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Tordi P, Gelli R, Ridi F, Bonini M. A bioinspired and sustainable route for the preparation of Ag-crosslinked alginate fibers decorated with silver nanoparticles. Carbohydr Polym 2024; 326:121586. [PMID: 38142067 DOI: 10.1016/j.carbpol.2023.121586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2023] [Revised: 10/17/2023] [Accepted: 11/10/2023] [Indexed: 12/25/2023]
Abstract
Functional materials obtained through green and sustainable routes are attracting particular attention due to the need to reduce the environmental impact of the chemical industry. In this work we propose a bioinspired approach for the preparation of alginate fibers containing silver nanoparticles (AgNPs), to be used for antimicrobial purposes. We demonstrate that filiform polymeric structures with length of a few meters can be easily obtained by extruding an alginate solution in an aqueous Ag+-containing bath (i.e. wet spinning) and that treating the fibers with freshly-squeezed lemon juice leads to the formation of AgNPs homogeneously distributed within the polymeric network. Using mixtures of ascorbic and citric acid to mimic lemon juice composition we highlight the influence of the aforementioned molecules on the nanoparticles formation process as well as on the properties of the fibers. Varying the amount of citric and ascorbic acid used for the treatment allows to finely tune the thermal, morphological and water absorption properties of the fibers. This evidence, along with the possibility to easily monitor the preparation through FT-IR spectroscopy, endows the fibers with a high application potential in several fields such as wound healing, water/air purification and agriculture.
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Affiliation(s)
- Pietro Tordi
- Department of Chemistry "Ugo Schiff" and CSGI, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, Florence, Italy; Institut de Science et d'Ingeniérie Supramoléculaires (ISIS) - Université de Strasbourg and CNRS, 8 Alleé Gaspard Monge, F-67000 Strasbourg, France
| | - Rita Gelli
- Department of Chemistry "Ugo Schiff" and CSGI, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, Florence, Italy
| | - Francesca Ridi
- Department of Chemistry "Ugo Schiff" and CSGI, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, Florence, Italy
| | - Massimo Bonini
- Department of Chemistry "Ugo Schiff" and CSGI, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, Florence, Italy.
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2
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Bharti S. Harnessing the potential of bimetallic nanoparticles: Exploring a novel approach to address antimicrobial resistance. World J Microbiol Biotechnol 2024; 40:89. [PMID: 38337082 DOI: 10.1007/s11274-024-03923-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2023] [Accepted: 02/05/2024] [Indexed: 02/12/2024]
Abstract
The growing global importance of antimicrobial resistance (AMR) in public health has prompted the creation of innovative approaches to combating the issue. In this study, the promising potential of bimetallic nanoparticles (BMNPs) was investigated as a novel weapon against AMR. This research begins by elaborating on the gravity of the AMR problem, outlining its scope in terms of the effects on healthcare systems, and stressing the urgent need for novel solutions. Because of their unusual features and wide range of potential uses, bimetallic nanoparticles (BMNPs), which are tiny particles consisting of two different metal elements, have attracted a lot of interest in numerous fields. This review article provides a comprehensive analysis of the composition, structural characteristics, and several synthesis processes employed in the production of BMNPs. Additionally, it delves into the unique properties and synergistic effects that set BMNPs apart from other materials. This review also focuses on the various antimicrobial activities shown by bimetallic nanoparticles, such as the rupturing of microbial cell membranes, the production of reactive oxygen species (ROS), and the regulation of biofilm formation. An extensive review of in vitro studies confirms the remarkable antibacterial activity of BMNPs against a variety of pathogens and sheds light on the dose-response relationship. The efficacy and safety of BMNPs in practical applications are assessed in this study. It also delves into the synergistic effects of BMNPs with traditional antimicrobial drugs and their ability to overcome multidrug resistance, providing mechanistic insight into these phenomena. Wound healing, infection prevention, and antimicrobial coatings on medical equipment are only some of the clinical applications of BMNPs that are examined, along with the difficulties and possible rewards of clinical translation. This review covers nanoparticle-based antibacterial regulation and emerging uses. The essay concludes with prospects for hybrid systems, site-specific targeting, and nanoparticle-mediated gene and drug delivery. In summary, bimetallic nanoparticles have surfaced as a potential solution, offering the public a more promising and healthier future.
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Affiliation(s)
- Sharda Bharti
- Department of Biotechnology, National Institute of Technology (NIT) Raipur, Raipur, Chhattisgarh, 492010, India.
