Effect of engineered nanoparticles on growth of Lemna sp.

Nanotechnology is the technology relating to the synthesis and application of materials with nanometer sizes (nm). At the nanoscale, materials will have special features than traditional materials because their specific size is smaller than 100 nm, larger surface to volume ratio, crystalline structure, high reactivity potential, creating the effect of resonance Plasmon surface... Materials application process also potential risks to health and the environment. To evaluate the safety of nanomaterial in water environment, the experiments on aquatic organisms should be carried out to test the toxicological effects of nanomaterial. Duckweed used as a model organism because of unique difference characteristics from other plants as they could provide a new material source for the production of fuel and biogas, rapidly grow in a short time that requires little soil and nutrition. Duckweed is aquatic plants are widely used in the treatment of water pollution because it has the ability to absorb the nutrients of nitrogen and phosphorus. The aim of this work was to evaluate the influence of silver nanoparticles on growth of Lemna sp. The silver nanoparticles were synthesized by electrochemical and reduction method. Characterizations of these nanoparticles were Transmission electron microscopy (TEM), Scanning Electron Microscope (SEM) and Ultraviolet-Visible (UV - VIS) methods. The weight of Lemna sp. was compared between the first day and the last day of the experiment period (7 th day of cultivation). The results showed that nano materials show growth inhibition against Lemna sp. At concentration of 1 and 5 ppm of silvernano solutions, a maximum anti-Lemna sp. activity was observed.

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Influences of nanoparticles on aquatic organisms: Current situation of nanoparticles effects in aquatic ecosystems

Sustainable Engineering and Innovation, ISSN 2712-0562 ◽

10.37868/sei.v3i1.id136 ◽

2021 ◽

Vol 3 (1) ◽

pp. 54-60

Author(s):

Didem Gökçe

Keyword(s):

Aquatic Ecosystems ◽

Aquatic Organisms ◽

High Reactivity ◽

Freshwater Ecosystems ◽

Engineered Nanoparticles ◽

Adverse Impacts ◽

Wide Range ◽

Mean Size ◽

Level Of Aggregation ◽

Physical And Chemical

The quick improvement of nanotechnology permits a wide range of utilization of engineered nanoparticles, such as personal care products, medicals, optics, electronics, and automobiles. The nanoparticles manufactured from Ag, Au carbon-nanotube, ZnO, SiO2, TiO2, Cu, Ni, and magnetic ferrites are among the generally utilized in products. The nanoparticles are produced and utilized in large quantities and release into marine and freshwater ecosystems during production, use, discharge, treatment, and deposition. Those particles with a mean size of 1 nm - 100 nm are of potential environmental risks because of their particular qualifications and high reactivity although their great economical values. Based on the studies, the size, shape, and surface physical and chemical characteristics of the nanoparticles show the level of aggregation, solubility, structural and chemical composition, the importance of the use of nanoparticles, and their toxicity with biological systems. Nanoparticles can potentially cause adverse impacts on tissue, cellular, genetic materials, and protein- enzyme levels due to their unique physical and chemical qualifications. In this study, the effects of nanoparticles on aquatic organisms and aquatic ecosystems were evaluated.

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Synthesis of Biocompatible Silver Nanoparticles and Nanotoxicity in Aquatic Ecosystems

MRS Advances ◽

10.1557/adv.2020.1 ◽

2020 ◽

Vol 5 (16) ◽

pp. 805-813

Author(s):

Jousen A. Merced-Colón ◽

David Medina-Suarez ◽

Gabriela M. Mercado-Guzmán ◽

Sonia J. Bailón

Keyword(s):

