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Zeng J, Desmond P, Ngo HH, Lin W, Liu X, Liu B, Li G, Ding A. Membrane modification in enhancement of virus removal: A critical review. J Environ Sci (China) 2024; 146:198-216. [PMID: 38969448 DOI: 10.1016/j.jes.2023.07.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 07/04/2023] [Accepted: 07/04/2023] [Indexed: 07/07/2024]
Abstract
Many waterborne diseases are related with viruses, and COVID-19 worldwide has raised the concern of virus security in water into the public horizon. Compared to other conventional water treatment processes, membrane technology can achieve satisfactory virus removal with fewer chemicals, and prevent the outbreaks of viruses to a maximal extent. Researchers developed new modification methods to improve membrane performance. This review focused on the membrane modifications that enhance the performance in virus removal. The characteristics of viruses and their removal by membrane filtration were briefly generalized, and membrane modifications were systematically discussed through different virus removal mechanisms, including size exclusion, hydrophilic and hydrophobic interactions, electronic interactions, and inactivation. Advanced functional materials for membrane modification were summarized based on their nature. Furthermore, it is suggested that membranes should be enhanced through different mechanisms mainly based on their ranks of pore size. The current review provided theoretical support regarding membrane modifications in the enhancement of virus removal and avenues for practical application.
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Affiliation(s)
- Jie Zeng
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Peter Desmond
- Institute of Environmental Engineering (ISA), RWTH Aachen University, Aachen 52056, Germany
| | - Huu Hao Ngo
- Faculty of Engineering, University of Technology Sydney, Sydney 2007, Australia
| | - Wei Lin
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Xiao Liu
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Bingsheng Liu
- The Second Construction Co. Ltd. of China Construction Third Engineering Bureau, China
| | - Guibai Li
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - An Ding
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China.
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2
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Carvalho-Silva JM, Vilela Teixeira AB, Schiavon MA, Dos Reis AC. Antimicrobial gel with silver vanadate and silver nanoparticles: antifungal and physicochemical evaluation. Future Microbiol 2024:1-11. [PMID: 38979570 DOI: 10.1080/17460913.2024.2366630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Accepted: 06/07/2024] [Indexed: 07/10/2024] Open
Abstract
Aim: To develop a β-AgVO3 gel and evaluate its physicochemical stability and antifungal activity against Candida albicans. Materials & methods: The gel was prepared from the minimum inhibitory concentration (MIC) of β-AgVO3. The physicochemical stability was evaluated by centrifugation, accelerated stability (AS), storage (St), pH, syringability, viscosity and spreadability tests and antifungal activity by the agar diffusion. Results: The MIC was 62.5 μg/ml. After centrifugation, AS and St gels showed physicochemical stability. Lower viscosity and higher spreadability were observed for the higher β-AgVO3 concentration and the minimum force for extrusion was similar for all groups. Antifungal effect was observed only for the β-AgVO3 gel with 20xMIC. Conclusion: The β-AgVO3 gel showed physicochemical stability and antifungal activity.