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3
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Derakhshani E, Asri M, Naghizadeh A. Plant-Based Green Synthesis of Copper Oxide Nanoparticles Using Berberis vulgaris Leaf Extract: an Update on Their Applications in Antibacterial Activity. BioNanoSci 2023. [DOI: 10.1007/s12668-023-01063-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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4
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Varun Kumar B, Reddy KH. Synthesis, characterization and antimicrobial activity of novel silver nanoparticles functionalized with nitrogenous ligands. INORG NANO-MET CHEM 2023. [DOI: 10.1080/24701556.2023.2165686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- B. Varun Kumar
- Department of Chemistry, Sri Krishnadevaraya University, Anantapuramu, AP, India
| | - K. Hussain Reddy
- Department of Chemistry, Sri Krishnadevaraya University, Anantapuramu, AP, India
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Vindhya PS, Kavitha VT. Leaf extract-mediated synthesis of Mn-doped CuO nanoparticles for antimicrobial, antioxidant and photocatalytic applications. Chem Pap 2022. [DOI: 10.1007/s11696-022-02631-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Kumar BV, Reddy KH. Green Synthesis, Characterization and Antimicrobial Activity of Silver Nanoparticles Using Aqueous Extracts of Allium cepa and Raphanus sativus. Int J Nanosci 2022. [DOI: 10.1142/s0219581x22500272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Green synthesis of nanoparticles is rapidly evolving because it is cost-effective and eco-friendly, this also contributes to its preference over nanoparticles from other sources. In this study, silver nanoparticles were synthesized from Allium cepa (AC) and Raphanus sativus (RS) aqueous extracts and the biological activities were evaluated. The silver nanoparticles AgNPs@AC and AgNPS@RS were synthesized from AC and RS extracts, respectively, using silver nitrate and characterized using UV–visible spectroscopy (UV–Vis), Fourier transform infrared (FT-IR) spectroscopy, Powder X-ray diffraction (PXRD), scanning electron microscope (SEM) and energy dispersive X-ray spectroscopy (EDX). The FT-IR spectra of AgNPs@AC and AgNPS@RS showed characteristic groups pertaining to active molecules of the respective extracts indicating their surface functionalization. The XRD pattern of AgNPs@AC revealed diffraction peaks at 38.26, 44.39, 64.65, 77.54 and 81.64 that were indexed to (1 1 1), (2 0 0), (2 2 0), (3 1 1) and (2 2 2) planes of face-centered cubic (FCC) crystalline structure, respectively. The XRD pattern of AgNPs@RS revealed diffraction peaks at 38.24, 44.32, 64.62, 77.46 and 81.65 that was indexed to (1 1 1), (2 0 0), (2 2 0), (3 1 1) and (2 2 2) planes of face-centered cubic (FCC) crystalline structure, respectively. The SEM images indicate that the particles are spherical in shape and have particle size in the range of 25–35[Formula: see text]nm. The nanoparticles demonstrated substantial antimicrobial activity against Gram [Formula: see text]ve and Gram [Formula: see text]ve harmful bacteria species, such as S. aureus, E. coli and fungal species C. albicans. This study shows that A. cepa (Onion) and R. sativus (Radish) aqueous extracts can be used as an effective reducing and capping agent for the green synthesis of silver nanoparticles (AgNP). AgNPS@RS showed acceptable size and shape of nanoparticles and could therefore be a potential source of antimicrobial agents.
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Affiliation(s)
- B. Varun Kumar
- Department of Chemistry, Sri Krishnadevaraya University, Anantapuramu-515003, Andhra Pradesh, India
| | - K. Hussain Reddy
- Department of Chemistry, Sri Krishnadevaraya University, Anantapuramu-515003, Andhra Pradesh, India
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Mazurkiewicz K, Jeż-Walkowiak J, Michałkiewicz M. Physicochemical and microbiological quality of rainwater harvested in underground retention tanks. Sci Total Environ 2022; 814:152701. [PMID: 34973316 DOI: 10.1016/j.scitotenv.2021.152701] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 12/20/2021] [Accepted: 12/22/2021] [Indexed: 06/14/2023]
Abstract
A study was made of the physicochemical properties (among others: pH, temperature, conductivity, hardness, chlorides, dissolved oxygen, ammonia, nitrites, nitrates, manganese, iron) and microbiological quality (coliform, psychrophilic and mesophilic microorganisms) of rainwater harvested from the roofs of three large buildings and from a parking lot, stored in three large underground tanks (with storage volume from 60 m3 to ca. 200 m3), including the variability of the quality. The underground tanks were located in the city of Poznań, and were characterized by different parameters, rainwater sources, rainwater treatment processes, and types of rainwater use. Samples of rainwater harvested in these tanks were collected from March 2019 to February 2020. Physicochemical and microbiological laboratory analyses were performed to determine selected parameters which have an impact on potential treatment and disinfection methods. The results obtained underwent statistical analysis. The laboratory tests showed that the physicochemical quality of rainwater collected in the three underground tanks met the Polish and EU requirements for drinking water standards. The main problem concerns microbiological quality: the number of coliform bacteria reached a value of 19,300 CFU/100 mL, the number of psychrophilic bacteria was over 264,000 CFU/1 mL, and the number of mesophilic bacteria was over 100,000 CFU/1 mL. Also the variability of microbiological quality was very high for all tanks. Analysis of the calcium carbonate equilibrium showed that the harvested water had corrosive properties. The treatment of the investigated rainwater for potable purposes should focus mainly on biological and chemical stability.
