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Nti EK, Cobbina SJ, Attafuah EE, Senanu LD, Amenyeku G, Gyan MA, Forson D, Safo AR. Water pollution control and revitalization using advanced technologies: Uncovering artificial intelligence options towards environmental health protection, sustainability and water security. Heliyon 2023; 9:e18170. [PMID: 37496916 PMCID: PMC10367323 DOI: 10.1016/j.heliyon.2023.e18170] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 07/08/2023] [Accepted: 07/10/2023] [Indexed: 07/28/2023] Open
Abstract
In Ghana, illegal mining (galamsey) activities have polluted most of the river bodies. For example, water bodies in Ghana that are polluted amounts to 60% with most of them in deteriorating condition. However, to live a sustainable life, there is the need to follow rules of environmental management, where pollution control and advanced treatment technologies are imperative. The adoption of control strategies and advanced technologies in galamsey-affected-water basins in Ghana will help provide real-time revitalization for supply of quality water. The control strategies for water pollution management and advanced technologies would particularly help utility companies in ensuring that all Ghanaians continue to get potable, reliable, and sustainable water supplies for the current and future generations. The paper covers three key control strategies for water pollution management, vis-à-vis six major aspects of advanced technologies and the use of artificial intelligence (AI). AI based decision-making tools help optimize the use of various treatment technologies, such as adsorption, ion exchanges, electrokinetic processes, chemical precipitation, phytobial remediation, and membrane technology to effectively remove pollutants from affected water bodies. The paper also focuses on advantages and disadvantages of several advanced technologies, challenges on leveraging the technologies while identifying gaps, and possible technology roadmap. The review contributes to water quality issues in Ghana's Pra river basin by embracing AI and other cutting-edge technologies to address the current water pollution crisis and also ensure sustainable and secure water supply for future generations. This contribution is in line with the United Nations' Agenda 2030 Sustainable Development Goals' (SDGs) goal 6 (clean water and sanitation) and goal 3 (good health and well-being).
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Affiliation(s)
- Emmanuel Kwame Nti
- West African Centre for Water, Irrigation and Sustainable Agriculture (WACWISA) Government of Ghana and World Bank Through the African Centre's of Excellence for Development Impact (ACE Impact) Initiative, University for Development Studies (UDS), Nyankpala Campus, Tamale, Ghana
- Department of Environment and Sustainability Sciences, Faculty of Natural Resources and Environment, University for Development Studies (UDS), Nyankpala Campus, Tamale, Ghana
| | - Samuel Jerry Cobbina
- Department of Environment and Sustainability Sciences, Faculty of Natural Resources and Environment, University for Development Studies (UDS), Nyankpala Campus, Tamale, Ghana
| | - Eunice Efua Attafuah
- Regional Water and Environmental Sanitation Centre Kumasi (RWESCK) World Bank Africa Centre's of Excellence Project, Department of Civil Engineering, Kwame Nkrumah University of Science and Technology (KNUST), Kumasi, Ghana
| | - Lydia Dziedzorm Senanu
- West African Centre for Water, Irrigation and Sustainable Agriculture (WACWISA) Government of Ghana and World Bank Through the African Centre's of Excellence for Development Impact (ACE Impact) Initiative, University for Development Studies (UDS), Nyankpala Campus, Tamale, Ghana
- Department of Environment and Sustainability Sciences, Faculty of Natural Resources and Environment, University for Development Studies (UDS), Nyankpala Campus, Tamale, Ghana
| | - Gloria Amenyeku
- West African Centre for Water, Irrigation and Sustainable Agriculture (WACWISA) Government of Ghana and World Bank Through the African Centre's of Excellence for Development Impact (ACE Impact) Initiative, University for Development Studies (UDS), Nyankpala Campus, Tamale, Ghana
- Department of Environment and Sustainability Sciences, Faculty of Natural Resources and Environment, University for Development Studies (UDS), Nyankpala Campus, Tamale, Ghana
| | | | - Dorcas Forson
- Department of Integrated Science Education, University of Education, Winneba, Ghana
| | - Abdul-Rafiw Safo
- Department of Geography and Rural Development, Kwame Nkrumah University of Science and Technology (KNUST), Kumasi, Ghana
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Kilic T, Bali EB. Biofilm control strategies in the light of biofilm-forming microorganisms. World J Microbiol Biotechnol 2023; 39:131. [PMID: 36959476 DOI: 10.1007/s11274-023-03584-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Accepted: 03/15/2023] [Indexed: 03/25/2023]
Abstract
Biofilm is a complex consortium of microorganisms attached to biotic or abiotic surfaces and live in self-produced or acquired extracellular polymeric substances (EPSs). EPSs are mainly formed by lipids, polysaccharides, proteins, and extracellular DNAs. The adherence to the surface of microbial communities is seen in food, medical, dental, industrial, and environmental fields. Biofilm development in food processing areas challenges food hygiene, and human health. In addition, bacterial attachment and biofilm formation on medical implants inside human tissue can cause multiple critical chronic infections. More than 30 years of international research on the mechanisms of biofilm formation have been underway to address concerns about bacterial biofilm infections. Antibiofilm strategies contain cold atmospheric plasma, nanotechnological, phage-based, antimicrobial peptides, and quorum sensing inhibition. In the last years, the studies on environmentally-friendly techniques such as essential oils and bacteriophages have been intensified to reduce microbial growth. However, the mechanisms of the biofilm matrix formation are still unclear. This review aims to discuss the latest antibiofilm therapeutic strategies against biofilm-forming bacteria.
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Affiliation(s)
- Tugba Kilic
- Department of Medical Services and Techniques, Program of Medical Laboratory Techniques, Vocational School of Health Services, Gazi University, Ankara, 06830, Turkey.
| | - Elif Burcu Bali
- Department of Medical Services and Techniques, Program of Medical Laboratory Techniques, Vocational School of Health Services, Gazi University, Ankara, 06830, Turkey
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Tao J, Yan S, Wang H, Zhao L, Zhu H, Wen Z. Antimicrobial and antibiofilm effects of total flavonoids from Potentilla kleiniana Wight et Arn on Pseudomonas aeruginosa and its potential application to stainless steel surfaces. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2021.112631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Tao J, Yan S, Zhou C, Liu Q, Zhu H, Wen Z. Total flavonoids from Potentilla kleiniana Wight et Arn inhibits biofilm formation and virulence factors production in methicillin-resistant Staphylococcus aureus (MRSA). JOURNAL OF ETHNOPHARMACOLOGY 2021; 279:114383. [PMID: 34214645 DOI: 10.1016/j.jep.2021.114383] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 06/22/2021] [Accepted: 06/28/2021] [Indexed: 06/13/2023]
Abstract
ETHANOPHARMACOLOGICAL RELEVANCE Potentilla kleiniana Wight et Arn is a wide-spread wild plant in the mountainous areas in southern China. The whole herb has been used as a traditional herbal medicine to treat fever, arthritis, malaria, insect and snake bites, hepatitis, and traumatic injury. In vitro studies have reported the antibacterial activity use of the plant in traditional medicinal systems. AIM OF THE STUDY The aim of this study was to investigate the inhibitory activity of total flavonoid from Potentilla kleiniana Wight et Arn (TFP) on methicillin-resistant Staphylococcus aureus (MRSA) in planktonic state and biofilm state. MATERIALS AND METHODS Antibacterial activities of TFP on planktonic MRSA were determined by agar diffusion method, microtiter plate assay and time-kill curve assay. Electrical conductivity, membrane permeability, membrane potential and autoaggregation were analyzed to study TFP effects on planktonic MRSA growth. Crystal violet (CV) staining and confocal laser scanning microscopy (CLSM) were analyzed to study TFP effects on aggregation and maturation of MRSA biofilm. After TFP treatment, extracellular polymeric substances (EPS) production were examined. Morphological changes in planktonic and MRSA biofilm following TFP treatment were determined with scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Moreover, α-Toxin protein expression and adhesion-related gene expression were also determined. RESULTS The minimum inhibitory concentration (MIC) of TFP against MRSA was 20 μg/mL. The agar diffusion method and time-kill curve assay results indicated that TFP inhibited planktonic MRSA growth. TFP treatment significantly inhibited planktonic MRSA growth by inhibiting autoaggregation, α-hemolysin activity, α-Toxin protein expression, but increasing electrolyte leakage, membrane permeability and membrane potential and impacting cell structure. Moreover, TFP treatment significantly inhibited aggregation and maturation on MRSA biofilm by decreasing surface hydrophobicity, EPS production and adhesion-related gene expression. CONCLUSION The results of this trial provide scientific experimental data on the traditional use of Potentilla Kleiniana Wight et Arn for traumatic injury treatment and further demonstrate the potential of TFP to be developed as a novel anti-biofilm drug.