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Affiliation(s)
- João Marcos Carvalho-Silva
- Department of Dental Materials & Prosthesis, Ribeirão Preto School of Dentistry, University of São Paulo (USP), Ribeirão Preto, Brazil
| | - Ana Beatriz Vilela Teixeira
- Department of Dental Materials & Prosthesis, Ribeirão Preto School of Dentistry, University of São Paulo (USP), Ribeirão Preto, Brazil
| | - Marco Antônio Schiavon
- Department of Natural Sciences, Federal University of São João del-Rei, São João del-Rei, Brazil
| | - Andréa Cândido Dos Reis
- Department of Dental Materials & Prosthesis, Ribeirão Preto School of Dentistry, University of São Paulo (USP), Ribeirão Preto, Brazil
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Rahman S, Sadaf S, Hoque ME, Mishra A, Mubarak NM, Malafaia G, Singh J. Unleashing the promise of emerging nanomaterials as a sustainable platform to mitigate antimicrobial resistance. RSC Adv 2024; 14:13862-13899. [PMID: 38694553 PMCID: PMC11062400 DOI: 10.1039/d3ra05816f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 04/02/2024] [Indexed: 05/04/2024] Open
Abstract
The emergence and spread of antibiotic-resistant (AR) bacterial strains and biofilm-associated diseases have heightened concerns about exploring alternative bactericidal methods. The WHO estimates that at least 700 000 deaths yearly are attributable to antimicrobial resistance, and that number could increase to 10 million annual deaths by 2050 if appropriate measures are not taken. Therefore, the increasing threat of AR bacteria and biofilm-related infections has created an urgent demand for scientific research to identify novel antimicrobial therapies. Nanomaterials (NMs) have emerged as a promising alternative due to their unique physicochemical properties, and ongoing research holds great promise for developing effective NMs-based treatments for bacterial and viral infections. This review aims to provide an in-depth analysis of NMs based mechanisms combat bacterial infections, particularly those caused by acquired antibiotic resistance. Furthermore, this review examines NMs design features and attributes that can be optimized to enhance their efficacy as antimicrobial agents. In addition, plant-based NMs have emerged as promising alternatives to traditional antibiotics for treating multidrug-resistant bacterial infections due to their reduced toxicity compared to other NMs. The potential of plant mediated NMs for preventing AR is also discussed. Overall, this review emphasizes the importance of understanding the properties and mechanisms of NMs for the development of effective strategies against antibiotic-resistant bacteria.
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Affiliation(s)
- Sazedur Rahman
- Department of Mechanical and Production Engineering, Ahsanullah University of Science and Technology Dhaka Bangladesh
| | - Somya Sadaf
- Department of Civil and Environmental Engineering, Birla Institute of Technology Mesra Ranchi 835215 Jharkhand India
| | - Md Enamul Hoque
- Department of Biomedical Engineering, Military Institute of Science and Technology Dhaka Bangladesh
| | - Akash Mishra
- Department of Civil and Environmental Engineering, Birla Institute of Technology Mesra Ranchi 835215 Jharkhand India
| | - Nabisab Mujawar Mubarak
- Petroleum and Chemical Engineering, Faculty of Engineering, Universiti Teknologi Brunei Bandar Seri Begawan BE1410 Brunei Darussalam
- Department of Chemistry, School of Chemical Engineering and Physical Sciences, Lovely Professional University Jalandhar Punjab India
| | - Guilherme Malafaia
- Post-Graduation Program in Conservation of Cerrado Natural Resources, Goiano Federal Institute Urutaí GO Brazil
| | - Jagpreet Singh
- Department of Chemistry, University Centre for Research and Development, Chandigarh University Mohali-140413 India
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Ihsan S, Gul H, Jamila N, Khan N, Ullah R, Bari A, Nee TW, Hwang JH, Masood R. Biogenic Salvia species synthesized silver nanoparticles with catalytic, sensing, antimicrobial, and antioxidant properties. Heliyon 2024; 10:e25814. [PMID: 38375246 PMCID: PMC10875438 DOI: 10.1016/j.heliyon.2024.e25814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 01/25/2024] [Accepted: 02/02/2024] [Indexed: 02/21/2024] Open
Abstract
Salvia (Lamiaceae family) is used as a brain tonic to improve cognitive function. The species including S. plebeia and S. moorcroftiana are locally used to cure hepatitis, cough, tumours, hemorrhoids, diarrhoea, common cold, flu, and asthma. To the best of authors' knowledge, no previous study has been conducted on synthesis of S. plebeia and S. moorcroftiana silver nanoparticles (SPAgNPs and SMAgNPs). The study was aimed to synthesize AgNPs from the subject species aqueous and ethanol extracts, and assess catalytic potential in degradation of standard and extracted (from yums, candies, and snacks) dyes, nitrophenols, and antibiotics. The study also aimed at AgNPs as probe in sensing metalloids and heavy metal ions including Pb2+, Cu2+, Fe3+, Ni2+, and Zn2+. From the results, it was found that Salvia aqueous extract afforded stable AgNPs in 1:9 and 1:15 (quantity of aqueous extract and silver nitrate solution concentration) whereas ethanol extract yielded AgNPs in 1:10 (quantity of ethanol extract and silver nitrate solution concentration) reacted in sunlight. The size of SPAgNPs and SMAgNPs determined by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were 21.7 nm and 19.9 nm, with spherical, cylindrical, and deep hollow morphology. The synthesized AgNPs demonstrated significant potential as catalyst in dyes; Congo red (85 %), methylene blue (75 %), Rhodamine B (<50 %), nitrophenols; ortho-nitrophenol (95-98 %) and para-nitrophenol (95-98 %), dyes extracted from food samples including yums, candies, and snacks. The antibiotics (amoxicillin, doxycycline, levofloxacin) degraded up to 80 %-95 % degradation. Furthermore, the synthesized AgNPs as probe in sensing of Pb2+, Cu2+, and Fe3+ in Kabul river water, due to agglomeration, caused a significant decrease and bathochromic shift of SPR band (430 nm) when analyzed after 30 min. The Pb2+ ions was comparatively more agglomerated and chelated. Thus, the practical applicability of AgNPs in Pb2+ sensing was significant. Based on the results of this research study, the synthesized AgNPs could provide promising efficiency in wastewater treatment containing organic dyes, antibiotics, and heavy metals.
