1
|
Lima AR, Sammarro Silva KJ, Aguiar ASN, de Souza M, Lima THN, Blanco KC, Bagnato VS, Dias LD. Impact of PVC microplastics in photodynamic inactivation of Staphylococcus aureus and MRSA. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2024; 89:2105-2117. [PMID: 38678412 DOI: 10.2166/wst.2024.104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Accepted: 03/17/2024] [Indexed: 04/30/2024]
Abstract
Photodynamic processes have found widespread application in therapies. These processes involve photosensitizers (PSs) that, when excited by specific light wavelengths and in the presence of molecular oxygen, generate reactive oxygen species (ROS), that target cells leading to inactivation. Photodynamic action has gained notable attention in environmental applications, particularly against pathogens and antibiotic-resistant bacteria (ARB) that pose a significant challenge to public health. However, environmental matrices frequently encompass additional contaminants and interferents, including microplastics (MPs), which are pollutants of current concern. Their presence in water and effluents has been extensively documented, highlighting their impact on conventional treatment methods, but this information remains scarce in the context of photodynamic inactivation (PDI) setups. Here, we described the effects of polyvinyl chloride (PVC) microparticles in PDI targeting Staphylococcus aureus and its methicillin-resistant strain (MRSA), using curcumin as a PS under blue light. The presence of PVC microparticles does not hinder ROS formation; however, depending on its concentration, it can impact bacterial inactivation. Our results underscore that PDI remains a potent method for reducing bacterial concentrations in water and wastewater containing ARB, even in highly contaminated scenarios with MPs.
Collapse
Affiliation(s)
- Alessandra Ramos Lima
- Laboratory of Environmental Biophotonics, São Carlos Institute of Physics, University of São Paulo, São Carlos, SP, Brazil E-mail:
| | - Kamila Jessie Sammarro Silva
- Laboratory of Environmental Biophotonics, São Carlos Institute of Physics, University of São Paulo, São Carlos, SP, Brazil
| | - Antônio Sérgio Nakao Aguiar
- Grupo de Química Teórica e Estrutural de Anápolis, Universidade Estadual de Goiás, Anápolis, GO, Brazil; Laboratório de Novos Materiais, Universidade Evangélica de Goiás, Anápolis, GO, Brazil
| | - Mariana de Souza
- Laboratory of Environmental Biophotonics, São Carlos Institute of Physics, University of São Paulo, São Carlos, SP, Brazil
| | - Thalita Hellen Nunes Lima
- Laboratory of Environmental Biophotonics, São Carlos Institute of Physics, University of São Paulo, São Carlos, SP, Brazil
| | - Kate Cristina Blanco
- Laboratory of Environmental Biophotonics, São Carlos Institute of Physics, University of São Paulo, São Carlos, SP, Brazil
| | - Vanderlei Salvador Bagnato
- Laboratory of Environmental Biophotonics, São Carlos Institute of Physics, University of São Paulo, São Carlos, SP, Brazil; Department of Biomedical Engineering, Texas A&M University, College Station, TX, USA
| | - Lucas Danilo Dias
- Laboratório de Novos Materiais, Universidade Evangélica de Goiás, Anápolis, GO, Brazil
| |
Collapse
|
2
|
Anghelone M, Jembrih-Simbürger D, Schreiner M. Influence of phthalocyanine pigments on the photo-degradation of alkyd artists' paints under different conditions of artificial solar radiation. Polym Degrad Stab 2016. [DOI: 10.1016/j.polymdegradstab.2016.10.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
3
|
Fotopoulou KN, Karapanagioti HK. Surface properties of beached plastics. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:11022-32. [PMID: 25787219 DOI: 10.1007/s11356-015-4332-y] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Accepted: 03/05/2015] [Indexed: 05/20/2023]
Abstract
Studying plastic characteristics in the marine environment is important to better understand interaction between plastics and the environment. In the present study, high-density polyethylene (HDPE), polyethylene terephalate (PET), and polyvinyl chloride (PVC) samples were collected from the coastal environment in order to study their surface properties. Surface properties such as surface functional groups, surface topography, point of zero charge, and color change are important factors that change during degradation. Eroded HDPE demonstrated an altered surface topography and color and new functional groups. Eroded PET surface was uneven, yellow, and occasionally, colonized by microbes. A decrease in Fourier transform infrared (FTIR) peaks was observed for eroded PET suggesting that degradation had occurred. For eroded PVC, its surface became more lamellar and a new FTIR peak was observed. These surface properties were obtained due to degradation and could be used to explain the interaction between plastics, microbes, and pollutants.
Collapse
|
4
|
Silva M, Calvete MJF, Gonçalves NPF, Burrows HD, Sarakha M, Fernandes A, Ribeiro MF, Azenha ME, Pereira MM. Zinc(II) phthalocyanines immobilized in mesoporous silica Al-MCM-41 and their applications in photocatalytic degradation of pesticides. JOURNAL OF HAZARDOUS MATERIALS 2012; 233-234:79-88. [PMID: 22835771 DOI: 10.1016/j.jhazmat.2012.06.059] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2012] [Revised: 06/22/2012] [Accepted: 06/27/2012] [Indexed: 06/01/2023]
Abstract
In the present study the authors investigated a set of three new zinc(II) phthalocyanines (zinc(II) tetranitrophthalocyanine (ZnTNPc), zinc(II) tetra(phenyloxy)phthalocyanine (ZnTPhOPc) and the tetraiodide salt of zinc(II)tetra(N,N,N-trimethylaminoethyloxy) phthalocyaninate (ZnTTMAEOPcI)) immobilized into Al-MCM-41 prepared via ship-in-a-bottle methodology. The samples were fully characterized by diffuse reflectance-UV-vis spectroscopy (DRS-UV-vis), luminescence, thermogravimetric analysis (TG/DSC), N(2) adsorption techniques and elemental analysis. A comparative study was made on the photocatalytic performance upon irradiation within the wavelength range 320-460nm of these three systems in the degradation of pesticides fenamiphos and pentachlorophenol. ZnTNPc@Al-MCM-41 and ZnTTMAEOPcI@Al-MCM-41 were found to be the most active systems, with the best performance observed with the immobilized cationic phthalocyanine, ZnTTMAEOPcI@Al-MCM-41. This system showed high activity even after three photocatalytic cycles. LC-MS product characterization and mechanistic studies indicate that singlet oxygen ((1)O(2)), produced by excitation of these immobilized photosensitizers, is a key intermediate in the photocatalytic degradation of both pesticides.
Collapse
Affiliation(s)
- M Silva
- Departamento de Química, Universidade de Coimbra, Coimbra, Portugal
| | | | | | | | | | | | | | | | | |
Collapse
|
5
|
Fa W, Guo L, Wang J, Guo R, Zheng Z, Yang F. Solid-phase photocatalytic degradation of polystyrene with TiO2/Fe(St)3as catalyst. J Appl Polym Sci 2012. [DOI: 10.1002/app.37751] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|