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Affiliation(s)
- Karolina Mazurkiewicz
- Institute of Environmental Engineering and Building Installations, Poznań University of Technology, Plac Marii Skłodowskiej-Curie 5, 60-965 Poznań, Poland.
| | - Joanna Jeż-Walkowiak
- Institute of Environmental Engineering and Building Installations, Poznań University of Technology, Plac Marii Skłodowskiej-Curie 5, 60-965 Poznań, Poland
| | - Michał Michałkiewicz
- Institute of Environmental Engineering and Building Installations, Poznań University of Technology, Plac Marii Skłodowskiej-Curie 5, 60-965 Poznań, Poland
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8
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Kusumawardhana A, Zlatanovic L, Bosch A, van der Hoek JP. Microbiological Health Risk Assessment of Water Conservation Strategies: A Case Study in Amsterdam. Int J Environ Res Public Health 2021; 18:2595. [PMID: 33807661 PMCID: PMC7967349 DOI: 10.3390/ijerph18052595] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 02/24/2021] [Accepted: 03/03/2021] [Indexed: 11/24/2022]
Abstract
The aim of this study was to assess the health risks that may arise from the implementation of greywater reuse and rainwater harvesting for household use, especially for toilet flushing. In addition, the risk of cross connections between these systems and the drinking water system was considered. Quantitative microbial risk assessment (QMRA) is a method that uses mathematical modelling to estimate the risk of infection when exposure to pathogens happens and was used in this study to assess the health risks. The results showed that using rainwater without prior treatment for toilet flushing poses an annual infection risk from L. pneumophila at 0.64 per-person-per-year (pppy) which exceeds the Dutch standard of 10-4 pppy. The use of untreated greywater showed a risk that is below the standard. However, treatment is recommended due to the ability of P. aeruginosa to grow in the reuse system. Moreover, showering and drinking with cross-connected water has a high annual infection risk that exceeds the standard due to contact with Staphylococcus aureus and E. coli O157:H7. Several measures can be implemented to mitigate the risks such as treating the greywater and rainwater with a minimum of 5-log removal, closing the toilet lid while flushing, good design of greywater and rainwater collection systems, and rigorous plumbing installation procedures.
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Affiliation(s)
- Agung Kusumawardhana
- Department of Water Management, Faculty of Civil Engineering and Geosciences, Delft University of Technology, P.O. Box 5, 2600 AA Delft, The Netherlands; (A.K.); (L.Z.)
| | - Ljiljana Zlatanovic
- Department of Water Management, Faculty of Civil Engineering and Geosciences, Delft University of Technology, P.O. Box 5, 2600 AA Delft, The Netherlands; (A.K.); (L.Z.)
- Amsterdam Institute for Advanced Metropolitan Solutions, Kattenburgerstraat 5, 1018 JA Amsterdam, The Netherlands
- Water Supply Company Noord-Holland PWN, Rijksweg 501, 1991 AS Velserbroek, The Netherlands
| | - Arne Bosch
- Waternet, P.O. Box 94370, 1090 GJ Amsterdam, The Netherlands;
| | - Jan Peter van der Hoek
- Department of Water Management, Faculty of Civil Engineering and Geosciences, Delft University of Technology, P.O. Box 5, 2600 AA Delft, The Netherlands; (A.K.); (L.Z.)