Silver Nanoparticles ◽

Aquatic Ecosystems ◽

Negative Refraction ◽

High Surface ◽

Volume Ratio ◽

Aquatic Organisms ◽

Artemia Salina ◽

Ag Nps ◽

Spherical Form ◽

Vis Spectroscopy

ABSTRACTSilver nanoparticles (Ag NPs) have unique optical, electrical, and thermal properties and are being incorporated into products that range from photovoltaics to biological and chemical sensors. The production of silver nanoparticles has been increasing worldwide in the nanotechnology industry due to the variety of applications and are very likely to reach aquatic ecosystems damaging them. Due to their small size and high surface area to volume ratio of NPs, they can strongly interact with life cells and cause damage to tested animals. Based on the mentioned previously, it is necessary to evaluate the silver nanoparticle nanotoxicity in aquatic ecosystems to prevent possible ingestion or transfer to humans. Also, the research will benefit aquatic systems due to less pollution around aquatic organisms. The objectives of this research included: i) production and characterization of stable silver nanoparticles in water, ii) characterizing the optical properties by UV-Vis spectroscopy and morphology by HR-TEM and; iii) evaluate the toxicity of silver nanoparticles in aquatic organisms, i.e Artemia salina. Results obtained evidenced that Ag NPs showed an intense absorption peak at 448 nm. This broad peak is due to the phenomenon called surface plasmon resonance (SPR) that is responsible for a variety of phenomena, including nanoscale optical focusing, negative refraction, and surface-enhanced Raman scattering. HR-TEM measurements evidenced the spherical form of the nanoparticles and its small size at around 12-20 nm. In addition, Electron Diffraction analyses suggested the composition of the nanoparticle, which contained only Ag0. The toxicity assays were evaluated using different concentrations of purified Ag NPs. During the cytotoxicity assay, it was demonstrated that Ag NPs were not toxic to Artemia salina after 24 and 48 hours of exposure. However, silver (as silver nitrate) evidenced high toxicity to Artemia salina at larval stage.

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Size-controlled fabrication of silver nanoparticles using the Hedyotis puberula leaf extract: toxicity on mosquito vectors and impact on biological control agents

RSC Advances ◽

10.1039/c6ra23208f ◽

2016 ◽

Vol 6 (99) ◽

pp. 96573-96583 ◽

Cited By ~ 7

Author(s):

Raja Mohamed Sait Thameem Azarudeen ◽

Marimuthu Govindarajan ◽

Abubucker Amsath ◽

Shine Kadaikunnan ◽

Naiyf S. Alharbi ◽

...

Keyword(s):

Biological Control ◽

Silver Nanoparticles ◽

Leaf Extract ◽

Low Cost ◽

Aquatic Organisms ◽

Capping Agent ◽

Mosquito Vectors ◽

Biological Control Agents ◽

Size Controlled ◽

Control Tool

As a low-cost and eco-friendly control tool, Ag nanoparticles were fabricated usingHedyotis puberulaaqueous extract as a reducing and capping agent and showed potent activity against malaria and arbovirus vectors with low biotoxicity against non-target aquatic organisms.

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Optimization and Characterization of Biogenic Silver Nanoparticles Synthesized by Leaves Extract of Alphonsea Madraspatana

Current Bioactive Compounds ◽

10.2174/1573407217666210223092824 ◽

2021 ◽

Vol 17 ◽

Author(s):

Amita Sahu ◽

Sudhanshu Shekhar Swain ◽

Goutam Ghosh ◽

Deepak Pradhan ◽

Dipak Kumar Sahu ◽

...

Keyword(s):