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Affiliation(s)
- Junyu Tao
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, 518000, China; Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, 518000, China; School of Food Engineering and Biotechnology, Hanshan Normal University, Chaozhou, 521041, China
| | - Shilun Yan
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, 518000, China; Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, 518000, China; School of Food Engineering and Biotechnology, Hanshan Normal University, Chaozhou, 521041, China
| | - Chuyue Zhou
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, 518000, China
| | - Qiong Liu
- College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, 518000, China
| | - Hui Zhu
- School of Food Engineering and Biotechnology, Hanshan Normal University, Chaozhou, 521041, China
| | - Zhen Wen
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, 518000, China; School of Food Engineering and Biotechnology, Hanshan Normal University, Chaozhou, 521041, China.
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Curtolo G, Araújo JDP, Lima JA, Brandt JV, Bittencourt JVS, Venturini LM, Silveira PCL, Rogers S, Franzini CM, de Goes VFF, Andrade TAM. Silver nanoparticles formulations for healing traumatic injuries in oral mucosa of rats. Arch Oral Biol 2021; 129:105202. [PMID: 34214784 DOI: 10.1016/j.archoralbio.2021.105202] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Revised: 06/23/2021] [Accepted: 06/24/2021] [Indexed: 01/13/2023]
Abstract
OBJECTIVE To evaluate formulations of 1 % silver (Ag) nanoparticles for treating traumatic lesions induced in the oral mucosa of rats, because these lesions are commonly observed in the dental clinic, and their therapeutic forms are scarce. METHODS Wistar rats were punch-injured (two circular fragments, 4.0 mm in diameter) in the oral mucosa (one on each side), and were treated topically (twice per week) with the treatments/groups including: no injury, control, vehicle, diluted Ag, soluble Ag, and solid Ag. On the 2nd, 7th, and 14th days postinjury, biopsies were collected for immunohistochemistry and biochemical analysis. RESULTS The group diluted Ag revealed a higher level of inflammatory infiltrate on the 2nd day, whereas solid Ag presented lower levels. The Ag solid group presented higher IL-1β on the 2nd day and increased IL-10 and TGF-β1 throughout the follow-up. Moreover, all three Ag groups presented lower levels of oxidative stress markers and, on the 7th day, the diluted Ag and solid Ag groups revealed higher antioxidants. Diluted Ag and soluble Ag groups presented greater blood vessels proliferation, whereas soluble Ag and solid Ag groups revealed greater VEGF on the 2nd and 14th days. Furthermore, all three Ag groups were highlighted during fibroplasia, although collagenesis was similar to that observed in the control group. CONCLUSIONS Although diluted Ag was noticeable for its important angiogenesis and fibroplasia, solid Ag was the most suitable formulation in healing oral lesions as it efficiently controlled inflammation and oxidative stress, thus favoring angiogenesis and tissue formation.
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Affiliation(s)
- Gabriella Curtolo
- Graduate Program in Biomedical Sciences, University Center of Herminio Ometto Foundation - FHO, Dr. Maximiliano Baruto Ave, 500. Jardim Universitario, 13607-339, Araras, Sao Paulo, Brazil
| | - Jaqueline de Paula Araújo
- Graduate Program in Biomedical Sciences, University Center of Herminio Ometto Foundation - FHO, Dr. Maximiliano Baruto Ave, 500. Jardim Universitario, 13607-339, Araras, Sao Paulo, Brazil
| | - Joyce Alessandra Lima
- Graduate Program in Biomedical Sciences, University Center of Herminio Ometto Foundation - FHO, Dr. Maximiliano Baruto Ave, 500. Jardim Universitario, 13607-339, Araras, Sao Paulo, Brazil
| | - João Victor Brandt
- Laboratory of Magnetic Materials and Colloids, Department of Physical Chemistry, Institute of Chemistry, Sao Paulo State University (UNESP), Prof. Francisco Degni Ave, 55. Jardim Quitandinha, 14800-900, Araraquara, SP, Brazil
| | - João Vitor Silvano Bittencourt
- Laboratory of Experimental Physiopathology, Graduate Program in Science of Health, Universidade do Extremo Sul Catarinense - UNESC, Universitaria Ave, 1105. Universitario, Bloco S - Room 017, 88806-000, Criciuma, Santa Catarina, Brazil
| | - Ligia Milanez Venturini
- Laboratory of Experimental Physiopathology, Graduate Program in Science of Health, Universidade do Extremo Sul Catarinense - UNESC, Universitaria Ave, 1105. Universitario, Bloco S - Room 017, 88806-000, Criciuma, Santa Catarina, Brazil
| | - Paulo Cesar Lock Silveira
- Laboratory of Experimental Physiopathology, Graduate Program in Science of Health, Universidade do Extremo Sul Catarinense - UNESC, Universitaria Ave, 1105. Universitario, Bloco S - Room 017, 88806-000, Criciuma, Santa Catarina, Brazil
| | - Sylvia Rogers
- Graduate Program in Odontology, University Center of Herminio Ometto Foundation - FHO, Dr. Maximiliano Baruto Ave, 500. Jardim Universitario, 13607-339, Araras, Sao Paulo, Brazil
| | - Cristina Maria Franzini
- Graduate Program in Odontology, University Center of Herminio Ometto Foundation - FHO, Dr. Maximiliano Baruto Ave, 500. Jardim Universitario, 13607-339, Araras, Sao Paulo, Brazil
| | - Vivian Fernandes Furletti de Goes
- Graduate Program in Odontology, University Center of Herminio Ometto Foundation - FHO, Dr. Maximiliano Baruto Ave, 500. Jardim Universitario, 13607-339, Araras, Sao Paulo, Brazil
| | - Thiago Antônio Moretti Andrade
- Graduate Program in Biomedical Sciences, University Center of Herminio Ometto Foundation - FHO, Dr. Maximiliano Baruto Ave, 500. Jardim Universitario, 13607-339, Araras, Sao Paulo, Brazil.