- Amsterdam Institute for Advanced Metropolitan Solutions, Kattenburgerstraat 5, 1018 JA Amsterdam, The Netherlands
- Waternet, P.O. Box 94370, 1090 GJ Amsterdam, The Netherlands;
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9
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Tăbăcaru A, Pettinari C, Bușilă M, Dinică RM. New Antibacterial Silver(I) Coordination Polymers Based on a Flexible Ditopic Pyrazolyl-Type Ligand. Polymers (Basel) 2019; 11:polym11101686. [PMID: 31618948 PMCID: PMC6835455 DOI: 10.3390/polym11101686] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 10/08/2019] [Accepted: 10/10/2019] [Indexed: 11/16/2022] Open
Abstract
In the last two decades, a tremendous amount of attention has been directed towards the design of antibacterial silver(I)-based materials, including coordination polymers (CPs) built up with a great variety of oxygen and nitrogen-containing ligands. Herein, a family of six new silver(I)-based CPs, having the general stoechiometric formula [Ag(H2DMPMB)(X)] (X = NO3, 1; CF3CO2, 2; CF3SO3, 3; BF4, 4; ClO4, 5; and PF6, 6) and incorporating the flexible ditopic pyrazolyl-type ligand 4,4'-bis((3,5-dimethyl-1H-pyrazol-4-yl)methyl)biphenyl (H2DMPMB), has been prepared by the chemical precipitation method involving the reaction of silver(I) salts with H2DMPMB in the 1:1 molar ratio, in alcohols, or acetonitrile at room temperature for two-hours. The new silver(I)-based polymeric materials were characterized by means of Fourier transform infrared spectroscopy (FTIR), elemental analysis (EA), and thermogravimetric analysis (TGA), allowing for the proposition that their structures comprise one-dimensional chains, with the silver(I) ions mostly assuming a T-shapped stereochemistry completed by the exo-bidentate ligands and counter-anions. The obtained silver(I) CPs showed a remarkable light insensitivity and stability in the air, are insoluble in water and in most common organic solvents, and possess appreciable thermal stabilities spanning the range 250-350 °C. The antibacterial activity of the obtained silver(I) CPs was tested against the Gram-negative bacteria Escherichia coli (E. coli) and Gram-positive bacteria Staphylococcus aureus (S. aureus) using the Tetrazolium/Formazan test (TTC), by measuring the bacterial viability at different time intervals. The complete reduction of both bacterial strains occurred after 24 h of exposure to all silver(I) CPs, the bacterial viability values for S. aureus reaching 8% for compounds 3, 5, and 6 after only two-hours.
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Affiliation(s)
- Aurel Tăbăcaru
- Faculty of Sciences and Environment, Department of Chemistry, Physics and Environment, "Dunarea de Jos" University of Galati, 111 Domneasca Street, 800201 Galați, Romania.
| | - Claudio Pettinari
- School of Pharmacy, University of Camerino, Via Madonna delle Carceri 9, 62032 Camerino MC, Italy.
| | - Mariana Bușilă
- Department of Materials Science and Engineering, Faculty of Engineering, "Dunarea de Jos" University of Galati, 111 Domneasca Street, 800201 Galați, Romania.
| | - Rodica Mihaela Dinică
- Faculty of Sciences and Environment, Department of Chemistry, Physics and Environment, "Dunarea de Jos" University of Galati, 111 Domneasca Street, 800201 Galați, Romania.
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Mohammed AN. Resistance of bacterial pathogens to calcium hypochlorite disinfectant and evaluation of the usability of treated filter paper impregnated with nanosilver composite for drinking water purification. J Glob Antimicrob Resist 2019; 16:28-35. [DOI: 10.1016/j.jgar.2018.09.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Revised: 09/07/2018] [Accepted: 09/12/2018] [Indexed: 10/28/2022] Open
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11
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Shen J, Cui C, Li J, Wang L. In Situ Synthesis of a Silver-Containing Superabsorbent Polymer via a Greener Method Based on Carboxymethyl Celluloses. Molecules 2018; 23:molecules23102483. [PMID: 30262771 PMCID: PMC6222526 DOI: 10.3390/molecules23102483] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2018] [Revised: 09/20/2018] [Accepted: 09/24/2018] [Indexed: 02/03/2023] Open
Abstract
An antibacterial superabsorbent polymer (SAP) was synthesized by grafting acrylic acid (AA) onto carboxymethyl cellulose (CMC) and mixing with silver particles, with N,N'-methylenebisacrylamide used as a crosslinker and potassium persulfate as an initiator. Silver nanoparticles were produced through the reaction between glucose and silver nitrate. The effects of the amount of silver nitrate added in the polymer on the swelling ratio were investigated and the maximum swelling ratio of the SAP loaded with silver particles in distilled water and in a 0.9 wt % NaCl solution reached 840 g/g and 71 g/g, respectively, when the silver nitrate added was 50 mg. The SAP was characterized by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, ultraviolet-visible spectroscopy, scanning electron microscopy, energy dispersive spectrometry, transmission electron microscopy, and thermogravimetric analysis. Through these analysis methods, it could be seen that the acrylic acid was successfully grafted onto CMC, forming a three-dimensional network structure, with the successful production of silver nanoparticles with sizes ranging from 5 nm to 50 nm. Moreover, the antibacterial properties of the SAP loaded with silver nanoparticles against Staphylococcus aureus and Escherichia coli were investigated and the results show that they became more effective with increasing silver nitrate concentration. The obtained SAP can be useful in developing new antibacterial medical and public health supplies.
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Affiliation(s)
- Jie Shen
- Key Laboratory of Bio-Based Materials Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China.
