Microbiote shift in sequencing batch reactors in response to antimicrobial ZnO nanoparticles

Zinc oxide nanoparticles (ZnO NPs) have been monitored in wastewater treatment plants as their potential adverse effects on functional microorganisms have been causing increasing concern.

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Reusability performance of green zinc oxide nanoparticles for photocatalysis of bathroom greywater

Water Practice & Technology ◽

10.2166/wpt.2020.118 ◽

2020 ◽

Author(s):

G. Yashni ◽

Adel Al-Gheethi ◽

Radin Mohamed ◽

Mohammed Al-Sahari

Keyword(s):

Zinc Oxide ◽

Wastewater Treatment ◽

Zno Nanoparticles ◽

Wastewater Treatment Plant ◽

Zinc Oxide Nanoparticles ◽

Treatment Plant ◽

Oxide Nanoparticles ◽

Zno Nps ◽

Fixed Film

Abstract This study aims to investigate the potential of green zinc oxide nanoparticles (ZnO NPs) in reusability performance for photocatalysis of bathroom greywater. It was found that ZnO NPs photocatalytic treatment of real bathroom greywater (RBGW) effluent reduces both the COD and BOD5 concentrations by 72.01, 62.75 and 57.79% (COD) and 70.18, 60.32 and 57.56% (BOD5) respectively for the first, second and third cycle. Meanwhile for the photocatalysis of ABGW, it was observed that COD and BOD5 were removed by 82.27, 68.27 and 60.96% (COD) and 82.91, 74.37 and 60.39% (BOD5) for the first, second and third cycle respectively. Besides, TSS and turbidity were reduced by 52.34, 46.85 and 37.98% (TSS) and 80.38, 67.65 and 56.81% (turbidity) respectively in RBGW and for ABGW, TSS and turbidity were reduced by 60.94, 52.37 and 41.95% (TSS) and 80.68, 72.63 and 69.91% (turbidity) for the first, second and third experimental run respectively. This designates that green ZnO NPs can be reused multiple times as an effective photocatalyst. However, ZnO NPs was used in the dispersed form which causes difficulty in the separation of ZnO NPs from the greywater. Thus, further investigation in producing appropriate fixed film should be focused. Moreover, phytotoxicity analysis of V. radiate seeds in the treated ABGW and RBGW was not significantly different from their germination in water. This assured the less lethal nature of the degradation metabolites in greywater effluent. This investigation would be a solution to wastewater treatment plant for reusing photocatalyst in order to achieve the development of advanced and greener technologies. Highlight We would like to submit a manuscript titled ‘Reusability performance of green zinc oxide nanoparticles for photocatalysis of bathroom greywater’ to your Journal for possible evaluation. In this article, the potential of green ZnO Nanoparticles in degrading bathroom greywater discussed. The reusability performance of green zinc oxide nanoparticles for photocatalysis of bathroom greywater also discussed.

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Electrochemical properties of green synthesised Zinc oxide (ZnO) Nanoparticles

MRS Advances ◽

10.1557/adv.2020.119 ◽

2020 ◽

Vol 5 (21-22) ◽

pp. 1103-1112

Author(s):

G.G. Welegergs ◽

H.G. Gebretinsae ◽

R. Akoba ◽

N. Matinsie ◽

Z. Y. Nuru ◽

...

Keyword(s):

Zinc Oxide ◽

Electrochemical Properties ◽

Zno Nanoparticles ◽

Zinc Oxide Nanoparticles ◽

Papaver Somniferum ◽

Toxic Chemicals ◽

Oxide Nanoparticles ◽

Zno Nps ◽

Bode Plot ◽

Green Approach

AbstractBio-reduction agents are being explored to synthesised nanoparticles to minimize the effects of toxic chemicals. The present study was focused on green approach for the synthesis of zinc oxide nanoparticles using aqueous seeds extract of Papaver somniferum. The biosynthesised ZnO NPs (27.8nm) were characterized by using of spectroscopy and microscopy instruments. The surface morphology and the structural analysis confirms the formation of hexagonal nanostructure and a pure zincite nature of ZnO nanoparticles (NPs) respectively. The EDS spectrum confirms pure ZnO NPs were synthesised. From electrochemical properties, the CV indicates both anodic and cathodic sweep are quasi-reversible properties whose intensity increases with the scan rates. The bode plot shows the maximum angles of 74o which is an indication of a higher conductivity of ZnO NPs.