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Improved antifouling properties of PVA hydrogel via an organic semiconductor graphitic carbon nitride catalyzed surface-initiated photo atom transfer radical polymerization. Colloids Surf B Biointerfaces 2021; 203:111718. [PMID: 33774491 DOI: 10.1016/j.colsurfb.2021.111718] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 03/14/2021] [Accepted: 03/18/2021] [Indexed: 01/03/2023]
Abstract
An innovative g-C3N4 catalyzed surface-initiated photo atom transfer radical polymerization (SI-photoATRP) has been developed to construct MEDSAH zwitterionic polymer brushes on PVA hydrogel surface. g-C3N4 catalyzed SI-photoATRP is temporal and spatial control. As a heterogeneous reaction system, it can solve the catalyst residues problem. After grafting with MEDSAH, surface chemical composition and morphology of PVA-g-pMEDSAH hydrogel confirmed that MEDSAH was successfully grafted onto PVA hydrogel. Thermal property of PVA-g-pMEDSAH hydrogel decreased and hydrophilicity increased. No statistically significant differences between PVA and PVA-g-pMEDSAH were observed on mechanical properties. Cytotoxicity in vitro of PVA-g-pMEDSAH hydrogel could be considered as no cytotoxicity for L929 and NDHF cells. The antifouling properties of PVA-g-pMEDSAH hydrogel were significantly improved due to the enhancement of the surface hydration and steric repulsion effects caused by pMEDSAH polymer brushes. In addition, g-C3N4 is easier to modify to enhance the photocatalyst property. Thus, the heterogeneous reaction system of g-C3N4 catalyzed SI-photoATRP has huge potential applied in biomaterials surface modification.
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Pejman M, Firouzjaei MD, Aktij SA, Das P, Zolghadr E, Jafarian H, Shamsabadi AA, Elliott M, Esfahani MR, Sangermano M, Sadrzadeh M, Wujcik EK, Rahimpour A, Tiraferri A. Improved antifouling and antibacterial properties of forward osmosis membranes through surface modification with zwitterions and silver-based metal organic frameworks. J Memb Sci 2020. [DOI: 10.1016/j.memsci.2020.118352] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Cui B, Yang Q, Zhang Y, Liu X, Wu W, Li J. Improving nitrogen removal in biological aeration filter for domestic sewage treatment via adjusting microbial community structure. BIORESOURCE TECHNOLOGY 2019; 293:122006. [PMID: 31476564 DOI: 10.1016/j.biortech.2019.122006] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2019] [Revised: 08/09/2019] [Accepted: 08/10/2019] [Indexed: 06/10/2023]
Abstract
The rapid growth of nitrite-oxidizing bacteria (NOB) in reactor prevents the application of anaerobic ammonium oxidation (anammox) technology to main-stream wastewater treatment. How to eliminate NOB and reserve anaerobic ammonium oxidation bacteria (AnAOB) simultaneously becomes the biggest challenge. In this study two coupled biological aeration filters (BAFs) were built up to treat domestic sewage. In BAF1 nitrogen removal concentration was 21.4 mg/L via heterotrophic denitrification pathway. Backwash was conducted to BAF2 to improve nitrogen removal performance. After backwash Nitrospira proportion declined from 10.8% to 2.1%, while Candidatus Kuenenia percentage increased from 5.6% to 10.2%. Nitrogen removal concentration improved from 8.6 mg/L to 22.8 mg/L via anammox pathway in BAF2, and total nitrogen removal concentration reached to 44.2 mg/L in two coupled BAFs during aeration process. These findings could provide a new strategy for the application of anammox technology to main-stream wastewater treatment.
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Affiliation(s)
- Bin Cui
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing 100124, PR China
| | - Qing Yang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing 100124, PR China.
| | - Yanping Zhang
- Key Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry, Beijing Technology and Business University, Beijing 100048, PR China
| | - Xiuhong Liu
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing 100124, PR China
| | - Wenjun Wu
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing 100124, PR China
| | - Jianmin Li
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing 100124, PR China
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Ceramic-Based Composite Membrane with a Porous Network Surface Featuring a Highly Stable Flux for Drinking Water Purification. MEMBRANES 2019; 9:membranes9010005. [PMID: 30609714 PMCID: PMC6359389 DOI: 10.3390/membranes9010005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Revised: 12/19/2018] [Accepted: 12/26/2018] [Indexed: 11/17/2022]
Abstract
Highly efficient drinking water purification is still an important challenge for membrane techniques where high flux, high rejection, and low fouling are highly emphasized. In the present work, a porous network surface with carbon nanotubes (CNTs) was in situ constructed on hierarchically-structured mullite ceramic membranes. Interestingly, such a composite structure was demonstrated to effectively remove bacteria from drinking water with a highly stable long-term flux. After membrane structure characterizations, separation performance, such as flux and rejection, was assessed by the purification of bacteria-contaminated drinking water. The results confirmed that the mullite-CNT composite membrane claimed a complete removal of two model bacteria (100% rejection of Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus)), driven by a trans-membrane pressure of 0.1 MPa, where a surface sieving mechanism was dominant. A highly stable long-term flux for the 24 h filtration process was achieved, which can be attributed to the porous membrane surface with a special randomly-oriented CNTs network structure, featuring very high three-dimensional open porosity, allowing water to rapidly transport. The bacteria were only trapped on the CNTs network surface via surface filtration, without pore plugging, endowing the mullite-CNT membrane with unprecedentedly low fouling propensity to keep high flux with long-term operation time.
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Jing H, Sahle-Demessie E, Sorial GA. Inhibition of biofilm growth on polymer-MWCNTs composites and metal surfaces. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 633:167-178. [PMID: 29573683 DOI: 10.1016/j.scitotenv.2018.03.065] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 03/06/2018] [Accepted: 03/06/2018] [Indexed: 06/08/2023]
Abstract
There is an increased interest in incorporating multi-wall carbon nanotubes (MWCNTs) into polymer matrices to control the adhesion of bacteria to surfaces and the subsequent formation of biofilm growth on the surface of water pipes, food packages, and medical devices. Microbial interactions with carbon nanotube-polymer composites in the environment are not well understood. The growth of Pseudomonas fluorescens (gram-negative) and Mycobacterium smegmatis (gram-positive) biofilms on copper, polyethylene (PE), polyvinyl chloride, and stainless steel was compared with growth on MWCNT-PE composites in order to gain insight into the effect of the surface properties of nanomaterials on the attachment and proliferation of microorganism which could result in the engineering of better, non-fouling materials. A statistical analysis of the biofilm growth showed a significant impact of materials for both P. fluorescens (p < 0.0001) and M. smegmatis (p = 0.00426). Biofilm growth after 56 days on PE compared to biofilm growth on copper surfaces decreased by 46.4% and 34.9% for P. fluorescens and M. smegmatis, respectively. Biofilm growth on PE-multiwall-carbon-nanotubes (MWCNTs)-composites surface compared to PE decreased by 89.3% and 29% for P. fluorescens and M. smegmatis, respectively. Bacterial species (p < 0.0006) and surface roughness (p < 0.0001) were important factors in determining the attachment and initial biofilm growth rate. The interactions between cells and material surface could be attributed to the complicated and collective effect of electrostatic forces, hydrophobic interactions, and hydrogen/covalent bonding. Further study is needed to determine whether or not there is a difference between the cell attachment in the exponential growth phase and the stationary, or decay, phase cells.
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Affiliation(s)
- Hengye Jing
- Department of Chemical and Environmental Engineering, University of Cincinnati, Cincinnati, OH 45221, USA
| | | | - George A Sorial
- Department of Chemical and Environmental Engineering, University of Cincinnati, Cincinnati, OH 45221, USA
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Xia Y, Sun L, Xiao H. Nanoscaled gold and silver: Simultaneous removal and transformation to functional materials. JOURNAL OF HAZARDOUS MATERIALS 2018; 342:741-748. [PMID: 28918292 DOI: 10.1016/j.jhazmat.2017.09.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 08/20/2017] [Accepted: 09/08/2017] [Indexed: 06/07/2023]
Abstract
Based on an "acid-assisted cool welding" technology which was realized by virtue of the freezing process in the presence of acid, nanoscaled gold (Au) and silver (Ag) from wastewater could be removed very facilely and efficiently. The technology was independence of the freezing temperature, size as well as shape of those nanoscaled units. Besides, some functional materials like porous nanostructures with highly and stably catalytic activity could be also obtained during the removal. Our research not only provided a new method to remove nanoscaled Ag or Au from wastewater, but also built up a unique route to transform those nano-units into functional materials simultaneously.