- Research Center of Wood Bionic Intelligent Science, Northeast Forestry University, Harbin 150040, China.
| | - Chang Cui
- Key Laboratory of Bio-Based Materials Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China.
- Research Center of Wood Bionic Intelligent Science, Northeast Forestry University, Harbin 150040, China.
| | - Jian Li
- Key Laboratory of Bio-Based Materials Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China.
- Research Center of Wood Bionic Intelligent Science, Northeast Forestry University, Harbin 150040, China.
| | - Lijuan Wang
- Key Laboratory of Bio-Based Materials Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China.
- Research Center of Wood Bionic Intelligent Science, Northeast Forestry University, Harbin 150040, China.
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12
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Elwakeel KZ, El-Liethy MA, Ahmed MS, Ezzat SM, Kamel MM. Facile synthesis of magnetic disinfectant immobilized with silver ions for water pathogenic microorganism's deactivation. Environ Sci Pollut Res Int 2018; 25:22797-22809. [PMID: 29855880 DOI: 10.1007/s11356-018-2071-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Accepted: 04/17/2018] [Indexed: 06/08/2023]
Abstract
One-pot synthesis of a new magnetic disinfectant was achieved through the polymerization of thiourea and formaldehyde in the presence of magnetite nanoparticles (MTUF). The obtained magnetic chelating resin was loaded with Ag(I) ions. This material was tested as a disinfectant for water pathogenic microorganism's deactivation. The toxicity of MTUF before and after Ag(I) loading was estimated. The antimicrobial activity tests of MTUF-Ag were carried out against Escherichia coli, Salmonella Typhimurium, and Pseudomonas aeruginosa as examples of Gram-negative bacteria; Listeria monocytogenes, Staphylococcus aureus, Enterococcus faecalis, and Bacillus subtilis as examples of Gram-positive bacteria; and Candida albicans as representative for fungi. The results showed that the minimum inhibitory dosage (MID) of MTF-Ag against Escherichia coli, Salmonella Typhimurium, Listeria monocytogenes, Staphylococcus aureus, and mixed culture were 1.5, 2.0, 1.0, 1.5, and 1.5 mg/mL, respectively, after 40 min of contact time. While C. albicans was more resistant to the magnetic disinfectant, only three log reductions were done at 2.5 mg/mL. The studied MTUF-Ag was successfully tested for water and wastewater pathogenic microorganism's deactivation. It can be concluded that MTUF-Ag could be a good candidate for water disinfection.
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Affiliation(s)
- Khalid Z Elwakeel
- Chemistry Department, Faculty of Science, University of Jeddah, Jeddah, Saudi Arabia.
- Environmental Science Department, Faculty of Science, Port Said University, Port Said, Egypt.
| | - Mohamed Azab El-Liethy
- Environmental Microbiology Lab., Water Pollution Research Department, National Research Centre, P.O. Box 12262, Dokki, Giza, Egypt.
| | - Mohammad S Ahmed
- Water Quality Audit Department, Egyptian Water and Wastewater Regulatory Agency (EWRA), New Cairo, Egypt
| | - Saeid M Ezzat
- Department of Botany, Faculty of Science, Zagazig University, Zagazig, Egypt
| | - Mohamed M Kamel
- Environmental Microbiology Lab., Water Pollution Research Department, National Research Centre, P.O. Box 12262, Dokki, Giza, Egypt
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Naika HR, Lingaraju K, Manjunath K, Kumar D, Nagaraju G, Suresh D, Nagabhushana H. Green synthesis of CuO nanoparticles usingGloriosa superbaL. extract and their antibacterial activity. Journal of Taibah University for Science 2018. [DOI: 10.1016/j.jtusci.2014.04.006] [Citation(s) in RCA: 286] [Impact Index Per Article: 47.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- H. Raja Naika
- Department of Studies and Research in Environmental Science, Tumkur University, Tumkur 572103, Karnataka, India
| | - K. Lingaraju
- Department of Studies and Research in Environmental Science, Tumkur University, Tumkur 572103, Karnataka, India
| | - K. Manjunath
- Centre for Nano and Material Sciences, Jain University, Bangalore 562112, Karnataka, India
| | - Danith Kumar
- Department of Chemsitry, BMS Institute of Technology, Avalahalli, Bangalore 562164, Karnataka, India
| | - G. Nagaraju
- Department of Chemsitry, BMS Institute of Technology, Avalahalli, Bangalore 562164, Karnataka, India
| | - D. Suresh
- Department of Studies and Research in Chemistry, Tumkur University, Tumkur 572103, Karnataka, India
| | - H. Nagabhushana
- Prof. CNR Rao Center for Advanced Materials, Tumkur University, Tumkur 572103, Karnataka, India
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14
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Venkatesh V, Kumaran MDB, Saravanan RK, Kalaichelvan PT, Verma S. Luminescent Silver-Purine Double Helicate: Synthesis, Self-Assembly and Antibacterial Action. Chempluschem 2016; 81:1266-1271. [PMID: 31964074 DOI: 10.1002/cplu.201600293] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Revised: 06/27/2016] [Accepted: 07/21/2016] [Indexed: 12/22/2022]
Abstract
The synthesis, self-assembly and antibacterial activity of a luminescent silver-purine double helicate is reported. The structure of the newly synthesized silver-supported helicate [C36 H24 N16 O4 Cl5 Ag1 ] was unambiguously characterized by single-crystal X-ray crystallography. It exhibited a bright bluish-green emission (λmax =460 nm), when excited with 380 nm light. Microscopic investigations showed that the complex has a propensity to self-assemble into nanospheres. The antibacterial activity of this silver-containing helicate was studied against both Gram-positive and Gram-negative bacteria. MIC (minimal inhibitory concentration) values showed that the complex is very active against Gram-negative bacteria. Further internalization of the silver complex into E. coli bacteria was mapped with the help of microscopic techniques. These results are significant as silver was recently found to enhance antibiotic action against Gram-negative bacteria, raising hope in countering severe bacterial infections.
