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Singh AK, Bhardwaj K. Mechanistic understanding of green synthesized cerium nanoparticles for the photocatalytic degradation of dyes and antibiotics from aqueous media and antimicrobial efficacy: A review. ENVIRONMENTAL RESEARCH 2024; 246:118001. [PMID: 38145730 DOI: 10.1016/j.envres.2023.118001] [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: 05/22/2023] [Revised: 12/10/2023] [Accepted: 12/19/2023] [Indexed: 12/27/2023]
Abstract
In recent years, extensive research endeavors are being undertaken for synthesis of an efficient, economic and eco-friendly cerium oxide nanoparticles (CeO2 NPs) using plant extract mediated greener approach. A number of medicinal plants and their specific parts (flowers, bark, seeds, fruits, seeds and leaves) have been found to be capable of synthesizing CeO2 NPs. The specific key phytochemical constituents of plants such as alkaloids, terpenoids, phenolic acids, flavones and tannins can play significant role as a reducing, stabilizing and capping agents in the synthesis of CeO2 NPs from their respective precursor solution of metal ions. The CeO2 NPs are frequently using in diverse fields of science and technology including photocatalytic degradation of dyes, antibiotics as well as antimicrobial applications. In this review, the mechanism behind the green synthesis CeO2 NPs using plant entities are summarized along with discussion of analytical results from characterization techniques. An overview of CeO2 NPs for water remediation application via photocatalytic degradation of dyes and antibiotics are discussed. In addition, the mechanisms of antimicrobial efficacy of CeO2 NPs and current challenges for their sustainable application at large scale in real environmental conditions are discussed.
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Affiliation(s)
- Arun K Singh
- Department of Chemistry, M. M. Engineering College, Maharishi Markandeshwar (Deemed to Be University), Mullana, Ambala, Haryana, 133207, India.
| | - Kajal Bhardwaj
- Department of Chemistry, M. M. Engineering College, Maharishi Markandeshwar (Deemed to Be University), Mullana, Ambala, Haryana, 133207, India
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Yagmur Goren A, Erdemir D, Dincer I. Comprehensive review and assessment of carbon capturing methods and technologies: An environmental research. ENVIRONMENTAL RESEARCH 2024; 240:117503. [PMID: 37907166 DOI: 10.1016/j.envres.2023.117503] [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: 07/21/2023] [Revised: 10/05/2023] [Accepted: 10/23/2023] [Indexed: 11/02/2023]
Abstract
A majority of the primary contributors of carbon dioxide (CO2) emissions into the environment have really been out of human-made activities. The levels of CO2 in the atmosphere have increased substantially since the time of the industrial revolution. This has been linked to the use of fossil fuels for energy production, as well as the widespread production of some industrial components like cement and the encroaching destruction of forests. An extreme approach is now necessary to develop the right policies and address the local and global environmental issues in the right way. In this regard, CO2 capturing, utilization, and storage are reliable options that industrial facilities can initiate to overcome this problem. Therefore, we have evaluated the two leading technologies that are used for carbon capture: direct (pre-combustion, post-combustion, and oxy-combustion) and indirect carbon (reforestation, enhanced weathering, bioenergy with carbon capture, and agricultural practices) capturing to provide their current status and progresses. Among the considered processes, the post-combustion techniques are widely utilized on a commercial scale, especially in industrial applications. Technology readiness level (TRL) results have showed that amine solvents, pressure-vacuum swing adsorption, and gas separation membranes have the highest TRL value of 9. In addition, the environmental impact assessment methods have been ranked to evaluate their sustainability levels. The highest global warming potential of 219.53 kgCO2 eq./MWh has been obtained for the post-combustion process. Overall, through this comprehensive review, we have identified some critical research gaps in the open literature in the field of CO2-capturing methods where there are strong needs for future research and technology development studies, for instance, developing stable and cost-effective liquid solvents and improving the adsorption capacity of commercialized sorbents. Furthermore, some research areas, like novel process design, environmental and economic impact assessment of capturing methods with different chemicals and modeling and simulation studies, will require further effort to demonstrate the developed technologies for pilot and commercial-scale applications.
