A review: applications of iron nanomaterials in bioremediation and in detection of pesticide contamination

Bhalerao, Tejomyee S.

doi:10.1504/ijnp.2014.062034

Cited by 12 publications

(7 citation statements)

References 30 publications

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“…12−14 Nanostructured materials with unique physical and chemical properties are useful for the detection of pesticides, especially in surface and ground water. 15 These NPs are also promising tools for strategies for the elimination and degradation of pesticides in order to remedy environmental pollution in different areas. 16 Some papers in the literature describe the use of iron-based compounds for the degradation of pesticides, nevertheless the cytotoxic effects of these NPs have not been evaluated appropriately.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Photocatalytic Activity in Water Pollutants and Cytotoxic Response of α-Fe₂O₃ Nanoparticles

et al. 2019

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α-Fe2O3 samples were manufactured by means of the polymeric precursor method. The powders were sintered and calcined at temperatures of 300–700 °C for 2 h, respectively. In the X-ray diffraction results, the formation of the rhombohedral phase without secondary phases was exhibited. The size of the particle increased after calcination at 700 °C, exhibiting a slightly more irregular morphology for the samples calcined with the addition of NH4OH in the synthesis process. From the field-emission scanning electron microscopy measurements, the particle size was determined, showing a smaller size for the samples without NH4OH in the synthesis process. The samples calcined at 600 °C had a size of 100 nm, with the sizes for lower temperatures being smaller. The size of the nanoparticle agglomerates was largest for the samples with NH4OH; however, the zeta potential was slightly lower over time for these samples. The phase study of the α-Fe2O3 nanoparticles was confirmed by means of Raman spectroscopy, without additional bands of another crystal structure. In addition, the synthesized nanoparticles exhibited good photocatalytic activity in the degradation of rhodamine B (RhB) and atrazine (ATZ) within 40 min, with a maximum degradation of 59% for ATZ and 40% for rhodamine. The best responses in the degradation were for the samples without the addition of NH4OH in the synthesis process and in proportions lower than 0.1 g. The cytotoxic effects of the nanoparticles obtained at 600 °C were evaluated in apical cells of onion roots. The results are promising for future applications because no changes were observed in the mitosis of the cells.

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Section: Introductionmentioning

confidence: 99%

Evaluation of Photocatalytic Activity in Water Pollutants and Cytotoxic Response of α-Fe₂O₃ Nanoparticles

et al. 2019

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“…In the reduction of toxicity of some materials, such is the case of Cr +6 , which is converted to Cr +3 in wastewater by NA-FE-NPs synthesized by using extract of Nephrolepis auriculata (Yi et al, 2019). Current applications of iron-based technologies involved remediation process and, are divided into two groups: technologies which use iron as a sorbent, (co-)precipitant or contaminant immobilising agent; and the use of iron as an electron donor to break down or to convert contaminants into a less toxic or mobile form (Bhalerao 2014). As Fentolike catalyst for the decolorization of sodium borohydride (Schröfel et al, 2014), as antibacterial agent of Zero-valent iron nanoparticles (nano-Fe 0 ) against Escherichia coli (Lee et al, 2008), and as antifungal agent against filamentous fungi Alternaria mali, Botryosphaeria dothidea, and Diplodia seriata (Ahmad et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Biosynthesis of iron nanoparticles (FeNPs) by Alternaria alternata MVSS-AH-5

et al. 2019

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The ability of four extracellular filtrates (FE), obtained from A. alternata biomass grown in four different culture media; malt dextrose broth (MDB), potato dextrose broth (PDB), sucrose (S) and Czapek (C), were evaluated to biosynthesize iron nanoparticles (FeNPs), at the end of the assay a brown color was revealed in all the samples. To evidence biosynthesis of nanoparticles, absorption spectra were made from 200 to 600 nm for all the samples and, analyzed by transmission electronic microscopy (TEM). The morphology and size of the synthesized FeNPs were studied using the SPIP 6.2.0 software. From the four extracellular filtrates assays, the nanoparticles biosynthesis was possible only in the EF-PDB and EF-C, showing their presence in the UV-vis spectrum when forming an absorption band at 226 and 225 respectively, and plateau around at 270 nm to EF-PDB, and 290 nm to EF-C. The synthesized nanoparticles presented spherical and polydisperse form, those synthesized with EF-PDB showed a size of 20-40 nm, while those synthesized with EF-C had a size of 10-80 nm. Six months after their production, the FeNPs biosynthesized by EF-C were analyzed by microscopy showing an