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Affiliation(s)
- V Venkatesh
- Department of Chemistry, Center for Environmental Science and Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, UP, India.,Department of Chemistry, University of Warwick, Coventry, CV4 7AL, UK
| | - M D Bala Kumaran
- Centre for Advanced Studies in Botany, Guindy Campus, University of Madras, Chennai, 600025, TN, India.,Deapartment of Biotechnology, D. G. Vaishnav College, Chennai, 600106, TN, India
| | - R Kamal Saravanan
- Department of Chemistry, Center for Environmental Science and Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, UP, India
| | - P T Kalaichelvan
- Centre for Advanced Studies in Botany, Guindy Campus, University of Madras, Chennai, 600025, TN, India
| | - Sandeep Verma
- Department of Chemistry, Center for Environmental Science and Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, UP, India
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15
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Wei YS, Chen KS, Wu LT. In situ synthesis of high swell ratio polyacrylic acid/silver nanocomposite hydrogels and their antimicrobial properties. J Inorg Biochem 2016; 164:17-25. [PMID: 27968959 DOI: 10.1016/j.jinorgbio.2016.08.007] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Revised: 08/05/2016] [Accepted: 08/22/2016] [Indexed: 11/23/2022]
Abstract
Silver nanocomposites embedded within a polymer matrix have attracted attention in recent years. Ionic polymer hydrogels comprise networks of chemically or physically cross-linked polymers that swell considerably in an appropriate solvent. In this study, we used a solution of the carboxylic monomer acrylic acid and silver nitrate to prepare nanocomposite hydrogels through ultraviolet (UV)-light irradiation. Silver-impregnated biomaterial composed of acrylic acid contains only a monomer and no cross-linker. The formation of hydrogels and reduction of silver nanoparticles were affected by the preparation parameters, that is, the monomer concentration and silver nitrate concentration. The morphology, structure, and size of the silver nanocomposite hydrogels were evaluated through field emission scanning electron microscopy and UV-visible absorption. The antimicrobial activity of the samples was tested against fourstandard strains Candida albicans, Staphylococcus aureus, Pseudomonas aeruginosa, and Escherichia coli; and five clinical bacterial isolates Staphylococcus aureus, Staphylococcus epidermidis, Pseudomonas aeruginosa, Acinetobacter baumannii, Klebsiella pneumonia. The silver nanocomposite hydrogels exhibited an interconnected porous structure and could absorb 400 to 550g of deionized water per gram of dried hydrogel. Moreover, these hydrogels produced a strong antibacterial effect, which can be useful in developing new superabsorbent antimicrobial pharmaceutical products.
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Abstract
Availability of safe drinking water, a vital natural resource, is still a distant dream to many around the world, especially in developing countries. Increasing human activity and industrialization have led to a wide range of physical, chemical, and biological pollutants entering water bodies and affecting human lives. Efforts to develop efficient, economical, and technologically sound methods to produce clean water for developing countries have increased worldwide. We focus on solar disinfection, filtration, hybrid filtration methods, treatment of harvested rainwater, herbal water disinfection, and arsenic removal technologies. Simple, yet innovative water treatment devices ranging from use of plant xylem as filters, terafilters, and hand pumps to tippy taps designed indigenously are methods mentioned here. By describing the technical aspects of major water disinfection methods relevant for developing countries on medium to small scales and emphasizing their merits, demerits, economics, and scalability, we highlight the current scenario and pave the way for further research and development and scaling up of these processes. This review focuses on clean drinking water, especially for rural populations in developing countries. It describes various water disinfection techniques that are not only economically viable and energy efficient but also employ simple methodologies that are effective in reducing the physical, chemical, and biological pollutants found in drinking water to acceptable limits.