Silver Nanoparticles ◽

Volume Ratio ◽

Xrd Analysis ◽

Biofilm Inhibition ◽

Nano Silver ◽

E Coli ◽

Biogenic Silver Nanoparticles ◽

Icp Ms ◽

Anti Oxidant

Background: Literature evidences as well as traditional uses of genus Alphonsea reveal significant antimicrobial and anti-oxidant activity, which encourages to consider A. madraspatana to have potent antimicrobials, there by offering potential adjuncts to synthesize improved antimicrobial Silver nanoparticles (AgNPs). The objective of the present exposition is to optimize reaction parameters to synthesize antimicrobial Biogenic Silver nanoparticles (BAgNPs) from extract of A. madraspatana leaves (AML) and to evaluate the effect against bacteria. Methods: BAgNPs was synthesized by optimized reaction. The Synthesized nanoparticles were characterized by UV, IR, ICP-MS and XRD analysis. The antibacterial potency of optimized BAgNPs was evaluated against E. coli by comparing with positive controls. Results: Results of optimization process indicate nanoscale BAgNPs were produced at operating temp. of 45°C for 120 min at pH 8 with 1:5 volume ratio of AgNO3 and extract. Optimized BAgNPs exhibits relatively higher antimicrobial activity (31±1mm) compared to Ciprofloxacin (27±1mm) and marketed nano silver (28± 2 mm). The developed BAgNPs shows comparable biofilm inhibition (86.50%) as compared to marketed nano silver (88.10%) and Ciprofloxacin (83.10%). Conclusion: Experimental evidence suggests methanolic extract of AML under predefined conditions successfully generate nano-template of silver with better antibacterial response against E. coli.

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Lifetime bioaccumulation of silver nanoparticles accelerates functional aging by inactivating antioxidant pathways, an effect reversed by pterostilbene

Environmental Science Nano ◽

10.1039/d1en00655j ◽

2021 ◽

Author(s):

Zi-Yu Chen ◽

Yu-Chen Su ◽

Fong-Yu Cheng ◽

Shian-Jang Yan ◽

Ying-Jan Wang

Keyword(s):

Reactive Oxygen Species ◽

Silver Nanoparticles ◽

Adverse Effects ◽

Signaling Pathways ◽

Reactive Oxygen ◽

Engineered Nanoparticles ◽

Stress Signaling ◽

Oxygen Species ◽

Safety Concerns

Engineered nanoparticles raise safety concerns. Silver nanoparticles (AgNPs) exert acute and chronic adverse effects by inducing reactive oxygen species (ROS)-mediated stress signaling pathways. We investigated the mechanisms by which AgNPs...

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Development and evaluation of the Lake Multi-biotic Integrity Index for Dongting Lake, China

Journal of Limnology ◽

10.4081/jlimnol.2015.1186 ◽

2015 ◽

Cited By ~ 2

Author(s):

Xing Wang ◽

Binghui Zheng ◽

Lusan Liu ◽

Lijing Wang

Keyword(s):

Water Quality ◽

Water Environment ◽

Aquatic Organisms ◽

Dongting Lake ◽

Assessment System ◽

Biotic Integrity ◽

Diatom Index ◽

Integrity Index ◽

Biotic Integrity Index

<p>A Lake Multi-biotic Integrity Index (LMII) for the China’s second largest interior lake (Dongting Lake) was developed to assess the water quality status using algal and macroinvertebrate metrics. Algae and benthic macroinvertebrate assemblages were sampled at 10 sections across 3 subregions of Dongting Lake. We used a stepwise process to evaluate properties of candidate metrics and selected ten for the LMII: Pampean diatom index, diatom quotient, trophic diatom index, relative abundance diatoms, Margalef index of algae, percent sensitive diatoms, % facultative individuals, % Chironomidae individuals, % predators individuals, and total number of macroinvertebrate taxa. We then tested the accuracy and feasibility of the LMII by comparing the correlation with physical-chemical parameters. Evaluation of the LMII showed that it discriminated well between reference and impaired sections and was strongly related to the major chemical and physical stressors (r = 0.766, P<0.001). The re-scored results from the 10 sections showed that the water quality of western Dongting Lake was good, while that of southern Dongting Lake was relatively good and whereas that of eastern Dongting Lake was poor. The discriminatory biocriteria of the LMII are suitable for the assessment of the water quality of Dongting Lake. Additionally, more metrics belonging to habitat, hydrology, physics and chemistry should be considered into the LMII, so as to establish comprehensive assessment system which can reflect the community structure of aquatic organisms, physical and chemical characteristics of water environment, human activities, and so on.</p>

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Sucrose density gradient centrifugation for efficient separation of engineered nanoparticles from a model organism, Caenorhabditis elegans

10.6028/nist.sp.1200-24 ◽

2017 ◽

Author(s):

M E Johnson ◽

A R Montoro Bustos ◽

S K Hanna ◽

E J Petersen ◽

K E Murphy ◽

...