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Study of the toxicity of ZnO nanoparticles to Chlorella sorokiniana under the influence of phosphate: spectroscopic quantification, photosynthetic efficiency and gene expression analysis

Environmental Science Nano ◽

10.1039/c9en01464k ◽

2020 ◽

Vol 7 (5) ◽

pp. 1431-1443

Author(s):

Hong Zhang ◽

Zhu Chen ◽

Qing Huang

Keyword(s):

Gene Expression ◽

Zinc Oxide ◽

Zno Nanoparticles ◽

Aquatic Environment ◽

Zinc Oxide Nanoparticles ◽

Photosynthetic Efficiency ◽

Gene Expression Analysis ◽

Chlorella Sorokiniana ◽

Oxide Nanoparticles ◽

Zno Nps

Zinc oxide nanoparticles (ZnO NPs) are one of the most abundantly applied nanomaterials in nanotechnology-based industries, and recent research continues to highlight their transformations and potential eco-toxicity especially to aquatic environment.

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Biosynthesis and Characterization of Zinc Oxide Nanoparticles for the Systemic Treatment of Patients with Lymphoma in Nursing Care

Science of Advanced Materials ◽

10.1166/sam.2020.3529 ◽

2020 ◽

Vol 12 (1) ◽

pp. 137-143

Author(s):

Lingling Meng ◽

Lina Du ◽

Yaqiong Shen ◽

Shan Cong ◽

Qiuyan Zhai ◽

...

Keyword(s):

Zinc Oxide ◽

Zno Nanoparticles ◽

Zinc Oxide Nanoparticles ◽

Systemic Treatment ◽

Oxide Nanoparticles ◽

Zno Nps ◽

Environment Friendly ◽

Oxide Nanoparticle ◽

T Lymphoma

Zinc oxide (ZnO) nanoparticles recently are of significant consideration because of their applications as nontoxic metal oxides. This study is mainly intended to improve a simple, efficient, and environment-friendly method for preparation of ZnO nanoparticles. This process has been developed based on plant-intervened synthesis by making use of microwave Saturejahortensis aqueous extract. We have further characterized the obtained Zinc oxide nanoparticles by using different techniques. Additionally, their cytotoxic potential was inspected via MTT assay against both B lymphoma, A20 and T lymphoma, EL4 cells lines. The zinc oxide nanoparticle exposed cells for about 24 h showed diminished cell viability in the tested cell lines where EL4 cells has been reduced to 75% of control after 24 h, whereas A20 cells were lowered to 68% of control. ZnO-NPs have proficiently hindered EL4 cell DNA synthesis at 100 μg concentration whereas completely blocked the DNA proliferation at about 50 g concentration. However, A20 cells besides presented similar propensity, thus exploring the ZnO-NPs potential to treat lymphomas.

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Mechanistic Study of Antibacterial Properties of Chemically Synthesize Zinc Oxide Nanoparticles

Advanced Nano Research ◽

10.21467/anr.2.1.42-52 ◽

2019 ◽

Vol 2 (1) ◽

pp. 42-52

Author(s):

Abdur Rehman ◽

Saira Ahmad ◽

Abdul Mateen ◽

Huma Qamar ◽

Mudaber Ahmad Mubashar ◽

...

Keyword(s):

Zinc Oxide ◽

Zno Nanoparticles ◽

Bacterial Strain ◽

Zinc Oxide Nanoparticles ◽

Sol Gel ◽

Antibacterial Properties ◽

Mechanistic Study ◽

Oxide Nanoparticles ◽

Zno Nps ◽

Wide Range

Nanotechnology is the science, engineering and technology conducted at the scale that ranges between 1-100 nanometers. For the bio-application, evolution of nanotechnology is creating the concern of scientists towards the synthesis of nanoparticles. The nanoparticles have unique characteristics as compare to bulk materials. Zinc oxide (ZnO) is a matchless semiconductor and it has been under investigation due to its wide range of applications in various areas like biomedical, electronics, material science and optics. In the present work synthesis of ZnO nanoparticles was carried out by using simple chemical approach, Sol-gel method for being effective and inexpensive, by employing zinc acetate dehydrate Zn (CH3CO2)2.2H2O as a precursor and sodium hydroxide (NaOH) starch as a constant agent. The structural properties of resultant zinc oxide nanoparticles were investigated by X-ray diffraction (XRD) technique. The XRD data confirmed the hexagonal wurtzite structure of ZnO powder confirmed by JCPDS 36-1451 data. Particles size was calculated by Scherrer formula and calculated size was 30.14 nm. These nanoparticles were investigated for inhibition zone of bacterial strain Escherichia coli, a gram-negative microbe, at various concentrations of ZnO nanoparticles. Zinc oxide nanoparticles were very proficient for inhibition of growth of bacterial strain E. coli. The mechanism of ZnO NPs for antibacterial activity is release of reactive oxygen species which not only hydrolyze cell wall but cell membrane and cellular components as well providing a potential bactericidal effect.