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Affiliation(s)
- Youyi Xia
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan, Anhui 243002, PR China.
| | - Lin Sun
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan, Anhui 243002, PR China
| | - Hongping Xiao
- School of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, PR China.
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Kim WJ, Jeong KO, Kang DH. Inhibition of Initial Attachment of Injured Salmonella Typhimurium onto Abiotic Surfaces. J Food Prot 2018; 81:37-42. [PMID: 29257724 DOI: 10.4315/0362-028x.jfp-17-209] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Following sanitation interventions in food processing facilities, sublethally injured bacterial cells can remain on food contact surfaces. We investigated whether injured Salmonella Typhimurium cells can attach onto abiotic surfaces, which is the initial stage for further biofilm development. We utilized heat, UV, hydrogen peroxide, and lactic acid treatments, which are widely utilized by the food industry. Our results showed that heat, UV, and hydrogen peroxide did not effectively change populations of attached Salmonella Typhimurium. Cells treated with hydrogen peroxide had a slightly higher tendency to adhere to abiotic surfaces, although there was no significant difference between the populations of control and hydrogen peroxide-treated cells. However, lactic acid effectively reduced the number of Salmonella Typhimurium cells attached to stainless steel. We also compared physicochemical changes of Salmonella Typhimurium after application of lactic acid and used hydrogen peroxide as a positive control because only lactic acid showed a decreased tendency for attachment and hydrogen peroxide induced slightly higher numbers of attached bacteria cells. Extracellular polymeric substance produced by Salmonella Typhimurium was not detected in any treatment. Significant differences in hydrophobicity were not observed. Surface charges of cell membranes did not show relevant correlation with numbers of attached cells, whereas autoaggregation showed a positive correlation with attachment to stainless steel. Our results highlight that when lactic acid is applied in a food processing facility, it can effectively interfere with adhesion of injured Salmonella Typhimurium cells onto food contact surfaces.
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Affiliation(s)
- Woo-Ju Kim
- 1 Department of Food and Animal Biotechnology, Department of Agricultural Biotechnology, Center for Food and Bioconvergence, and Research Institute for Agricultural and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea; and
| | - Ki-Ok Jeong
- 1 Department of Food and Animal Biotechnology, Department of Agricultural Biotechnology, Center for Food and Bioconvergence, and Research Institute for Agricultural and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea; and
| | - Dong-Hyun Kang
- 1 Department of Food and Animal Biotechnology, Department of Agricultural Biotechnology, Center for Food and Bioconvergence, and Research Institute for Agricultural and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea; and.,2 Institutes of Green Bio Science and Technology, Seoul National University, Pyeongchang-gun, Gangwon-do, 25354, Republic of Korea
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Xie T, Liao Z, Lei H, Fang X, Wang J, Zhong Q. Antibacterial activity of food-grade chitosan against Vibrio parahaemolyticus biofilms. Microb Pathog 2017; 110:291-297. [DOI: 10.1016/j.micpath.2017.07.011] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Revised: 07/04/2017] [Accepted: 07/10/2017] [Indexed: 01/01/2023]
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Blel W, Limousy L, Dutournié P, Ponche A, Boucher A, Le Fellic M. Study of the antimicrobial and antifouling properties of different oxide surfaces. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:9847-9858. [PMID: 27680001 DOI: 10.1007/s11356-016-7762-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2016] [Accepted: 09/21/2016] [Indexed: 06/06/2023]
Abstract
Membrane separation processes find applications in an array of fields as they use far less energy and chemical agents than competing processes. However, a major drawback of membrane technology is that biofilm formation alters membrane performances. Preventing biofilm formation is thus a pivotal challenge for larger-scale development of membrane processes. Here, we studied the comparative antibacterial activities of different inorganic membranes (ceramic and zeolite-coated ceramic with or without copper exchange) using several bacterial strains (Escherichia coli, Staphylococcus aureus, and Bacillus subtilis). In static conditions, alumina plates coated with Cu-exchanged zeolite showed significant bactericidal activity. In dynamic mode (circulation of a contaminated nutrient medium), there was no observable bacterial adhesion at the surface of the Cu-exchanged material. These results confirm the antifouling properties of the Cu-mordenite layer due to both the increased hydrophilicity and antibacterial properties of the active layer.Tests performed with tubular filtration membranes (without copper exchange) showed a significant decline in membrane hydraulic properties during filtration of culture media containing bacteria, whereas copper-exchanged membranes showed no decline in hydraulic permeability. Filtration tests performed with concentrated culture media containing spores of B. subtilis led to a significant decrease in membrane hydraulic permeabilities (but less so with Cu-exchanged membranes). The surfaces showed less effective global antifouling properties during the filtration of a concentrated culture medium due to competition between bacterial growth and the bactericidal effect of copper. Analyses of copper leached in solution show that after a conditioning step, the amount of copper released is negligible.
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Affiliation(s)
- W Blel
- Laboratoire de Génie des procédés-environnement-agro-alimentaire (GEPEA), UMR CNRS 6144, Université de Nantes, Saint Nazaire, France.
| | - L Limousy
- Institut de Science des Matériaux de Mulhouse (IS2M) UMR CNRS 7361, Université de Strasbourg, Université de Haute Alsace, Mulhouse, France
| | - P Dutournié
- Institut de Science des Matériaux de Mulhouse (IS2M) UMR CNRS 7361, Université de Strasbourg, Université de Haute Alsace, Mulhouse, France
| | - A Ponche
- Institut de Science des Matériaux de Mulhouse (IS2M) UMR CNRS 7361, Université de Strasbourg, Université de Haute Alsace, Mulhouse, France
| | - A Boucher
- Laboratoire d'Ingénierie des MATériaux de Bretagne (LIMATB-EA 4250), Université de Bretagne Sud, Lorient, France
| | - M Le Fellic
- Laboratoire d'Ingénierie des MATériaux de Bretagne (LIMATB-EA 4250), Université de Bretagne Sud, Lorient, France
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15
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Effects of sublethal concentrations of silver nanoparticles onEscherichia coliandBacillus subtilisunder aerobic and anaerobic conditions. Biointerphases 2016; 11:04B308. [DOI: 10.1116/1.4972100] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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16
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Grün AY, Meier J, Metreveli G, Schaumann GE, Manz W. Sublethal concentrations of silver nanoparticles affect the mechanical stability of biofilms. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:24277-24288. [PMID: 27650851 DOI: 10.1007/s11356-016-7691-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Accepted: 09/12/2016] [Indexed: 06/06/2023]
Abstract
Bacterial biofilms are most likely confronted with silver nanoparticles (Ag NPs) as a pollutant stressor in aquatic systems. In this study, biofilms of Aquabacterium citratiphilum were exposed for 20 h to 30 and 70 nm citrate stabilized Ag NPs in low-dose concentrations ranging from 600 to 2400 μg l-1, and the Ag NP-mediated effects on descriptive, structural, and functional biofilm characteristics, including viability, protein content, architecture, and mechanical stability, were investigated. Viability, based on the bacterial cell membrane integrity of A. citratiphilum, as determined by epifluorescence microscopy, remained unaffected after Ag NP exposure. Moreover, in contrast to information in the current literature, protein contents of cells and extracellular polymeric substances (EPS) and biofilm architecture, including dry mass, thickness, and density, were not significantly impacted by exposure to Ag NPs. However, the biofilms themselves served as effective sinks for Ag NPs, exhibiting enrichment factors from 5 to 8. Biofilms showed a greater capacity to accumulate 30 nm sized Ag NPs than 70 nm Ag NPs. Furthermore, Ag NPs significantly threatened the mechanical stability of biofilms, as determined by a newly developed assay. For 30 nm Ag NPs, the mechanical stability of biofilms decreased as the Ag NP concentrations applied to them increased. In contrast, 70 nm Ag NPs produced a similar decrease in mechanical stability for each applied concentration. Overall, this finding demonstrates that exposure to Ag NPs triggers remarkable changes in biofilm adhesion and/or cohesiveness. Because of biofilm-mediated ecological services, this response raises environmental concerns regarding Ag NP release into freshwater systems, even in sublethal concentrations.
