Green Synthesis of Silver Nanoparticles Using Microalgal Extract and Its Application in Metal Ion Removal From Aqueous Solution

Negi, Surindra; Singh, V. B.; Rawat, Jyoti

doi:10.18006/2021.9(2).214.230

Cited by 6 publications

(3 citation statements)

References 37 publications

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“…One of the advantages of green synthesis is the presence of other phytochemical elements from the EDX spectrum that may possibly arise from the P. indica leaf extract serving as the capping agent. This is due to the high concentration of capping agents in the reaction medium, the copper grid, or other additives used during the analysis ( Negi et al, 2021 ). The presence of C, O, Cl, and K suggests that the surface of Se–Au BNPs was covered with biomolecules.…”

Section: Resultsmentioning

confidence: 99%

Green biosynthesis of bimetallic selenium–gold nanoparticles using Pluchea indica leaves and their biological applications

Aly Khalil,

Saied,

Mekky

et al. 2024

Front. Bioeng. Biotechnol.

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Increasing bacterial resistance and the negative impact of currently used antibacterial agents have produced the need for novel antibacterial agents and anticancer drugs. In this regard, nanotechnology could provide safer and more efficient therapeutic agents. The main methods for nanoparticle production are chemical and physical approaches that are often costly and environmentally unsafe. In the current study, Pluchea indica leaf extract was used for the biosynthesis of bimetallic selenium–gold nanoparticles (Se-Au BNPs) for the first time. Phytochemical examinations revealed that P. indica leaf extract includes 90.25 mg/g dry weight (DW) phenolics, 275.53 mg/g DW flavonoids, and 26.45 mg/g DW tannins. X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier-transform infrared (FTIR) spectroscopy, dynamic light scattering (DLS), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDX) techniques were employed to characterize Se-Au BNPs. Based on UV-vis spectra, the absorbance of Se-Au BNPs peaked at 238 and 374 nm. In SEM imaging, Se-Au BNPs emerged as bright particles, and both Au and Se were uniformly distributed throughout the P. indica leaf extract. XRD analysis revealed that the average size of Se-Au BNPs was 45.97 nm. The Se-Au BNPs showed antibacterial properties against Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, and Bacillus subtilis, with minimum inhibitory concentrations (MICs) of 31.25, 15.62, 31.25, and 3.9 μg/mL, respectively. Surprisingly, a cytotoxicity assay revealed that the IC50 value toward the Wi 38 normal cell line was 116.8 μg/mL, implying that all of the MICs described above could be used safely. More importantly, Se-Au BNPs have shown higher anticancer efficacy against human breast cancer cells (MCF7), with an IC50 value of 13.77 μg/mL. In conclusion, this paper is the first to provide data on the effective utilization of P. indica leaf extract in the biosynthesis of biologically active Se-Au BNPs.

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Section: Resultsmentioning

confidence: 99%

Green biosynthesis of bimetallic selenium–gold nanoparticles using Pluchea indica leaves and their biological applications

Aly Khalil,

Saied,

Mekky

et al. 2024

Front. Bioeng. Biotechnol.

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“…Lead and cadmium were taken out of contaminated water using AgNPs. The study found that the removal efficiency of AgNPs for cadmium and lead was 95% and 90%, respectively, at a concentration of 0.2 g/L (Negi et al, 2021).…”

Section: Role Of Nanotechnology To Improve Bioremediation By Microbesmentioning

confidence: 96%

Enhancing efficacy of microbial bioremediation by intervention of nanotechnology and metabolic engineering: A review

Mehta,

Prasad,

Upadhye

et al. 2024

JANS

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Ever since the start of the Industrial Revolution, environmental pollution has significantly increased. The prominent cause of most diseases in humans, animals, and plants is the presence of toxic materials, pollutants, contaminants, and hazardous compounds released by industries. One of the major factors is the presence of heavy metals in the air, water bodies and soil. Heavy metals have biomagnification and bioaccumulation characteristics, making them hazardous for flora and fauna on a large scale. Recently, biological sources such as bacteria, fungi, algae, etc., have been used to bioabsorb these heavy metals. The microbial properties of these cell walls are utilized for effective and low-cost absorption of metals. Bioaugmentation, biosorption and biostimulation are effective strategies for reducing the toxicity of hazardous contaminants in the soil and facilitating bioremediation. The mechanism of biosorption is mainly based on ions and functional groups present in the microbes. Fungal species are advantageous over bacteria as they are easier to handle, cost-effective and, most importantly, non-pathogenic, making them ideal candidates for biosorption. This review provides a comprehensive overview of various microbial strains utilized in bioremediation. Further, the review highlights the application of nanotechnology and metabolic engineering approaches to improve the efficacy of Biosorption, Biostimulation and Bioaugmentation. It provides insights on the role of microbial nanoparticles in bioremediation and prospects in the forte of microbe-assisted bioremediation.

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“…This was determined by comparing the values of the rate constants. Finally, the findings suggest that silver nanoparticles might be applied as adsorbents in wastewater treatment to eliminate heavy metal ions in an effective manner [ 103 ].…”

Section: Nanomaterials Used For Heavy Metal Removalmentioning

confidence: 99%

Recent Advances in Adsorptive Nanocomposite Membranes for Heavy Metals Ion Removal from Contaminated Water: A Comprehensive Review

Damiri

Andra²,

Kommineni

et al. 2022

Materials

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Water contamination is one of the most urgent concerns confronting the world today. Heavy metal poisoning of aquatic systems has piqued the interest of various researchers due to the high toxicity and carcinogenic consequences it has on living organisms. Due to their exceptional attributes such as strong reactivity, huge surface area, and outstanding mechanical properties, nanomaterials are being produced and employed in water treatment. In this review, recent advances in the use of nanomaterials in nanoadsorptive membrane systems for wastewater treatment and heavy metal removal are extensively discussed. These materials include carbon-based nanostructures, metal nanoparticles, metal oxide nanoparticles, nanocomposites, and layered double hydroxide-based compounds. Furthermore, the relevant properties of the nanostructures and the implications on their performance for water treatment and contamination removal are highlighted. The hydrophilicity, pore size, skin thickness, porosity, and surface roughness of these nanostructures can help the water permeability of the nanoadsorptive membrane. Other properties such as surface charge modification and mechanical strength can improve the metal adsorption effectiveness of nanoadsorptive membranes during wastewater treatment. Various nanocomposite membrane fabrication techniques are also reviewed. This study is important because it gives important information on the roles of nanomaterials and nanostructures in heavy metal removal and wastewater treatment.

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Green Synthesis of Silver Nanoparticles Using Microalgal Extract and Its Application in Metal Ion Removal From Aqueous Solution

Cited by 6 publications

References 37 publications

Green biosynthesis of bimetallic selenium–gold nanoparticles using Pluchea indica leaves and their biological applications

Green biosynthesis of bimetallic selenium–gold nanoparticles using Pluchea indica leaves and their biological applications

Enhancing efficacy of microbial bioremediation by intervention of nanotechnology and metabolic engineering: A review

Recent Advances in Adsorptive Nanocomposite Membranes for Heavy Metals Ion Removal from Contaminated Water: A Comprehensive Review

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