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Affiliation(s)
- Sana Ihsan
- Department of Chemistry, Shaheed Benazir Bhutto Women University, Peshawar, 25000, Khyber Pakhtunkhwa, Pakistan
| | - Hajera Gul
- Department of Chemistry, Shaheed Benazir Bhutto Women University, Peshawar, 25000, Khyber Pakhtunkhwa, Pakistan
| | - Nargis Jamila
- Department of Chemistry, Shaheed Benazir Bhutto Women University, Peshawar, 25000, Khyber Pakhtunkhwa, Pakistan
| | - Naeem Khan
- Department of Chemistry, Kohat University of Science and Technology, Kohat, 26000, Khyber Pakhtunkhwa, Pakistan
| | - Riaz Ullah
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Ahmed Bari
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Tan Wen Nee
- Chemistry Section, School of Distance Education, Universiti Sains Malaysia, 11800, Minden, Penang, Malaysia
| | - Joon Ho Hwang
- Nanobio Research Center, Jeonnam Bioindustry Foundation (JBF), Jangsung-gun, Jeollanam-do, 57248, South Korea
| | - Rehana Masood
- Department of Biochemistry, Shaheed Benazir Bhutto Women University, Peshawar, 25000, Khyber Pakhtunkhwa, Pakistan
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Tata P, Ganesan R, Ray Dutta J. Amplifying bactericidal activity: Surfactant-mediated AgBr thin film coating over two-dimensional vertically aligned ZnO nanorods for dark-light dual mode disinfection. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2024; 250:112815. [PMID: 37995494 DOI: 10.1016/j.jphotobiol.2023.112815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 11/10/2023] [Accepted: 11/17/2023] [Indexed: 11/25/2023]
Abstract
Thin film coatings with potent antibacterial properties find critical applications in diverse domains such as medical devices, frequently touched surfaces, and food packaging for combating microbial proliferation across diverse scenarios. Two-dimensional photocatalytic antimicrobial coatings, offering a substantial actual-to-apparent surface ratio, hold immense potential for achieving this objective. However, realizing antibacterial performance not just under light but also in dark conditions remains a challenge. To address this, we present AgBr-coated vertically aligned ZnO nanorods (NRs) thin film architecture, employing a unique surfactant-mediated solution-phase spin-coating approach for achieving uniform deposition of AgBr onto ZnO NRs. The resulting ZnO NRs/AgBr heterojunction architectures have been characterized for their microstructural, morphological, elemental, optical, and wettability attributes. The studies have ascertained the tunability of AgBr content by modulating the concentration of its surfactant-based precursor solution. Further, valence band (VB) analyses revealed an increase in the electron density near to the VB edge. The dual role of AgBr as an antimicrobial agent and a photosensitizer, effectively enhancing the visible-light photodisinfection efficacy of ZnO NRs, has been evident through the dark-light dual mode antibacterial studies. Electron paramagnetic resonance measurements have shown hydroxyl radicals being majorly responsible for the visible-light photodisinfection performance. Encouragingly, reusability assessments showcase significant promise, while artificial sweat-wiping studies on the structures unveil heightened photodisinfection efficacy. This enhancement could be attributed to components like urea and lactic acid, speculated to augment the photocatalytic efficiency by minimizing charge recombination.