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Affiliation(s)
- Alexandra Y Grün
- Institute for Integrated Natural Sciences, University of Koblenz-Landau, Universitätsstr. 1, 56070, Koblenz, Germany.
| | - Jutta Meier
- Institute for Integrated Natural Sciences, University of Koblenz-Landau, Universitätsstr. 1, 56070, Koblenz, Germany
| | - George Metreveli
- Institute for Environmental Sciences, Group of Environmental and Soil Chemistry, University of Koblenz-Landau, Fortstr. 7, 76829, Landau, Germany
| | - Gabriele E Schaumann
- Institute for Environmental Sciences, Group of Environmental and Soil Chemistry, University of Koblenz-Landau, Fortstr. 7, 76829, Landau, Germany
| | - Werner Manz
- Institute for Integrated Natural Sciences, University of Koblenz-Landau, Universitätsstr. 1, 56070, Koblenz, Germany
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Yang JL, Li YF, Liang X, Guo XP, Ding DW, Zhang D, Zhou S, Bao WY, Bellou N, Dobretsov S. Silver Nanoparticles Impact Biofilm Communities and Mussel Settlement. Sci Rep 2016; 6:37406. [PMID: 27869180 PMCID: PMC5116650 DOI: 10.1038/srep37406] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Accepted: 10/28/2016] [Indexed: 02/07/2023] Open
Abstract
Silver nanoparticles (AgNPs) demonstrating good antimicrobial activity are widely used in many fields. However, the impact of AgNPs on the community structures of marine biofilms that drive biogeochemical cycling processes and the recruitment of marine invertebrate larvae remains unknown. Here, we employed MiSeq sequencing technology to evaluate the bacterial communities of 28-day-old marine biofilms formed on glass, polydimethylsiloxane (PDMS), and PDMS filled with AgNPs and subsequently tested the influence of these marine biofilms on plantigrade settlement by the mussel Mytilus coruscus. AgNP-filled PDMS significantly reduced the dry weight and bacterial density of biofilms compared with the glass and PDMS controls. AgNP incorporation impacted bacterial communities by reducing the relative abundance of Flavobacteriaceae (phylum: Bacteroidetes) and increasing the relative abundance of Vibrionaceae (phylum: Proteobacteria) in 28-day-old biofilms compared to PDMS. The settlement rate of M. coruscus on 28-day-old biofilms developed on AgNPs was lower by >30% compared to settlement on control biofilms. Thus, the incorporation of AgNPs influences biofilm bacterial communities in the marine environment and subsequently inhibits mussel settlement.
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Affiliation(s)
- Jin-Long Yang
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Shanghai Ocean University, Ministry of Education, China.,Marine Ecology Research Center, The First Institute of Oceanography, State Oceanic Administration, Qingdao, China.,Collaborative Innovation Center for Zhejiang Marine High-efficiency and Healthy Aquaculture, Ningbo, China
| | - Yi-Feng Li
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Shanghai Ocean University, Ministry of Education, China
| | - Xiao Liang
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Shanghai Ocean University, Ministry of Education, China
| | - Xing-Pan Guo
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Shanghai Ocean University, Ministry of Education, China
| | - De-Wen Ding
- Marine Ecology Research Center, The First Institute of Oceanography, State Oceanic Administration, Qingdao, China
| | - Demin Zhang
- Collaborative Innovation Center for Zhejiang Marine High-efficiency and Healthy Aquaculture, Ningbo, China
| | - Shuxue Zhou
- Department of Materials Science, State Key Laboratory of Molecular Engineering of Polymers, Advanced Coatings Research Center of Ministry of Education of China, Fudan University, Shanghai, China
| | - Wei-Yang Bao
- Institute of Marine Science and Technology, Yangzhou University, Yangzhou, China
| | - Nikoleta Bellou
- Hellenic Centre for Marine Research, Institute of Oceanography, Athens, Greece
| | - Sergey Dobretsov
- Department of Marine Science and Fisheries, College of Agricultural and Marine Sciences, Sultan Qaboos University, Muscat, Oman.,Center of Excellence in Marine Biotechnology, Sultan Qaboos University, Muscat, Oman
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18
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Walden C, Zhang W. Biofilms Versus Activated Sludge: Considerations in Metal and Metal Oxide Nanoparticle Removal from Wastewater. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:8417-8431. [PMID: 27437755 DOI: 10.1021/acs.est.6b01282] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The increasing application of metal and metal oxide nanoparticles [Me(O)NPs] in consumer products has led to a growth in concentration of these nanoparticles in wastewater as emerging contaminants. This may pose a threat to ecological communities (e.g., biological nutrient removal units) within treatment plants and those subject to wastewater effluents. Here, the toxicity, fate, and process implications of Me(O)NPs within wastewater treatment, specifically during activated sludge processing and biofilm systems are reviewed and compared. Research showed activated sludge achieves high removal rate of Me(O)NPs by the formation of aggregates through adsorption. However, recent literature reveals evidence that inhibition is likely for nutrient removal capabilities such as nitrification. Biofilm systems were much less studied, but show potential to resist Me(O)NP inhibition and achieve removal through possible retention by sorption. Implicating factors during bacteria-Me(O)NP interactions such as aggregation, surface functionalization, and the presence of organics are summarized. At current modeled levels, neither activated sludge nor biofilm systems can achieve complete removal of Me(O)NPs, thus allowing for long-term environmental exposure of diverse biological communities to Me(O)NPs in streams receiving wastewater effluents. Future research directions are identified throughout in order to minimize the impact of these nanoparticles released.
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Affiliation(s)
- Connie Walden
- Graduate Research Assistant, Department of Civil Engineering, University of Arkansas , Fayetteville, Arkansas 72701, United States
| | - Wen Zhang
- Assistant Professor, Department of Civil Engineering, University of Arkansas , Fayetteville, Arkansas 72701, United States
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Mallevre F, Fernandes TF, Aspray TJ. Pseudomonas putida biofilm dynamics following a single pulse of silver nanoparticles. CHEMOSPHERE 2016; 153:356-364. [PMID: 27031799 DOI: 10.1016/j.chemosphere.2016.03.060] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Revised: 01/22/2016] [Accepted: 03/14/2016] [Indexed: 06/05/2023]
Abstract
Pseudomonas putida mono-species biofilms were exposed to silver nanoparticles (Ag NPs) in artificial wastewater (AW) under hydrodynamic conditions. Specifically, 48 h old biofilms received a single pulse of Ag NPs at 0, 0.01, 0.1, 1, 10 and 100 mg L(-1) for 24 h in confocal laser scanning microscopy (CLSM) compatible flow-cells. The biofilm dynamics (in terms of morphology, viability and activity) were characterised at 48, 72 and 96 h. Consistent patterns were found across flow-cells and experiments at 48 h. Dose dependent impacts of NPs were then shown at 72 h on biofilm morphology (e.g. biomass, surface area and roughness) from 0.01 mg L(-1). The microbial viability was not altered below 10 mg L(-1) Ag NPs. The activity (based on the d-glucose utilisation) was impacted by concentrations of Ag NPs equal and superior to 10 mg L(-1). Partial recovery of morphology, viability and activity were finally observed at 96 h. Comparatively, exposure to Ag salt resulted in ca. one order of magnitude higher toxicity when compared to Ag NPs. Consequently, the use of a continuous culture system and incorporation of a recovery stage extends the value of biofilm assays beyond the standard acute toxicity assessment.
