohydrate-conjugated inorganic/polymeric nanoparticles. In this review, we have highlighted the recently developed synthetic approaches to afford carbohydrate-based particles along with their significance in various biomedical applications.

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“…Several strategies have been reported to synthesize recyclable nZVI-based catalytic materials. The polylactic acid was used encapsulated nZVI on methyl orange decolorization and recyclable up to 4 cycles for 60 h (Pandey & Saha 2020). nZVI nanoclusters were fabricated under the cetyltrimethylammonium bromide (CTAB) surfactant as a template and the 8 successive cycles were observed on p-nitrophenol degradation (Shi et al 2019).…”

Section: Recyclability Of Catalytic Cylindermentioning

confidence: 99%

Application of recyclable nano zero-valent iron encapsulated L-cysteine catalytic cylinder product for degradation of BTEX in groundwater by persulfate oxidation

et al. 2021

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Benzene, toluene, ethylbenzene and xylene (BTEX) possess a negative impact on the environment and human being due to their highly toxic and carcinogenic properties. In this study, persulfate (PS) activated by nano zero-valent iron (nZVI) coupled with chelated L-cysteine (L-cys) process was investigated for BTEX degradation in contaminated groundwater. BTEX degradation had a significant acceleration and improvement with the removal from 62.7 to 100% along with the increasing dosage of L-cys from 0.12 to 0.27 M in 24 h. Further, the compact nZVI catalytic cylinder and nZVI encapsulated L-cys catalytic cylinder were successfully manufactured by encapsulating nZVI, and nZVI and L-cys together with additives of cement, river sand, stearic acid (SA) and zeolite. The SEM image, XRD patterns and FTIR spectra showed that the manufactured catalytic cylinder had a porous structure and encapsulated nZVI and L-cys successfully. Six successive cycles of BTEX degradation were completed and the degradation rate decreased gradually in each cycle. The catalytic activity of nZVI encapsulated L-cys catalytic cylinder was superior to nZVI catalytic cylinder in each cycle. The electron paramagnetic resonance (EPR) results indicated that HO• was the dominant active species in the BTEX degradation process. Benzoic acid (BA) scavenge experiments showed that L-cys could increase the yield of HO• in the PS/nZVI system. The HO• yields of PS/nZVI encapsulated L-cys catalytic cylinder system were 3.2 to 4.8 folds higher than those of PS/nZVI catalytic cylinder system. The possible mechanisms of PS activation by nZVI encapsulated L-cys catalytic cylinder were supposed. Homogeneous Fenton reaction and heterogeneous catalysis on the nZVI surface are two co-existence mechanisms in the PS/nZVI encapsulated L-cys catalytic cylinder system. The findings of this study provide new insights into the mechanism of nZVI encapsulated L-cys catalytic cylinder activating PS, showing its potential applications for the remediation of groundwater.

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Microencapsulated Zero Valent Iron NanoParticles in Polylactic acid matrix for in situ remediation of contaminated water

Cited by 19 publications

References 45 publications

High Adsorption of α-Glucosidase on Polymer Brush-Modified Anisotropic Particles Acquired by Electrospraying—A Combined Experimental and Simulation Study

High Adsorption of α-Glucosidase on Polymer Brush-Modified Anisotropic Particles Acquired by Electrospraying—A Combined Experimental and Simulation Study

Engineering Carbohydrate-Based Particles for Biomedical Applications: Strategies to Construct and Modify

Application of recyclable nano zero-valent iron encapsulated L-cysteine catalytic cylinder product for degradation of BTEX in groundwater by persulfate oxidation

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