Disinfection of water and wastewater by biosynthesized magnetite and zerovalent iron nanoparticles via NAP-NAR enzymes of Proteus mirabilis 10B

Zaki, Sahar; Eltarahony, Marwa; Abd‐El‐Haleem, Desouky

doi:10.1007/s11356-019-05479-2

Cited by 34 publications

(36 citation statements)

References 63 publications

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“…In general, the remediated elements were suggested to be encompassed among calcareous deposits indicated by the presence of characteristic peaks of C, O and, Ca. As previously noticed, the existence of P and N signals at 2.01 and 0.39 keV, respectively could possibly be assigned to emissions from proteins and other biomolecules (Zaki et al, 2019).…”

Section: Edxsupporting

confidence: 60%

“…In addition, P and S peaks were observed at emission peaks 2.013 and 2.3 keV, correspondingly, implying the biological origin of CaCO3 crystals. Where, both elements are the building blocks of vital biomolecules such as proteins, nucleic acids phospholipids and, polysaccharides (Zaki et al, 2019). As referred by Ghosh et al, 2019, such elements could donate stabilization for biosynthesized precipitates.…”

Section: Crystals Identification and Characterizationmentioning

confidence: 99%

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Heavy Metals Bioremediation and Water Softening Using Ureolytic Metschnikowia Pulcherrima and Raoultella Planticola Strains

Eltarahony¹,

Kamal²,

Zaki³

et al. 2021

Preprint

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This study employed the ureolytic fungal Metschnikowia pulcherrima (29A) and bacterial Raoultella planticola (VIP) strains in Pb 2+ and Hg 2+ removal using the promising CaCO 3 bio precipitation technique. Out of fifty isolates, strains 29A and VIP were selected based on their highest ureolytic activity followed by MIC assay using 350 ppm of Pb 2+ and Hg 2+ . The maximum urease activity recorded 884 and 639 U/mL for 29A and VIP strains at 24 and 30h of incubation, respectively. Complete removal of Pb 2+ was achieved at 42h and 90h for 29A, VIP correspondingly, while Hg 2+ was totally removed at 60h and 102h for 29A, VIP respectively. Remarkable removal of Ca 2+ (>95%) was achieved by the end of the experiments, which would address the hardness problem in the water treatment process. Further, EDX, SEM and, XRD were used to characterize the remediated precipitates. EDX profiles showed characteristic peaks of C, O and, Ca 2+ besides Pb 2+ and Hg 2+ . SEM illustrated the presence of microbial imprints and calcinated cells in the remediated bioliths. However, XRD confirmed the transformation of soluble metals to insoluble forms entrapped in calcite or vaterite lattice. Such a bioremediation approach ensures the detoxification and sequestration of heavy metals in a stable and durable matrix; obstructing their leach from carbonate complex trap to the environment.

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Section: Edxsupporting

confidence: 60%

Section: Crystals Identification and Characterizationmentioning

confidence: 99%

Heavy Metals Bioremediation and Water Softening Using Ureolytic Metschnikowia Pulcherrima and Raoultella Planticola Strains

Eltarahony¹,

Kamal²,

Zaki³

et al. 2021

Preprint

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“…Effect of temperature and pH on the synthesis of AgNPs was investigated by varying the the temperature (15-40 °C) and pH (3)(4)(5)(6)(7)(8)(9). To obtained the desired pH value of fungal extract NaOH and HCl was used prior to the addition of silver nitrate.…”

Section: Optimization Of Physio-chemical Parameters For Agnps Synthesismentioning

confidence: 99%

“…Synthesis of nanoparticles has gained attention due to their applications in multiple fields such as antifungal agents, antibacterial agents, biosensor, bioremediation, anticancer, drug delivery, etc. [3][4][5][6][7][8][9][10]. In addition to this, unique properties of nanoparticles such as size, shape, surface to volume ratio, high catalytic activity, etc.…”

Section: Introductionmentioning

confidence: 99%

Extracellular synthesis of silver nanoparticles using entomopathogenic fungus: characterization and antibacterial potential

Tyagi¹,

Tyagi²,

Gola³

et al. 2019

SN Appl. Sci.