Keyword(s):

Caenorhabditis Elegans ◽

Density Gradient ◽

Density Gradient Centrifugation ◽

Gradient Centrifugation ◽

Model Organism ◽

Sucrose Density Gradient ◽

Engineered Nanoparticles ◽

Sucrose Density Gradient Centrifugation ◽

Efficient Separation

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A proposed sustainable BNR plant with the emphasis on recovery of COD and phosphate

Water Science & Technology ◽

10.2166/wst.2003.0021 ◽

2003 ◽

Vol 48 (1) ◽

pp. 77-85 ◽

Cited By ~ 8

Author(s):

X.-D. Hao ◽

M.C.M. van Loosdrecht

Keyword(s):

Wastewater Treatment ◽

Municipal Wastewater ◽

Water Environment ◽

Pilot Scale ◽

Ammonium Oxidation ◽

Municipal Wastewater Treatment ◽

Nitrogen And Phosphorus ◽

Water Problems ◽

Sustainable Wastewater Treatment ◽

The Impact

Water problems have to be solved in an integrated way, and sustainability has become a major issue. For this reason, developing more sustainable wastewater treatment processes is needed. New discoveries and good understanding on microbial conversions of nitrogen and phosphorus make more sustainable processes possible. New options for decentralized sustainable sanitation are generally compared to conventional sewage systems, we think that for a proper comparison also innovative centralized treatment schemes should be evaluated. In this article, a more sustainable WWTP is proposed for municipal wastewater treatment, mainly based on the principles of denitrifying dephosphatation and anaerobic ammonium oxidation (ANAMMOX). The proposed system consists of a first stage of the A/B process in which maximal sludge production is achieved. In this way, COD is regained as sludge for methanation. The following BCFS® and CANON processes can remove N and P with minimal or no COD need. As a potential fertiliser, struvite can easily be removed from the sludge water by adding magnesium compounds. A case study is done on the basis of the mass balance over the proposed plant. The effluent from the system has a good quality to be recycled. This could also make a contribution to meeting the world's water needs and lessening the impact on the world's water environment. Since all the separate units are already applied or tested on pilot-scale, no problems for technical implementation are foreseen.

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The Future of Nanotechnology in Plant Pathology

Annual Review of Phytopathology ◽

10.1146/annurev-phyto-080417-050108 ◽

2018 ◽

Vol 56 (1) ◽

pp. 111-133 ◽

Cited By ~ 55

Author(s):

Wade Elmer ◽

Jason C. White

Keyword(s):

Disease Management ◽

Plant Disease ◽

Carbon Nanomaterials ◽

Management Strategies ◽

Genetic Material ◽

High Reactivity ◽

Engineered Nanoparticles ◽

Metallic Oxide ◽

Disease Diagnostics ◽

Chemical Inputs

Engineered nanoparticles are materials between 1 and 100 nm and exist as metalloids, metallic oxides, nonmetals, and carbon nanomaterials and as functionalized dendrimers, liposomes, and quantum dots. Their small size, large surface area, and high reactivity have enabled their use as bactericides/ fungicides and nanofertilizers. Nanoparticles can be designed as biosensors for plant disease diagnostics and as delivery vehicles for genetic material, probes, and agrichemicals. In the past decade, reports of nanotechnology in phytopathology have grown exponentially. Nanomaterials have been integrated into disease management strategies and diagnostics and as molecular tools. Most reports summarized herein are directed toward pathogen inhibition using metalloid/metallic oxide nanoparticles as bactericides/fungicides and as nanofertilizers to enhance health. The use of nanoparticles as biosensors in plant disease diagnostics is also reviewed. As global demand for food production escalates against a changing climate, nanotechnology could sustainably mitigate many challenges in disease management by reducing chemical inputs and promoting rapid detection of pathogens.

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