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Affiliation(s)
- Aniruddha B Pandit
- Department of Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai 400019, India;
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Wu Y, Quan X, Si X, Wang X. A small molecule norspermidine in combination with silver ion enhances dispersal and disinfection of multi-species wastewater biofilms. Appl Microbiol Biotechnol 2016; 100:5619-29. [DOI: 10.1007/s00253-016-7394-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Revised: 01/26/2016] [Accepted: 02/11/2016] [Indexed: 01/08/2023]
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Marchetti F, Palmucci J, Pettinari C, Pettinari R, Condello F, Ferraro S, Marangoni M, Crispini A, Scuri S, Grappasonni I, Cocchioni M, Nabissi M, Chierotti MR, Gobetto R. Novel composite plastics containing silver(I) acylpyrazolonato additives display potent antimicrobial activity by contact. Chemistry 2014; 21:836-50. [PMID: 25358838 DOI: 10.1002/chem.201404812] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Indexed: 12/20/2022]
Abstract
New silver(I) acylpyrazolonato derivatives displaying a mononuclear, polynuclear, or ionic nature, as a function of the ancillary azole ligands used in the synthesis, have been fully characterized by thermal analysis, solution NMR spectroscopy, solid-state IR and NMR spectroscopies, and X-ray diffraction techniques. These derivatives have been embedded in polyethylene (PE) matrix, and the antimicrobial activity of the composite materials has been tested against three bacterial strains (E. coli, P. aeruginosa, and S. aureus): Most of the composites show antimicrobial action comparable to PE embedded with AgNO3 . Tests by contact and release tests for specific migration of silver from PE composites clearly indicate that, at least in the case of the PE, for composites containing polynuclear silver(I) additives, the antimicrobial action is exerted by contact, without release of silver ions. Moreover, PE composites can be re-used several times, displaying the same antimicrobial activity. Membrane permeabilization studies and induced reactive oxygen species (ROS) generation tests confirm the disorganization of bacterial cell membranes. The cytotoxic effect, evaluated in CD34(+) cells by MTT (3-(4,5-dimethylthiazole-2-yl)-2,5-diphenyltetrazoliumbromide) and CFU (colony forming units) assays, indicates that the PE composites do not induce cytotoxicity in human cells. Studies of ecotoxicity, based on the test of Daphnia magna, confirm tolerability of the PE composites by higher organisms and exclude the release of Ag(+) ions in sufficient amounts to affect water environment.
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Affiliation(s)
- Fabio Marchetti
- School of Science and Technology, Chemistry Section, University of Camerino, Via S. Agostino 1, Camerino (MC) (Italy).
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Amin MT, Nawaz M, Amin MN, Han M. Solar disinfection of Pseudomonas aeruginosa in harvested rainwater: a step towards potability of rainwater. PLoS One 2014; 9:e90743. [PMID: 24595188 PMCID: PMC3940928 DOI: 10.1371/journal.pone.0090743] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2013] [Accepted: 02/05/2014] [Indexed: 11/21/2022] Open
Abstract
Efficiency of solar based disinfection of Pseudomonas aeruginosa (P. aeruginosa) in rooftop harvested rainwater was evaluated aiming the potability of rainwater. The rainwater samples were exposed to direct sunlight for about 8–9 hours and the effects of water temperature (°C), sunlight irradiance (W/m2), different rear surfaces of polyethylene terephthalate bottles, variable microbial concentrations, pH and turbidity were observed on P. aeruginosa inactivation at different weathers. In simple solar disinfection (SODIS), the complete inactivation of P. aeruginosa was obtained only under sunny weather conditions (>50°C and >700 W/m2) with absorptive rear surface. Solar collector disinfection (SOCODIS) system, used to improve the efficiency of simple SODIS under mild and weak weather, completely inactivated the P. aeruginosa by enhancing the disinfection efficiency of about 20% only at mild weather. Both SODIS and SOCODIS systems, however, were found inefficient at weak weather. Different initial concentrations of P. aeruginosa and/or Escherichia coli had little effects on the disinfection efficiency except for the SODIS with highest initial concentrations. The inactivation of P. aeruginosa increased by about 10–15% by lowering the initial pH values from 10 to 3. A high initial turbidity, adjusted by adding kaolin, adversely affected the efficiency of both systems and a decrease, about 15–25%; in inactivation of P. aeruginosa was observed. The kinetics of this study was investigated by Geeraerd Model for highlighting the best disinfection system based on reaction rate constant. The unique detailed investigation of P. aeruginosa disinfection with sunlight based disinfection systems under different weather conditions and variable parameters will help researchers to understand and further improve the newly invented SOCODIS system.