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Biosynthesis and Characterization of Zinc Oxide Nanoparticles Using Leaf Extract of Phoenix Dactylifera and Their Impact on Biomass and Bioactive Compounds in Juniperus Procera in Vitro

10.21203/rs.3.rs-785817/v1 ◽

2021 ◽

Author(s):

Abdalrhaman Salih ◽

Fahad Al Qurainy ◽

Salim Khan ◽

Mohamed Tarroum ◽

Mohammad Nadeem ◽

...

Keyword(s):

Zinc Oxide ◽

Zno Nanoparticles ◽

Zinc Oxide Nanoparticles ◽

Biochemical Parameters ◽

Phoenix Dactylifera ◽

Oxide Nanoparticles ◽

Zno Nps ◽

Phytochemical Compounds ◽

Juniperus Procera

Abstract Biosynthesized nanoparticles have played vital role recently, as suggested to be alternative to physical and chemical methods. In this study, biosynthesis of zinc oxide nanoparticles (ZnO NPs) were carried out using leaf extracts of Phoenix dactylifera and Zinc nitrate. The effect of ZnO nanoparticles on biomass and biochemical parameters was investigated. Biosynthesized ZnO nanostructure was characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM), UV–visible spectrophotometer and Fourier transform infrared spectroscopy (FTIR). Which resulted in spherical shape with size ranging between 16 to 35 nm of Biosynthesized ZnO nanoparticles and UV absorption beak at 370.5 nm with clear peaks of functional groups. The impact of different concentrations (0.0 mg/L, 80 mg/L and 160 mg/L) of biosynthesized ZnO nanoparticles on biomass and bioactive compounds production of Juniperus Procera in vitro was investigated. The results showed that, biosynthesized ZnO NPs (80 mg /L and 160 mg/L) concentrations were boosted the growth of J. Procera with significantly compared to non-treated plants in vitro. The highest concentration (160mg/L) of ZnO NPs was enhanced the growth of plant at beginning period, one month later shoots became yellow and callus turned to be brownish. Moreover, the influence of ZnO NPs on phytochemical compounds in callus of Juniperus procera was examined using GC-MS analysis. The differences among treatments were recoded. Overall, zinc oxide nanoparticles substantially improved the growth of shoots and callus with increasing of biochemical parameters such as chlorophyll a, total phenolic and flavonoids contents, besides the total protein and, SOD, CAT and APX activity. ZnO NPs might be induced some phytochemical compounds as well as inhibit.

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Biosynthesis of ZnO Nanostructures Using Azadirachta indica Leaf Extract and Their Effect on Seed Germination and Seedling Growth of Tomato: An Eco-Friendly Approach

Journal of Nanoelectronics and Optoelectronics ◽

10.1166/jno.2020.2891 ◽

2020 ◽

Vol 15 (11) ◽

pp. 1412-1422

Author(s):

Nishat Arshi ◽

Y. Prashanthi ◽

Tentu Nageswara Rao ◽

Faheem Ahmed ◽

Shalendra Kumar ◽

...

Keyword(s):

Zinc Oxide ◽

Seed Germination ◽

Azadirachta Indica ◽

Zno Nanoparticles ◽

Zinc Oxide Nanoparticles ◽

Leaf Extract ◽

Oxide Nanoparticles ◽

Zno Nps ◽

X Ray ◽

The Impact

In this study, we report synthesis of Zinc oxide nanoparticles using simple chemical and green methods. The ZnO nanoparticles were synthesized using leaf extract of Azadirachta indica (neem) as reducing agent. The as obtained product was characterized by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), Energy dispersive X-ray analysis (EDAX) and TEM techniques. XRD analysis confirms that ZnO nanoparticles were crystalline having hexagonal Wurtzite structure with (1 0 0), (0 0 2), (1 0 1), (1 0 2), (1 1 0) and (1 1 2) planes. SEM analyses show that the as synthesized ZnO NPs were in the form of agglomerates and no other impurity peak was found in the EDS. TEM analyses confirm that the size of the nanoparticle was approx. 50 nm. Here in, we investigate the effect of chemical and green synthesized zinc oxide nanoparticles on germination and growth of lycopersicum esculentus (tomato) using petri plate seed germination method in loamy sand soil. The impact of concentration of applied ZnO nanoparticles via green synthesis and chemical methods were analyzed. Results revealed that green synthesized Zinc oxide nanoparticles showed maximum growth of seedling as compared to chemically synthesized Zinc oxide nanoparticles, bulk ZnO and control. After 50 days of tomato growth analysis, it was recognized that ZnO NPs can be a good green synthetic fertilizer by increasing shoot length, wet weight, dry weight and yield over conventional control. Hence, green method is found to be more effective.