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Present study involves the simple, rapid, non-toxic and in vitro method of extracellular silver nanoparticles synthesis using Entomopathogenic fungus (Beauveria bassiana). The development of silver nanoparticle in fungal supernatant was confirmed by the absorbance peak at 450 nm in UV-Vis spectrophotometer. Further, presence of AgNPs and its crystal lattice was confirmed by EDS and XRD, respectively. TEM micrograph confirmed the presence of differently shaped (triangular, circular, hexagonal) nanoparticles with size ranging from 10 to 50 nm. Variable shape and size of fungal assisted AgNps was also confirmed in SEM study. The optimal pH and temperature for biosynthesis of nanoparticles was found to be 6.0 and 25 °C, respectively. The continuous effects of AgNPs against Escherichia coli, Pseudomonas aeruginosa and Staphylococcus aureus in time dependent manner was confirmed in growth kinetic studies. During 36 h of growth study, maximum reduction in O.D 560 was found in E. coli (67.2%) followed by P. aeruginosa (63.3%) and S. aureus (56.8%) at 30 °C. The MIC values of fungal assisted AgNPs against E. coli, P. aeruginosa and S. aureus was found to be 2.5, 3 and 4.5 ppm, respectively. The MIC values of Ciprofloxacin was observed to be 0.5, 0.5 and 0.7 ppm, whereas MICs of AgNPs + Ciprofloxacin showed 0.4, 0.4, 0.5 ppm against E. coli, P. aeruginosa and S. aureus, respectively, clearly highlighting the synergistic effect of AgNPs in combination with Ciprofloxacin. In the view of challenges for developing antimicrobial nanoparticles of variable shape and size by various other methods, tuning nanoparticles synthesis via fungi can be a wonderful approach to resolve existing hurdles.

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“…Miniaturization is an adopted phenomenon from nature since the evolution process until now, which considers being the fundamental principle of nanoscience and subsequent nanotechnological applications. Such naturally motivated technology addresses the art of designing materials in nanostructure configuration (less than 100 nm, at least in one dimension) that exhibit unique features surpassing their bulk-counterparts 1 , 2 . Over the recent decade, the paradigm leapfrogging in nanotechnology has led to an improvement in the methods of synthesizing nanomaterials that included the employment of green chemistry approaches 3 , 4 .…”

Section: Introductionmentioning

confidence: 99%

Unveiling the role of novel biogenic functionalized CuFe hybrid nanocomposites in boosting anticancer, antimicrobial and biosorption activities

Eltarahony

Abu‐Serie

Hamad

et al. 2021

Sci Rep

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The quest for eco-friendly and biocompatible nanoparticles (NPs) is an urgent issue in the agenda of the scientific community and applied technology, which compressing synthesis routes. For the first time, a simple route for the biosynthesis of functionalized CuFe-hybrid nanocomposites (FCFNCs) was achieved using Streptomyces cyaneofuscatus through a simultaneous bioreduction strategy of Cu and Fe salts. The suitability of FCFNCs was evaluated medically and environmentally as an anticancer agent, antimicrobial agent and dye bio-sorbent. The physicochemical characteristics of FCFNCs using XRD, EDX, elemental mapping, FTIR, UV–Vis., TEM and ζ-potential confirmed the formation of spheres agglomerated into chains (37 ± 2.2 nm), self-functionalized nanocomposite by proteinaceous moieties with considerable stability (− 26.2 mV). As an anticancer agent, FCFNCs displayed the highest apoptotic impact (> 77.7%) on Caco-2, HepG-2, MCF-7 and PC-3 cancer cells at IC50 ≤ 17.21 μg/mL with the maximum up regulation of p53 and caspase 3 expression and the lowest Ki-67 level, relative to both functionalized CuNPs (FCNPs) and FeNPs (FFNPs). Meanwhile, it maintained the viability of normal human cells by EC100 up to 1999.7 μg/mL. Regarding the antimicrobial activity, FCFNCs offered > 70% growth reduction among wide spectrum prokaryotic and eukaryotic pathogens. Additionally, the synergistic feature of FCFNCs disintegrated the pre-established biofilm and algal growth in a dose-dependent manner. However, as a bio-sorbent, FCFNCs decolorized > 68% of malachite green and congo red dyes (200 mg/L), reflecting considerable remediation efficiency, confirmed by FTIR of FCFNCs- adsorbed dyes and microtoxicity/cytotoxicity of solutions after remediation. This study offers new insights into promising CuFe-hybrid nanocomposites for recruitment in several applications.

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Disinfection of water and wastewater by biosynthesized magnetite and zerovalent iron nanoparticles via NAP-NAR enzymes of Proteus mirabilis 10B

Cited by 34 publications

References 63 publications

Heavy Metals Bioremediation and Water Softening Using Ureolytic Metschnikowia Pulcherrima and Raoultella Planticola Strains

Heavy Metals Bioremediation and Water Softening Using Ureolytic Metschnikowia Pulcherrima and Raoultella Planticola Strains

Extracellular synthesis of silver nanoparticles using entomopathogenic fungus: characterization and antibacterial potential

Unveiling the role of novel biogenic functionalized CuFe hybrid nanocomposites in boosting anticancer, antimicrobial and biosorption activities

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