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Affiliation(s)
- Aysegul Yagmur Goren
- Ontario Tech University, Clean Energy Research Laboratory, Oshawa, Ontario, Canada; Izmir Institute of Technology, Department of Environmental Engineering, Urla, Izmir, Turkey.
| | - Dogan Erdemir
- Ontario Tech University, Clean Energy Research Laboratory, Oshawa, Ontario, Canada; Yildiz Technical University, Department of Mechanical Engineering, Istanbul, Turkey
| | - Ibrahim Dincer
- Ontario Tech University, Clean Energy Research Laboratory, Oshawa, Ontario, Canada; Yildiz Technical University, Department of Mechanical Engineering, Istanbul, Turkey
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Tong WY, Tan WN, Kamarul Azizi MA, Leong CR, El Azab IH, Lim JW, Mahmoud MHH, Dailin DJ, Ibrahim MM, Chuah LF. Nanoparticle-laden contact lens for controlled release of vancomycin with enhanced antibiotic efficacy. CHEMOSPHERE 2023; 338:139492. [PMID: 37451643 DOI: 10.1016/j.chemosphere.2023.139492] [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: 06/04/2023] [Revised: 06/23/2023] [Accepted: 07/11/2023] [Indexed: 07/18/2023]
Abstract
Vancomycin is the last resort antibiotic for the treatment of severe bacterial keratitis. Its clinical application is limited due to its hydrophilicity and high molecular weight. To overcome this, this study aims to develop nanoparticles-laden contact lens for controlled ocular delivery of vancomycin. Polyvinyl alcohol (PVA) was used as encapsulant material. The nanoparticles had a negative surface charge and an average size of 147.6 nm. A satisfactory encapsulation efficiency (61.24%) was obtained. The release profile was observed to be slow and sustained, with a release rate of 1.29 μL mg-1 h-1 for 48 h. Five out of 6 test bacteria were suppressed by vancomycin nanoparticles-laden contact lens. Vancomycin is generally ineffective against Gram-negative bacteria and unable to pass through the outer membrane barrier. In this study, vancomycin inhibited Proteus mirabilis and Pseudomonas aeruginosa. Nano-encapsulation enables vancomycin to penetrate the Gram-negative cell wall and further destroy the bacterial cells. On Hohenstein challenge test, all test bacteria exhibited significant reduction in growth when exposed to vancomycin nanoparticles-laden contact lens. This study created an effective and long-lasting vancomycin delivery system via silicone hydrogel contact lenses, by using PVA as encapsulant. The antibiotic efficacy and vancomycin release should be further studied using ocular in vivo models.
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Affiliation(s)
- Woei Yenn Tong
- Universiti Kuala Lumpur, Branch Campus Institute of Medical Science Technology, A1, 1, Jalan TKS 1, Taman Kajang Sentral, 43000, Kajang, Selangor, Malaysia; Universiti Kuala Lumpur, Branch Campus Malaysian Institute of Chemical and Bioengineering Technology, Lot 1988 Kawasan Perindustrian Bandar Vendor, Taboh Naning, Alor Gajah, Melaka, Malaysia.
| | - Wen-Nee Tan
- School of Distance Education, Universiti Sains Malaysia, 11800, Minden, Penang, Malaysia
| | - Muhammad Afif Kamarul Azizi
- Universiti Kuala Lumpur, Branch Campus Malaysian Institute of Chemical and Bioengineering Technology, Lot 1988 Kawasan Perindustrian Bandar Vendor, Taboh Naning, Alor Gajah, Melaka, Malaysia
| | - Chean Ring Leong
- Universiti Kuala Lumpur, Branch Campus Malaysian Institute of Chemical and Bioengineering Technology, Lot 1988 Kawasan Perindustrian Bandar Vendor, Taboh Naning, Alor Gajah, Melaka, Malaysia
| | - Islam H El Azab
- Department of Food Science and Nutrition, College of Science, Taif University, P.O. box 11099, Taif, 21944, Saudi Arabia
| | - Jun Wei Lim
- HICoE-Centre for Biofuel and Biochemical Research, Institute of Self Sustainable Building, Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS, Seri Iskandar, 32610, Perak Darul Ridzuan, Malaysia; Department of Biotechnology, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai, 602105, India
| | - M H H Mahmoud
- Department of Chemistry, College of Science, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia
| | - Daniel Joe Dailin
- Institute of Bioproduct Development, Universiti Teknologi Malaysia, Johor, Malaysia; Department of Bioprocess and Polymer Engineering, Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, Johor, Malaysia.
| | - Mohamed M Ibrahim
- Department of Chemistry, College of Science, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia
| | - Lai Fatt Chuah
- Faculty of Maritime Studies, Universiti Malaysia Terengganu, Terengganu, Malaysia.
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