Impacts of Magnetic Iron Oxide Nanoparticles in Terrestrial and Aquatic Environments

Grillo, Renato; Fraceto, Leonardo Fernandes

doi:10.1002/9781119316329.ch7

Cited by 4 publications

(2 citation statements)

References 79 publications

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“…Additionally, the magnetization curves as a function of the applied magnetic field have not shown any hysteresis, i.e., zero coercivity, corroborating that the samples are in a superparamagnetic state at room temperature (Figure S3). This magnetic behavior is essential for environmental applications since the particles will only be magnetized in the presence of an external magnetic field …”

Section: Resultsmentioning

confidence: 99%

“…This magnetic behavior is essential for environmental applications since the particles will only be magnetized in the presence of an external magnetic field. 39 Fourier-transform infrared (FTIR) spectra demonstrated that the characteristic peaks of the UA fingerprint region (ca. 1750−876 cm −1 ) could be observed for SPIONs:UA and SPIONs@OA:UA (Figures 2a,b).…”

Section: Resultsmentioning

confidence: 99%

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Assessing the Fate of Superparamagnetic Iron Oxide Nanoparticles Carrying Usnic Acid as Chemical Cargo on the Soil Microbial Community

et al. 2023

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In the present study we evaluate the effect of superparamagnetic iron oxide nanoparticles (SPIONs) carrying usnic acid (UA) as chemical cargo on the soil microbial community in a dystrophic red latosol (oxysol). Herein, 500 ppm UA or SPIONs-framework carrying UA were diluted in sterile ultrapure deionized water and applied by hand sprayer on the top of the soil. The experiment was conducted in a growth chamber at 25 °C, with a relative humidity of 80% and a 16 h/8 h light–dark cycle (600 lx light intensity) for 30 days. Sterile ultrapure deionized water was used as the negative control; uncapped and oleic acid (OA) capped SPIONs were also tested to assess their potential effects. Magnetic nanostructures were synthesized by a coprecipitation method and characterized by scanning and transmission electron microscopy (SEM and TEM), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), zeta potential, hydrodynamic diameter, magnetic measurements, and release kinetics of chemical cargo. Uncapped and OA-capped SPIONs did not significantly affect soil microbial community. Our results showed an impairment in the soil microbial community exposed to free UA, leading to a general decrease in negative effects on soil-based parameters when bioactive was loaded into the nanoscale magnetic carrier. Besides, compared to control, the free UA caused a significant decrease in microbial biomass C (39%), on the activity of acid protease (59%), and acid phosphatase (23%) enzymes, respectively. Free UA also reduced eukaryotic 18S rRNA gene abundance, suggesting a major impact on fungi. Our findings indicate that SPIONs as bioherbicide nanocarriers can reduce the negative impacts on soil. Therefore, nanoenabled biocides may improve agricultural productivity, which is important for food security due to the need of increasing food production.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Assessing the Fate of Superparamagnetic Iron Oxide Nanoparticles Carrying Usnic Acid as Chemical Cargo on the Soil Microbial Community

et al. 2023

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Iron oxide nanoparticles as iron micronutrient fertilizer—Opportunities and limitations

Shirsat,

2023

J. Plant Nutr. Soil Sci.

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Iron (Fe) is necessary for plant growth and development. Iron deficiency disrupts major metabolic and cellular activities such as respiration, DNA synthesis, and chlorophyll synthesis. Iron also activates various metabolic pathways and is vital to numerous enzymes. Iron is widely distributed in soil, but plants do not readily absorb it. In addition to neutral pH, Fe also forms insoluble Fe complexes under alkaline conditions. The fundamental cause of Fe chlorosis is an imbalance between the solubility of Fe in soil and the demand for Fe by plants. Various Fe fertilizers, including organic, chelated, and inorganic, are administered to the soil and leaves to treat Fe deficiency and chlorosis. Currently, used Fe fertilizers are expensive, easily adsorb on soil particles, and cause Fe to leach out of the soil with water, thereby diminishing their efficiency. They also need to be applied repeatedly, resulting in an excessive Fe fertilizer concentration in the soil that can cause harm to the plants. The usage of Fe nanofertilizers in agricultural production has expanded to address the disadvantages of existing Fe fertilizers. The advantages of nanosized Fe fertilizers include their physical and chemical characteristics, such as the high surface area to volume ratio that aids in easy absorption by plants’ roots and leaves. Controlled‐release iron oxide nanofertilizers supply the regulated release of nutrients in a way that is coordinated with the nutritional needs of the crops. This improves the accumulation of nutrients in the plant, filling in the gap of nutrient deficiency and lowering environmental risks due to leaching. The possibility of iron oxide nanoparticles as Fe micronutrient fertilizers, their uptake and mechanism of action, advantages, and limitations are critically highlighted in this review article.

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Toxic Effects of Nanomaterials on Aquatic Animals and Their Future Prospective

Zafar,

Safder,

Ain

et al. 2023

Xenobiotics in Aquatic Animals

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Impacts of Magnetic Iron Oxide Nanoparticles in Terrestrial and Aquatic Environments

Cited by 4 publications

References 79 publications

Assessing the Fate of Superparamagnetic Iron Oxide Nanoparticles Carrying Usnic Acid as Chemical Cargo on the Soil Microbial Community

Assessing the Fate of Superparamagnetic Iron Oxide Nanoparticles Carrying Usnic Acid as Chemical Cargo on the Soil Microbial Community

Iron oxide nanoparticles as iron micronutrient fertilizer—Opportunities and limitations

Toxic Effects of Nanomaterials on Aquatic Animals and Their Future Prospective

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