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Zinc Oxide Nanoparticles Cytotoxicity and Release from Newly Formed PMMA–ZnO Nanocomposites Designed for Denture Bases

Nanomaterials ◽

10.3390/nano9091318 ◽

2019 ◽

Vol 9 (9) ◽

pp. 1318 ◽

Cited By ~ 10

Author(s):

Mariusz Cierech ◽

Jacek Wojnarowicz ◽

Adam Kolenda ◽

Agata Krawczyk-Balska ◽

Emilia Prochwicz ◽

...

Keyword(s):

Zinc Oxide ◽

Zno Nanoparticles ◽

Zinc Oxide Nanoparticles ◽

Host Cells ◽

Emission Spectrometry ◽

Oxide Nanoparticles ◽

Pure Pmma ◽

Zno Nps ◽

Cytotoxicity Studies ◽

The Impact

The goal of the study was to investigate the level of zinc oxide nanoparticles (ZnO NPs) release from polymethyl methacrylate (PMMA)–ZnO nanocomposites (2.5%, 5%, and 7.5% w/w), as well as from the ZnO NPs layer produced on pure PMMA, and the impact of the achieved final ZnO NPs concentration on cytotoxicity, before the potential use as an alternative material for denture bases. The concentration of ZnO nanoparticles released to the aqueous solution of Zn2+ ions was assessed using optical emission spectrometry with inductively coupled plasma (ICP-OES). In the control group (pure PMMA), the released mean for ZnO was 0.074 mg/L and for individual nanocomposites at concentrations of 2.5%, 5%, and 7.5% was 2.281 mg/L, 2.143 mg/L, and 3.512 mg/L, respectively. The median for the ZnO NPs layer produced on PMMA was 4.878 mg/L. In addition, in vitro cytotoxicity of ZnO NPs against the human HeLa cell line was determined through the reduction of 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) dye. The cytotoxicity studies demonstrate that ZnO nanoparticles in the concentrations up to 20 mg/L have no adverse effect on HeLa cells. When compared with the released and cytotoxic concentrations of ZnO NPs, it can be expected that ZnO released from dental prostheses to the oral cavity environment will have no cytotoxic effect on host cells.

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Leonotis Nepetifolia Mediated Eco-Friendly Synthesis of Zno Nps: Photocatalytic, Antioxidant Activities and Their Applications to Nano-Composite Electrode Material for Supercapacitor

10.21203/rs.3.rs-602808/v1 ◽

2021 ◽

Author(s):

Gajendran Pavithra ◽

Santhakumar kannappan

Keyword(s):

Electron Microscopy ◽

Zinc Oxide ◽

Zno Nanoparticles ◽

Zinc Oxide Nanoparticles ◽

Antioxidant Activities ◽

Electrochemical Analysis ◽

Oxide Nanoparticles ◽

Zno Nps ◽

Pure Zinc ◽

X Ray

Abstract The present paper describes the green synthesis of Zinc oxide nanoparticles (ZnO NPs) from the flowers of L. nepetifolia. The synthesis of ZnO nanoparticles and examined by using Ultraviolet-visible spectroscopy, Fourier Transform-Infrared spectroscopy, X-ray Diffraction analysis, Dynamic Light Scattering analysis, Raman spectroscopy, Scanning Electron Microscopy and Energy Dispersive X-ray spectroscopy, Transmission Electron Microscopy, and Thermogravimetric Analysis. The photocatalytic studies were followed using methylene blue (MB) dye by ZnO nanoparticles by using sunlight as a source. The degradation of MB dye is found to be 90 %. Then the synthesized ZnO nanoparticles help to evaluate the antioxidant activities. The antioxidant activities of ZnO nanoparticles were exhibiting through scavenging of Nitric oxide, Hydrogen peroxide, and DPPH free radicals. Furthermore, the electrochemical analysis of reduced Graphene Oxide-Zinc oxide (rGO-ZnO) nanocomposite shows that the prepared rGO-ZnO nanocomposite has a high specific capacitance of about 667 F g-1 in comparison with the pure Zinc oxide nanoparticles (200 F g-1) and has good cycling stability of around 1000 cycles. The synthesis of multifunctional ZnO nanoparticles by using natural plant products like seeds, leaves, flowers, etc may help to explore as environment-friendly which is opposite to chemical synthesis.

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