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“…In addition to its pertinent role in targeting and destroying malignant cells, IONP’s can be engineered for in vivo applications such as cellular therapy [ 7 ], bioseparation [ 8 ] and immunoassay [ 9 ]. Multifunctional IONP’s have also been used as nanoadsorbents in water treatment and purification and as sensitive biosensors [ 10 ] that track down formidable pollutants in aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

Facile aerobic construction of iron based ferromagnetic nanostructures by a novel microbial nanofactory isolated from tropical freshwater wetlands

2017

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BackgroundIron based ferromagnetic nanoparticles (IONP) have found a wide range of application in microelectronics, chemotherapeutic cell targeting, and as contrast enhancers in MRI. As such, the design of well-defined monodisperse IONPs is crucial to ensure effectiveness in these applications. Although these nanostructures are currently manufactured using chemical and physical processes, these methods are not environmentally conducive and weigh heavily on energy and outlays. Certain microorganisms have the innate ability to reduce metallic ions in aqueous solution and generate nano-sized IONP’s with narrow size distribution. Harnessing this potential is a way forward in constructing microbial nanofactories, capable of churning out high yields of well-defined IONP’s with physico-chemical characteristics on par with the synthetically produced ones.ResultsIn this work, we report the molecular characterization of an actinomycetes, isolated from tropical freshwater wetlands sediments, that demonstrated rapid aerobic extracellular reduction of ferric ions to generate iron based nanoparticles. Characterization of these nanoparticles was carried out using Field Emission Scanning Electron Microscope with energy dispersive X-ray spectroscopy (FESEM–EDX), Field Emission Transmission Electron Microscope (FETEM), Ultraviolet–Visible (UV–Vis) Spectrophotometer, dynamic light scattering (DLS) and Fourier transform infrared spectroscopy (FTIR). This process was carried out at room temperature and humidity and under aerobic conditions and could be developed as an environmental friendly, cost effective bioprocess for the production of IONP’s.ConclusionWhile it is undeniable that iron reducing microorganisms confer a largely untapped resource as potent nanofactories, these bioprocesses are largely anaerobic and hampered by the low reaction rates, highly stringent microbial cultural conditions and polydispersed nanostructures. In this work, the novel isolate demonstrated rapid, aerobic reduction of ferric ions in its extracellular matrix, resulting in IONPs of relatively narrow size distribution which are easily extracted and purified without the need for convoluted procedures. It is therefore hoped that this isolate could be potentially developed as an effective nanofactory in the future.

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A review: applications of iron nanomaterials in bioremediation and in detection of pesticide contamination

Cited by 12 publications

References 30 publications

Evaluation of Photocatalytic Activity in Water Pollutants and Cytotoxic Response of α-Fe₂O₃ Nanoparticles

Evaluation of Photocatalytic Activity in Water Pollutants and Cytotoxic Response of α-Fe₂O₃ Nanoparticles

Biosynthesis of iron nanoparticles (FeNPs) by Alternaria alternata MVSS-AH-5

Facile aerobic construction of iron based ferromagnetic nanostructures by a novel microbial nanofactory isolated from tropical freshwater wetlands

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A review: applications of iron nanomaterials in bioremediation and in detection of pesticide contamination

Cited by 12 publications

References 30 publications

Evaluation of Photocatalytic Activity in Water Pollutants and Cytotoxic Response of α-Fe2O3 Nanoparticles

Evaluation of Photocatalytic Activity in Water Pollutants and Cytotoxic Response of α-Fe2O3 Nanoparticles

Biosynthesis of iron nanoparticles (FeNPs) by Alternaria alternata MVSS-AH-5

Facile aerobic construction of iron based ferromagnetic nanostructures by a novel microbial nanofactory isolated from tropical freshwater wetlands

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Evaluation of Photocatalytic Activity in Water Pollutants and Cytotoxic Response of α-Fe₂O₃ Nanoparticles

Evaluation of Photocatalytic Activity in Water Pollutants and Cytotoxic Response of α-Fe₂O₃ Nanoparticles