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Affiliation(s)
- Florian Mallevre
- School of Life Sciences, NanoSafety Research Group, Heriot-Watt University, Edinburgh EH14 4AS, Scotland, UK
| | - Teresa F Fernandes
- School of Life Sciences, NanoSafety Research Group, Heriot-Watt University, Edinburgh EH14 4AS, Scotland, UK
| | - Thomas J Aspray
- School of Life Sciences, NanoSafety Research Group, Heriot-Watt University, Edinburgh EH14 4AS, Scotland, UK.
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20
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Schaumann GE, Philippe A, Bundschuh M, Metreveli G, Klitzke S, Rakcheev D, Grün A, Kumahor SK, Kühn M, Baumann T, Lang F, Manz W, Schulz R, Vogel HJ. Understanding the fate and biological effects of Ag- and TiO₂-nanoparticles in the environment: The quest for advanced analytics and interdisciplinary concepts. THE SCIENCE OF THE TOTAL ENVIRONMENT 2015; 535:3-19. [PMID: 25455109 DOI: 10.1016/j.scitotenv.2014.10.035] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Revised: 10/10/2014] [Accepted: 10/10/2014] [Indexed: 05/29/2023]
Abstract
Engineered inorganic nanoparticles (EINP) from consumers' products and industrial applications, especially silver and titanium dioxide nanoparticles (NP), are emitted into the aquatic and terrestrial environments in increasing amounts. However, the current knowledge on their environmental fate and biological effects is diverse and renders reliable predictions complicated. This review critically evaluates existing knowledge on colloidal aging mechanisms, biological functioning and transport of Ag NP and TiO2 NP in water and soil and it discusses challenges for concepts, experimental approaches and analytical methods in order to obtain a comprehensive understanding of the processes linking NP fate and effects. Ag NP undergo dissolution and oxidation with Ag2S as a thermodynamically determined endpoint. Nonetheless, Ag NP also undergo colloidal transformations in the nanoparticulate state and may act as carriers for other substances. Ag NP and TiO2 NP can have adverse biological effects on organisms. Whereas Ag NP reveal higher colloidal stability and mobility, the efficiency of NOM as a stabilizing agent is greater towards TiO2 NP than towards Ag NP, and multivalent cations can dominate the colloidal behavior over NOM. Many of the past analytical obstacles have been overcome just recently. Single particle ICP-MS based methods in combination with field flow fractionation techniques and hydrodynamic chromatography have the potential to fill the gaps currently hampering a comprehensive understanding of fate and effects also at a low field relevant concentrations. These analytical developments will allow for mechanistically orientated research and transfer to a larger set of EINP. This includes separating processes driven by NP specific properties and bulk chemical properties, categorization of effect-triggering pathways directing the EINP effects towards specific recipients, and identification of dominant environmental parameters triggering fate and effect of EINP in specific ecosystems (e.g. soil, lake, or riverine systems).
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Affiliation(s)
- Gabriele E Schaumann
- Universität Koblenz-Landau, Institute for Environmental Sciences, Group of Environmental and Soil Chemistry, Fortstr. 7, D-76829 Landau, Germany.
| | - Allan Philippe
- Universität Koblenz-Landau, Institute for Environmental Sciences, Group of Environmental and Soil Chemistry, Fortstr. 7, D-76829 Landau, Germany.
| | - Mirco Bundschuh
- Universität Koblenz-Landau, Institute for Environmental Sciences, Group of Ecotoxicology and Environment, Fortstr. 7, D-76829 Landau, Germany; Swedish University of Agricultural Sciences, Department of Aquatic Sciences and Assessment, Lennart Hjelms väg 9, SE-75007 Uppsala, Sweden.
| | - George Metreveli
- Universität Koblenz-Landau, Institute for Environmental Sciences, Group of Environmental and Soil Chemistry, Fortstr. 7, D-76829 Landau, Germany.
| | - Sondra Klitzke
- Albert-Ludwigs-Universität Freiburg, Institute of Forest Sciences, Chair of Soil Ecology, 79085 Freiburg i.Br., Germany; Berlin University of Technology, Institute of Ecology, Department of Soil Science, Ernst-Reuter-Platz 1, D-10587 Berlin, Germany.
| | - Denis Rakcheev
- Universität Koblenz-Landau, Institute for Environmental Sciences, Group of Environmental and Soil Chemistry, Fortstr. 7, D-76829 Landau, Germany.
| | - Alexandra Grün
- Universität Koblenz-Landau, Institute for Integrated Natural Sciences, Dept. of Biology, Universitätsstr. 1, D-56070 Koblenz, Germany.
| | - Samuel K Kumahor
- Helmholtz Centre for Environmental Research - UFZ, Department of Soil Physics, Theodor-Lieser-Strasse 4, D-06120 Halle, Germany.
| | - Melanie Kühn
- Technische Universität München, Institute of Hydrochemistry, Marchioninistr. 17, D-81377 Munich, Germany.
| | - Thomas Baumann
- Technische Universität München, Institute of Hydrochemistry, Marchioninistr. 17, D-81377 Munich, Germany.
| | - Friederike Lang
- Albert-Ludwigs-Universität Freiburg, Institute of Forest Sciences, Chair of Soil Ecology, 79085 Freiburg i.Br., Germany.
| | - Werner Manz
- Universität Koblenz-Landau, Institute for Integrated Natural Sciences, Dept. of Biology, Universitätsstr. 1, D-56070 Koblenz, Germany.
| | - Ralf Schulz
- Universität Koblenz-Landau, Institute for Environmental Sciences, Group of Ecotoxicology and Environment, Fortstr. 7, D-76829 Landau, Germany.
| | - Hans-Jörg Vogel
- Helmholtz Centre for Environmental Research - UFZ, Department of Soil Physics, Theodor-Lieser-Strasse 4, D-06120 Halle, Germany; Martin-Luther-University Halle-Wittenberg, Institute of Soil Science and Plant Nutrition, Von-Seckendorff-Platz 3, 06120 Halle/Saale, Germany.
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21
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Ko KS, Ha K, Kong IC. Effects of Monotypic and Binary Mixtures of Metal Oxide Nanoparticles on Microbial Growth in Sandy Soil Collected from Artificial Recharge Sites. Int J Mol Sci 2015; 16:27967-77. [PMID: 26610489 PMCID: PMC4661924 DOI: 10.3390/ijms161126066] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2015] [Revised: 11/17/2015] [Accepted: 11/17/2015] [Indexed: 11/16/2022] Open
Abstract
The potential effects of monotypic and binary metal oxide nanoparticles (NPs, ZnO, NiO, Co₃O₄ and TiO₂) on microbial growth were evaluated in sandy soil collected from artificial recharge sites. Microbial growth was assessed based on adenosine triphosphate (ATP) content, dehydrogenase activity (DHA), and viable cell counts (VCC). Microbial growth based on ATP content and VCC showed considerable differences depending on NP type and concentration, whereas DHA did not significantly change. In general, ZnO NPs showed the strongest effect on microbial growth in all measurements, showing an EC50 value of 10.9 mg/L for ATP content. The ranking (EC50) of NPs based on their effect on microbial growth assessed by ATP content and VCC was ZnO > Co₃O₄ > NiO > TiO₂. Upon exposure to binary NP mixtures, synergistic and additive modes of action were observed for ATP content and VCC, respectively. The ranges of observed (P(O)) and expected (P(E)) activity were 83%-92% and 78%-82% of the control (p-value 0.0010) based on ATP content and 78%-95% and 72%-94% of the control (p-value 0.8813) based on VCC under the tested conditions, respectively. The results indicate that the effects of NP mixtures on microbial growth in the sandy soil matrix were as great, or greater, than those of single NPs. Therefore, understanding the effects of single NPs and NP mixtures is essential for proper ecological risk assessment. Additionally, these findings demonstrate that the evaluation of NP effects may be profoundly influenced by the method of microbial growth measurement.