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Affiliation(s)
- Pranathi Tata
- Department of Biological Sciences, Birla Institute of Technology and Science (BITS), Pilani, Hyderabad Campus, Jawahar Nagar, Kapra Mandal, Medchal District, Hyderabad, Telangana 500078, India
| | - Ramakrishnan Ganesan
- Department of Chemistry, Birla Institute of Technology and Science (BITS), Pilani, Hyderabad Campus, Jawahar Nagar, Kapra Mandal, Medchal District, Hyderabad, Telangana 500078, India.
| | - Jayati Ray Dutta
- Department of Biological Sciences, Birla Institute of Technology and Science (BITS), Pilani, Hyderabad Campus, Jawahar Nagar, Kapra Mandal, Medchal District, Hyderabad, Telangana 500078, India.
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Nazeer MNM, Aholaakko TK. Using photon disinfection technologies for reducing bioburden in hospitals. BRITISH JOURNAL OF NURSING (MARK ALLEN PUBLISHING) 2023; 32:818-825. [PMID: 37737852 DOI: 10.12968/bjon.2023.32.17.818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/23/2023]
Abstract
BACKGROUND Environmental cleaning and disinfection is the basis of the prevention of healthcare-acquired infections (HAIs). AIM This study aimed to describe photon disinfection technologies (PDTs), report their impact on inactivating micro-organisms and preventing HAIs and to create recommendations for their implementation in hospital settings. METHODS An integrated literature review was completed to evaluate and report the impact of PDTs in hospital settings. The quality of 23 articles were assessed, their contents analysed and results reported according to the PICOT model. FINDINGS The microbiological impact of the PDT varied by micro-organism, settings and according to the used devices. It was crucial that environmental cleaning was completed before the disinfection. CONCLUSION The implementation of PDT in the hospital setting requires inquiry from the viewpoints of microbiological, environmental, occupational, technical and human safety. To enhance the safe implementation of PDTs, the construction and use of evidence-based global standards for PDT are crucial.
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Affiliation(s)
| | - Teija-Kaisa Aholaakko
- Principal Lecturer, Development Unit Education, Laurea University of Applied Sciences, Vantaa, Finland
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Yang S, Dai J, Aweya JJ, Lin R, Weng W, Xie Y, Jin R. The Antibacterial Activity and Pickering Emulsion Stabilizing Effect of a Novel Peptide, SA6, Isolated from Salt-Fermented Penaeus vannamei. FOOD BIOPROCESS TECH 2023. [DOI: 10.1007/s11947-023-03000-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Liu B, Wang S, Wang H, Wang Y, Xiao Y, Cheng Y. Quaternary Ammonium Groups Modified Magnetic Cyclodextrin Polymers for Highly Efficient Dye Removal and Sterilization in Water Purification. MOLECULES (BASEL, SWITZERLAND) 2022; 28:molecules28010167. [PMID: 36615361 PMCID: PMC9822413 DOI: 10.3390/molecules28010167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Revised: 12/19/2022] [Accepted: 12/22/2022] [Indexed: 12/28/2022]
Abstract
Water recovery is a significant proposition for human survival and sustainable development, and we never stop searching for more efficient, easy-operating, low-cost and environmentally friendly methods to decontaminate water bodies. Herein, we combined the advantages of β-cyclodextrin (β-CD), magnetite nanoparticles (MNs), and two kinds of quaternary ammonium salts to synthesize two porous quaternary ammonium groups capped magnetic β-CD polymers (QMCDP1 and QMCDP2) to remove organic pollutants and eradicate pathogenic microorganisms effectively through a single implementation. In this setting, β-CD polymer (CDP) was utilized as the porous substrate material, while MNs endowed the materials with excellent magnetism enhancing recyclability in practical application scenarios, and the grafting of quaternary ammonium groups was beneficial for the adsorption of anionic dyes and sterilization. Both QMCDPs outperformed uncapped MCDPs in their adsorption ability of anionic pollutants, using methyl blue (MB) and orange G (OG) as model dyes. Additionally, QMCDP2, which was modified with longer alkyl chains than QMCDP1, exhibits superior bactericidal efficacy with a 99.47% removal rate for Staphylococcus aureus. Accordingly, this study provides some insights into designing a well-performed and easily recyclable adsorbent for simultaneous sterilization and adsorption of organic contaminants in wastewater.