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Affiliation(s)
- Muhammad T. Amin
- Alamoudi Water Research Chair, King Saud University, Riyadh, Kingdom of Saudi Arabia
- * E-mail:
| | - Mohsin Nawaz
- Alamoudi Water Research Chair, King Saud University, Riyadh, Kingdom of Saudi Arabia
| | - Muhammad N. Amin
- Department of Civil and Environmental Engineering, College of Engineering, King Faisal University, Al-Hofuf Al-Ahsa, Kingdom of Saudi Arabia
| | - Mooyoung Han
- Civil and Environmental Engineering Department, Seoul National University, Shinrimdong, KwanakGu, Seoul, South Korea
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Lalley J, Dionysiou DD, Varma RS, Shankara S, Yang DJ, Nadagouda MN. Silver-based antibacterial surfaces for drinking water disinfection—an overview. Curr Opin Chem Eng 2014. [DOI: 10.1016/j.coche.2013.09.004] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Pandiyarajan T, Udayabhaskar R, Vignesh S, James RA, Karthikeyan B. Synthesis and concentration dependent antibacterial activities of CuO nanoflakes. Mater Sci Eng C Mater Biol Appl 2013; 33:2020-4. [PMID: 23498227 DOI: 10.1016/j.msec.2013.01.021] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2012] [Revised: 11/24/2012] [Accepted: 01/11/2013] [Indexed: 10/27/2022]
Abstract
We report, synthesis and antibacterial activities of CuO nanoflakes. CuO nanoparticles are prepared at room temperature through sol-gel method. X-ray diffraction studies show the particles are monoclinic (crystalline) in nature. Scanning electron microscopy (SEM) images clearly show that the prepared particles are flake like in structure. Fourier transform infrared (FTIR) spectra exhibits three different bands that correspond to the Au and Bu modes. Antibacterial studies were performed on Shigella flexneri, Staphylococcus aureus, Staphylococcus epidermidis, Salmonella typhimurium, Bacillus subtilis, Escherichia coli, Vibrio cholera, Pseudomonas aeruginosa and Aeromonas liquefaciens bacterial strains. Among these bacterial strains, S. flexneri and B. subtilis are most sensitive to copper oxide nanoparticles than the positive control (Penicillin G) and S. typhimurium strain shows the less sensitive. Results show that sensitivity is highly dependent on the concentrations of CuO nanoflakes.
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Affiliation(s)
- T Pandiyarajan
- Department of Physics, National Institute of Technology, Tiruchirappalli 620 015, India
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Tăbăcaru A, Pettinari C, Marchetti F, di Nicola C, Domasevitch KV, Galli S, Masciocchi N, Scuri S, Grappasonni I, Cocchioni M. Antibacterial action of 4,4'-bipyrazolyl-based silver(I) coordination polymers embedded in PE disks. Inorg Chem 2012; 51:9775-88. [PMID: 22921278 DOI: 10.1021/ic3011635] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Coupling the rigid spacer 4,4'-bipyrazole (H(2)BPZ), in its anionic or neutral form, to different silver(I) salts allowed isolation of the novel coordination polymers [Ag(2)(BPZ)] (1) and [Ag(H(2)BPZ)(X)] (X = NO(3), 2; ClO(4), 3; BF(4), 4; PF(6), 5; CH(3)SO(3), 6; CF(3)SO(3), 7), which were fully characterized by infrared and emission spectroscopies, thermal analysis, and X-ray powder diffraction. The crystal structure of 1 consists of 2-D layers containing 1-D chains of Ag(I) ions bridged by exo-tetradentate bipyrazolato moieties. The crystal structures of the [Ag(H(2)BPZ)(X)] species 2-7 feature 1-D chains of [Ag(H(2)BPZ)] stoichiometry, along which the metal centers are bridged by exo-bidentate bipyrazolyl spacers. Contacts among adjacent chains are mediated by the counterions through nonbonding interactions involving the Ag(I) ions and the pyrazolyl N-H groups. Thermogravimetric analyses disclosed the good thermal stability of these materials, decomposing in the range 200-300 °C. Under UV irradiation at room temperature, all the species showed a yellow-green emission centered in the range 520-522 nm. When embedded into polyethylene disks, 1, 2, and 4-7 demonstrated their activity as topical antibacterial agents against suspensions of E. coli, P. aeruginosa, and S. aureus: complete reduction of the three bacterial strains was achieved in 24 h, reduction of S. aureus reaching ca. 90% in only 2 h. Biocidal action was expressed also by contact susceptibility tests.
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Affiliation(s)
- Aurel Tăbăcaru
- Scuola di Scienze del Farmaco e dei Prodotti della Salute, Divisione di Chimica, Università degli Studi di Camerino, Via S. Agostino 1, 62032 Camerino (MC), Italy
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