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Affiliation(s)
- Kyung-Seok Ko
- Groundwater Department, Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources (KIGAM), Daejeon 34132, Korea.
| | - Kyoochul Ha
- Groundwater Department, Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources (KIGAM), Daejeon 34132, Korea.
| | - In Chul Kong
- Department of Environmental Engineering, Yeungnam University, Gyeongbuk 38541, Korea.
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Kurlanda-Witek H, Ngwenya BT, Butler IB. The influence of biofilms on the mobility of bare and capped zinc oxide nanoparticles in saturated sand and glass beads. JOURNAL OF CONTAMINANT HYDROLOGY 2015; 179:160-170. [PMID: 26140853 DOI: 10.1016/j.jconhyd.2015.06.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Revised: 04/26/2015] [Accepted: 06/23/2015] [Indexed: 06/04/2023]
Abstract
Biofilms are a common constituent of the subsurface and are known to influence contaminant transport; however only a few studies to date have addressed microbial controls on nanoparticle mobility in porous media. The impact of a 3-day Pantoea agglomerans biofilm on the mobility of zinc oxide (ZnO) nanoparticles was studied in column experiments containing sand and glass beads at near-neutral pH and constant ionic strength. Bare ZnO nanoparticles (bZnO-NPs) and ZnO nanoparticles capped with tri-aminopropyltriethoxysilane (cZnO-NPs) were used in the experiments. Breakthrough curves demonstrate that the biofilm particularly slowed nanoparticle migration of bZnO-NPs in glass bead columns and cZnO-NPs in sand columns. With the exception of bZnO-NPs in sand columns, biofilm-coated porous media retained more nanoparticles than those of controls without biofilm. The biofilm may bear an impact on the surface charge of the porous medium, nullifying porous medium-specific effects. Although viable cell counts (VCCs) decreased after the introduction of electrolyte and before nanoparticle transport experiments, SEM and CLSM imaging of porous medium samples taken from columns after nanoparticle transport experiments, as well as total organic carbon (TOC) measurements reveal that biofilm was present in the columns throughout the experiments. Hence, it can be concluded that even a thin amount of biofilm can hinder nanoparticle migration in small-scale porous medium experiments. Moreover, nanoparticle mobility is dependent on the binding capacity of biofilms, rather than the type of porous media.
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Affiliation(s)
- H Kurlanda-Witek
- Mott MacDonald Polska Sp. z o.o., ul. Waliców 11, 00-851 Warsaw, Poland.
| | - B T Ngwenya
- School of GeoSciences, University of Edinburgh Kings Buildings, West Mains Rd, EH9 3JW Edinburgh, United Kingdom
| | - I B Butler
- School of GeoSciences, University of Edinburgh Kings Buildings, West Mains Rd, EH9 3JW Edinburgh, United Kingdom
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Characterisation of the physical composition and microbial community structure of biofilms within a model full-scale drinking water distribution system. PLoS One 2015; 10:e0115824. [PMID: 25706303 PMCID: PMC4338064 DOI: 10.1371/journal.pone.0115824] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2014] [Accepted: 12/02/2014] [Indexed: 11/19/2022] Open
Abstract
Within drinking water distribution systems (DWDS), microorganisms form multi-species biofilms on internal pipe surfaces. A matrix of extracellular polymeric substances (EPS) is produced by the attached community and provides structure and stability for the biofilm. If the EPS adhesive strength deteriorates or is overcome by external shear forces, biofilm is mobilised into the water potentially leading to degradation of water quality. However, little is known about the EPS within DWDS biofilms or how this is influenced by community composition or environmental parameters, because of the complications in obtaining biofilm samples and the difficulties in analysing EPS. Additionally, although biofilms may contain various microbial groups, research commonly focuses solely upon bacteria. This research applies an EPS analysis method based upon fluorescent confocal laser scanning microscopy (CLSM) in combination with digital image analysis (DIA), to concurrently characterize cells and EPS (carbohydrates and proteins) within drinking water biofilms from a full-scale DWDS experimental pipe loop facility with representative hydraulic conditions. Application of the EPS analysis method, alongside DNA fingerprinting of bacterial, archaeal and fungal communities, was demonstrated for biofilms sampled from different positions around the pipeline, after 28 days growth within the DWDS experimental facility. The volume of EPS was 4.9 times greater than that of the cells within biofilms, with carbohydrates present as the dominant component. Additionally, the greatest proportion of EPS was located above that of the cells. Fungi and archaea were established as important components of the biofilm community, although bacteria were more diverse. Moreover, biofilms from different positions were similar with respect to community structure and the quantity, composition and three-dimensional distribution of cells and EPS, indicating that active colonisation of the pipe wall is an important driver in material accumulation within the DWDS.
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24
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Loo CY, Lee WH, Young PM, Cavaliere R, Whitchurch CB, Rohanizadeh R. Implications and emerging control strategies for ventilator-associated infections. Expert Rev Anti Infect Ther 2015; 13:379-93. [DOI: 10.1586/14787210.2015.1007045] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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25
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Ben-Sasson M, Lu X, Bar-Zeev E, Zodrow KR, Nejati S, Qi G, Giannelis EP, Elimelech M. In situ formation of silver nanoparticles on thin-film composite reverse osmosis membranes for biofouling mitigation. WATER RESEARCH 2014; 62:260-270. [PMID: 24963888 DOI: 10.1016/j.watres.2014.05.049] [Citation(s) in RCA: 106] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2014] [Revised: 05/25/2014] [Accepted: 05/27/2014] [Indexed: 06/03/2023]
Abstract
The potential to incorporate silver nanoparticles (Ag-NPs) as biocides in membranes for water purification has gained much interest in recent years. However, a viable strategy for loading the Ag-NPs on the membrane remains challenging. This paper presents a novel, facile procedure for loading Ag-NPs on thin-film composite (TFC) reverse osmosis membranes. Reaction of silver salt with a reducing agent on the membrane surface resulted in uniform coverage of Ag-NPs, irreversibly bound to the membrane, as confirmed by XPS, TEM, and SEM analyses. Salt selectivity of the membrane as well its surface roughness, hydrophilicity, and zeta potential were not impacted by Ag-NP functionalization, while a slight reduction (up to 17%) in water permeability was observed. The formed Ag-NPs imparted strong antibacterial activity to the membrane, leading to reduction of more than 75% in the number of live bacteria attached to the membrane for three model bacteria strains. In addition, confocal microscopy analyses revealed that Ag-NPs significantly suppressed biofilm formation, with 41% reduction in total biovolume and significant reduction in EPS, dead, and live bacteria on the functionalized membrane. The simplicity of the method, the short reaction time, the ability to load the Ag-NPs on site, and the strong imparted antibacterial activity highlight the potential of this method in real-world RO membrane applications.
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Affiliation(s)
- Moshe Ben-Sasson
- Department of Chemical and Environmental Engineering, Yale University, New Haven, CT 06520-8286, USA
| | - Xinglin Lu
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Edo Bar-Zeev
- Department of Chemical and Environmental Engineering, Yale University, New Haven, CT 06520-8286, USA
| | - Katherine R Zodrow
- Department of Chemical and Environmental Engineering, Yale University, New Haven, CT 06520-8286, USA
| | - Siamak Nejati
- Department of Chemical and Environmental Engineering, Yale University, New Haven, CT 06520-8286, USA
| | - Genggeng Qi
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853, USA
| | - Emmanuel P Giannelis
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853, USA
| | - Menachem Elimelech
- Department of Chemical and Environmental Engineering, Yale University, New Haven, CT 06520-8286, USA.