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Affiliation(s)
- Bingjie Liu
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
| | - Shuoxuan Wang
- School of Science, Tianjin University, Tianjin 300350, China
| | - He Wang
- School of Science, Tianjin University, Tianjin 300350, China
| | - Yong Wang
- School of Science, Tianjin University, Tianjin 300350, China
- Correspondence: (Y.W.); (Y.X.); (Y.C.)
| | - Yin Xiao
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
- Correspondence: (Y.W.); (Y.X.); (Y.C.)
| | - Yue Cheng
- School of Science, Tianjin University, Tianjin 300350, China
- Correspondence: (Y.W.); (Y.X.); (Y.C.)
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Hu ZT, Wang XF, Xiang S, Ding Y, Zhao DY, Hu M, Pan Z, Varjani S, Wong JWC, Zhao J. Self-cleaning MnZn ferrite/biochar adsorbents for effective removal of tetracycline. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 844:157202. [PMID: 35810898 DOI: 10.1016/j.scitotenv.2022.157202] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 07/02/2022] [Accepted: 07/02/2022] [Indexed: 06/15/2023]
Abstract
A renewable tri-metallic spinel decorated biochar adsorbent (MZF-BC) was fabricated by a facile hydrothermal method and to remove tetracycline. The physicochemical properties of MZF-BC were well studied. MZF-BC with a hybrid pore structure of mesopores (~7.6 nm) and macropores (~50 nm) has the maximum tetracycline adsorption capacity reaching 142.4 mg g-1. Through the study of adsorption kinetics, isotherms and key influencing factors, it was found that MZF-BC adsorption on tetracycline was primarily multi-layer effect with the initial adsorption behavior of pore filling associated with hydrogen bonding and π-π stacking. Furthermore, the MZF-BC performs excellent regeneration ability by driving Fenton-like catalysis as the self-cleaning process in the liquid phase. This study contributes to a new insight into the in-situ regeneration of biochar-based adsorbents after adsorbing organic pollutants in pharmaceutical wastewater treatment.
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Affiliation(s)
- Zhong-Ting Hu
- College of Environment, Zhejiang University of Technology (ZJUT), Hangzhou 310014, China; Industrial Catalysts Institute of ZJUT, Hangzhou 310014, China; Zhejiang PUZE Environmental Protection Technology Pte Ltd, Ningbo 315301, China
| | - Xiao-Fang Wang
- College of Environment, Zhejiang University of Technology (ZJUT), Hangzhou 310014, China
| | - Shuo Xiang
- School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou 310023, China
| | - Yin Ding
- College of Environment, Zhejiang University of Technology (ZJUT), Hangzhou 310014, China
| | - Dong-Yang Zhao
- Industrial Catalysts Institute of ZJUT, Hangzhou 310014, China
| | - Mian Hu
- College of Environment, Zhejiang University of Technology (ZJUT), Hangzhou 310014, China
| | - Zhiyan Pan
- College of Environment, Zhejiang University of Technology (ZJUT), Hangzhou 310014, China
| | - Sunita Varjani
- Gujarat Pollution Control Board, Gandhinagar, Gujarat 382 010, India
| | - Jonathan Woon-Chung Wong
- Institute of Bioresource and Agriculture and Sino-Forest Applied Research Centre for Pearl River Delta Environment, Department of Biology, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| | - Jun Zhao
- Institute of Bioresource and Agriculture and Sino-Forest Applied Research Centre for Pearl River Delta Environment, Department of Biology, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China.