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26
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Zhang M, Zhang K, De Gusseme B, Verstraete W, Field R. The antibacterial and anti-biofouling performance of biogenic silver nanoparticles by Lactobacillus fermentum. BIOFOULING 2014; 30:347-57. [PMID: 24564796 DOI: 10.1080/08927014.2013.873419] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Biofouling is a major challenge in the water industry and public health. Silver nanoparticles (AgNPs) have excellent antimicrobial properties and are considered to be a promising anti-biofouling agent. A modified method was used to produce small sized and well-dispersed biogenic silver nanoparticles with a mean size of ~6 nm (Bio-Ag0-6) using Lactobacillus fermentum. The morphology, size distribution, zeta potential and oxidation state of the silver were systematically characterized. Determination of minimal inhibitory and bactericidal concentration results revealed that biogenic silver Bio-Ag(0-6) can effectively suppress the growth of the test bacteria. Additionally, the inhibition effects of Bio-Ag(0-6) on biofilm formation and on established biofilms were evaluated using P. aeruginosa (ATCC 27853) as the model bacterium. The results from microtiter plates and confocal laser scanning microscopy demonstrated that Bio-Ag(0-6) not only exhibited excellent antibacterial performance but also could control biofilm formation and induce detachment of the bulk of P. aeruginosa biofilms leaving a small residual matrix.
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Affiliation(s)
- Manying Zhang
- a Institute of Urban Environment , Chinese Academy of Sciences , Xiamen , China
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de Faria AF, de Moraes ACM, Alves OL. Toxicity of Nanomaterials to Microorganisms: Mechanisms, Methods, and New Perspectives. Nanotoxicology 2014. [DOI: 10.1007/978-1-4614-8993-1_17] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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28
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Ersoy Omeroglu E, Karaboz I, Sudagidan M. Characteristics and genetic diversity of bioluminescent Shewanella woodyi strains isolated from the Gulf of Izmir, Turkey. Folia Microbiol (Praha) 2013; 59:79-92. [DOI: 10.1007/s12223-013-0269-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2012] [Accepted: 07/08/2013] [Indexed: 10/26/2022]
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Goode KR, Asteriadou K, Robbins PT, Fryer PJ. Fouling and Cleaning Studies in the Food and Beverage Industry Classified by Cleaning Type. Compr Rev Food Sci Food Saf 2013. [DOI: 10.1111/1541-4337.12000] [Citation(s) in RCA: 90] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kylee R. Goode
- School of Chemical Engineering; Univ. of Birmingham; Edgbaston; Birmingham; B15 2TT; U.K
| | - Konstantia Asteriadou
- School of Chemical Engineering; Univ. of Birmingham; Edgbaston; Birmingham; B15 2TT; U.K
| | - Phillip T. Robbins
- School of Chemical Engineering; Univ. of Birmingham; Edgbaston; Birmingham; B15 2TT; U.K
| | - Peter J. Fryer
- School of Chemical Engineering; Univ. of Birmingham; Edgbaston; Birmingham; B15 2TT; U.K
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30
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Nguyen T, Roddick FA, Fan L. Biofouling of water treatment membranes: a review of the underlying causes, monitoring techniques and control measures. MEMBRANES 2012; 2:804-40. [PMID: 24958430 PMCID: PMC4021920 DOI: 10.3390/membranes2040804] [Citation(s) in RCA: 333] [Impact Index Per Article: 25.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 08/03/2012] [Revised: 11/02/2012] [Accepted: 11/05/2012] [Indexed: 01/15/2023]
Abstract
Biofouling is a critical issue in membrane water and wastewater treatment as it greatly compromises the efficiency of the treatment processes. It is difficult to control, and significant economic resources have been dedicated to the development of effective biofouling monitoring and control strategies. This paper highlights the underlying causes of membrane biofouling and provides a review on recent developments of potential monitoring and control methods in water and wastewater treatment with the aim of identifying the remaining issues and challenges in this area.
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Affiliation(s)
- Thang Nguyen
- School of Civil, Environmental and Chemical Engineering, Water: Effective Technologies and Tools (WETT) Centre, RMIT University, Melbourne, VIC. 3001, Australia.
| | - Felicity A Roddick
- School of Civil, Environmental and Chemical Engineering, Water: Effective Technologies and Tools (WETT) Centre, RMIT University, Melbourne, VIC. 3001, Australia.
| | - Linhua Fan
- School of Civil, Environmental and Chemical Engineering, Water: Effective Technologies and Tools (WETT) Centre, RMIT University, Melbourne, VIC. 3001, Australia.
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Wirth SM, Lowry GV, Tilton RD. Natural organic matter alters biofilm tolerance to silver nanoparticles and dissolved silver. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2012; 46:12687-96. [PMID: 23110472 DOI: 10.1021/es301521p] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Motivated by the need to understand environmental risks posed by potentially biocidal engineered nanoparticles, the effects of silver nanoparticle (AgNP) exposure on viability in single species Pseudomonas fluorescens biofilms were determined via dye staining methods. AgNP dispersions, containing both particles and dissolved silver originating from the particles, negatively impacted biofilm viability in a dose-dependent manner. No silver treatments (up to 100 ppm AgNPs) resulted in 100% biofilm viability loss, even though these same concentrations caused complete viability loss in planktonic culture, suggesting some biofilm tolerance to AgNP toxicity. Colloidally stable AgNP suspensions exhibited greater toxicity to biofilms than corresponding particle-free supernatants containing only dissolved silver released from the particles. This distinct nanoparticle-specific toxicity was not observed for less stable, highly aggregated particles, suggesting that biofilms were protected against nanoparticle aggregate toxicity. In both the stable and highly aggregated dispersions, dissolved silver made a significant contribution to overall toxicity. Therefore, despite increased colloidal stability when humic acid adsorbed to AgNPs, the presence of humic acid mitigated the toxicity of AgNP suspensions because it bound to silver ions in solution.
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Affiliation(s)
- Stacy M Wirth
- Center for the Environmental Implications of Nanotechnology, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
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Study of Antibacterial Efficacy of Hybrid Chitosan-Silver Nanoparticles for Prevention of Specific Biofilm and Water Purification. ACTA ACUST UNITED AC 2011. [DOI: 10.1155/2011/693759] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Antibacterial efficacy of silver nanoparticles (Ag NPs) deposited alternatively layer by layer (LBL) on chitosan polymer in the form of a thin film over a quartz plate and stainless steel strip has been studied. An eight-bilayer chitosan/silver (Cs/Ag)8 hybrid was prepared having a known concentration of silver. Techniques such as UV-visible spectroscopy, inductively coupled plasma optical emission spectroscopy (ICP-OES), and atomic force microscopy (AFM) were carried out to understand and elucidate the physical nature of the film. Gram-negative bacteria, Escherichia coli (E. coli), were used as a test sample in saline solution for antibacterial studies. The growth inhibition at different intervals of contact time and, more importantly, the antibacterial properties of the hybrid film on repeated cycling in saline solution have been demonstrated. AFM studies are carried out for the first time on the microbe to know the morphological changes affected by the hybrid film. The hybrid films on aging (3 months) are found to be as bioactive as before. Cytotoxicity experiments indicated good biocompatibility. The hybrid can be a promising bioactive material for the prevention of biofilms specific to E. coli and in purification of water for safe drinking.
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