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Yuan M, Xue J, Li J, Ma S, Wang M. PCN-222/Ag2O-Ag p-n heterojunction modified fabric as recyclable photocatalytic platform for boosting bacteria inactivation and organic pollutant degradation. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.130474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Wang L, Hu Z, Hu M, Zhao J, Zhou P, Zhang Y, Zheng X, Zhang Y, Hu ZT, Pan Z. Cometabolic biodegradation system employed subculturing photosynthetic bacteria: A new degradation pathway of 4-chlorophenol in hypersaline wastewater. BIORESOURCE TECHNOLOGY 2022; 361:127670. [PMID: 35878775 DOI: 10.1016/j.biortech.2022.127670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 07/17/2022] [Accepted: 07/18/2022] [Indexed: 06/15/2023]
Abstract
4-chlorophenol (4-CP) as a toxic persistent pollutant is quite difficult treatment by using traditional biological processes. Herein, photosynthetic bacteria (PSB) driven cometabolic biodegradation system associated with exogeneous carbon sources (e.g., sodium acetate) has been demonstrated as an effective microbial technique. The biodegradation rate (ri) can be at 0.041 d-1 with degradation efficiency of 93% in 3094 lx. Through the study of subculturing PSB in absence of NaCl, it was found that 50% inoculation time can be saved but keeping a similar 4-CP biodegradation efficiency in scale-up salinity system. A new plausible biodegradation pathway for 4-CP in 4th G PSB cometabolic system is proposed based on the detected cyclohexanone generation followed by ring opening. It is probably ascribed to the increasement of Firmicutes and Bacteroidetes at phyla level classified based on microbial community. This study contributes to a new insight into cometabolic technology for chlorophenol treatment in industrial hypersaline wastewater.
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Affiliation(s)
- Liang Wang
- College of Environment, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, Zhejiang 310014, PR China
| | - Zhongce Hu
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, Zhejiang 310014, PR China
| | - Mian Hu
- College of Environment, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, Zhejiang 310014, PR China
| | - Jun Zhao
- Institute of Bioresource and Agriculture, Hong Kong Baptist University, Hong Kong Special Administrative Region
| | - Peijie Zhou
- College of Environment, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, Zhejiang 310014, PR China
| | - Yongjie Zhang
- College of Environment, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, Zhejiang 310014, PR China
| | - Xin Zheng
- College of Environment, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, Zhejiang 310014, PR China
| | - Yifeng Zhang
- Department of Environmental & Resource Engineering, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
| | - Zhong-Ting Hu
- College of Environment, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, Zhejiang 310014, PR China
| | - Zhiyan Pan
- College of Environment, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, Zhejiang 310014, PR China.
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Functionalised Anodised Aluminium Oxide as a Biocidal Agent. Int J Mol Sci 2022; 23:ijms23158327. [PMID: 35955460 PMCID: PMC9369004 DOI: 10.3390/ijms23158327] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 07/18/2022] [Accepted: 07/26/2022] [Indexed: 02/04/2023] Open
Abstract
In this article, we describe the antimicrobial properties of a new composite based on anodic aluminium oxide (AAO) membranes containing propyl-copper-phosphonate units arranged at a predetermined density inside the AAO channels. The samples were prepared with four concentrations of copper ions and tested as antimicrobial drug on four different strains of Escherichia coli (K12, R2, R3 and R4). For comparison, the same strains were tested with three types of antibiotics using the minimal inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) tests. Moreover, DNA was isolated from the analysed bacteria which was additionally digested with formamidopyrimidine-DNA glycosylase (Fpg) protein from the group of repair glycosases. These enzymes are markers of modified oxidised bases in nucleic acids produced during oxidative stress in cells. Preliminary cellular studies, MIC and MBC tests and digestion with Fpg protein after modification of bacterial DNA suggest that these compounds may have greater potential as antibacterial agents than antibiotics such as ciprofloxacin, bleomycin and cloxacillin. The described composites are highly specific for the analysed model Escherichia coli strains and may be used in the future as new substitutes for commonly used antibiotics in clinical and nosocomial infections in the progressing pandemic era. The results show much stronger antibacterial properties of the functionalised membranes on the action of bacterial membranes in comparison to the antibiotics in the Fpg digestion experiment. This is most likely due to the strong induction of oxidative stress in the cell through the breakdown of the analysed bacterial DNA. We have also observed that the intermolecular distances between the functional units play an important role for the antimicrobial properties of the used material. Hence, we utilised the idea of the 2D solvent to tailor them.
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