1
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Pomata D, La Nasa J, Biale G, Barlucchi L, Ceccarini A, Di Filippo P, Riccardi C, Buiarelli F, Modugno F, Simonetti G. Plastic breath: Quantification of microplastics and polymer additives in airborne particles. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 932:173031. [PMID: 38723961 DOI: 10.1016/j.scitotenv.2024.173031] [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: 04/03/2024] [Revised: 05/02/2024] [Accepted: 05/05/2024] [Indexed: 05/12/2024]
Abstract
The widespread extensive use of synthetic polymers has led to a substantial environmental crisis caused by plastic pollution, with microplastics detected in various environments and posing risks to both human health and ecosystems. The possibility of plastic fragments to be dispersed in the air as particles and inhaled by humans may cause damage to the respiratory and other body systems. Therefore, there is a particular need to study microplastics as air pollutants. In this study, we tested a combination of analytical pyrolysis, gas chromatography-mass spectrometry, and gas and liquid chromatography-mass spectrometry to identify and quantify both microplastics and their additives in airborne particulate matter and settled dust within a workplace environment: a WEEE treatment plant. Using this combined approach, we were able to accurately quantify ten synthetic polymers and eight classes of polymer additives. The identified additives include phthalates, adipates, citrates, sebacates, trimellitates, benzoates, organophosphates, and newly developed brominated flame retardants.
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Affiliation(s)
- Donatella Pomata
- DIT, Italian Workers' Compensation Authority (INAIL), Rome, Italy
| | - Jacopo La Nasa
- Department of Chemistry and Industrial Chemistry, Pisa, Italy; CISUP Centre for Instrument Sharing, University of Pisa, Pisa, Italy.
| | - Greta Biale
- Department of Chemistry and Industrial Chemistry, Pisa, Italy
| | | | - Alessio Ceccarini
- Department of Chemistry and Industrial Chemistry, Pisa, Italy; CISUP Centre for Instrument Sharing, University of Pisa, Pisa, Italy
| | | | - Carmela Riccardi
- DIT, Italian Workers' Compensation Authority (INAIL), Rome, Italy
| | | | - Francesca Modugno
- Department of Chemistry and Industrial Chemistry, Pisa, Italy; CISUP Centre for Instrument Sharing, University of Pisa, Pisa, Italy
| | - Giulia Simonetti
- Department of Chemistry, Sapienza University of Rome, Rome, Italy
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2
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Costa CQV, Afonso II, Cruz J, Teodósio MAA, Jockusch S, Ramamurthy V, Power DM, Da Silva JP. Environmental Markers of Plastics and Microplastics. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:8889-8898. [PMID: 38685194 DOI: 10.1021/acs.est.3c09662] [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: 05/02/2024]
Abstract
The slow reaction rates to chemical and photochemical degradation are well-known properties of plastics. However, large plastic surfaces exposed to environmental conditions release particles and compounds that affect ecosystems and human health. The aim of this work was to identify compounds associated with the degradation of polyethylene (PE), polystyrene (PS), and polyvinyl chloride (PVC) microplastics (markers) on silica and sand and evaluate their use to screen microplastics on natural sand. Products were identified by using targeted and untargeted LC-HRMS analysis. All polymers underwent chemical oxidation on silica. PE released dicarboxylic acids (HO2C-(CH2)n-CO2H (n = 4-30), while PS released cis/trans-chalcone, trans-dypnone, 3-phenylpropiophenone, and dibenzoylmethane. PVC released dicarboxylic acids and aromatic compounds. Upon irradiation, PE was stable while PS released the same compounds as under chemical oxidation but at lower yields. Under the above condition, PVC generated HO2C-[CH2-CHCl]n-CH2-CO2H and HO2C-[CH2-CHCl]n-CO2H (n = 2-19) dicarboxylic acids. The same products were detected on sand but at a lower concentration than on silica due to better retention within the pores. Detection of markers of PE and PS on natural sand allowed us to screen microplastics by following a targeted analysis. Markers of PVC were not detected before or after thermal/photo-oxidation due to the low release of compounds and limitations associated with surface exposure/penetration of radiation.
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Affiliation(s)
- Camila Q V Costa
- Centre of Marine Sciences (CCMAR/CIMAR LA), University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal
| | - Inês I Afonso
- Centre of Marine Sciences (CCMAR/CIMAR LA), University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal
| | - Joana Cruz
- Centre of Marine Sciences (CCMAR/CIMAR LA), University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal
| | - Maria Alexandra A Teodósio
- Centre of Marine Sciences (CCMAR/CIMAR LA), University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal
| | - Steffen Jockusch
- Center for Photochemical Sciences, Bowling Green State University, Bowling Green, Ohio 43403, United States
| | | | - Deborah M Power
- Centre of Marine Sciences (CCMAR/CIMAR LA), University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal
| | - José P Da Silva
- Centre of Marine Sciences (CCMAR/CIMAR LA), University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal
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3
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Surana M, Pattanayak DS, Yadav V, Singh VK, Pal D. An insight decipher on photocatalytic degradation of microplastics: Mechanism, limitations, and future outlook. ENVIRONMENTAL RESEARCH 2024; 247:118268. [PMID: 38244970 DOI: 10.1016/j.envres.2024.118268] [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: 09/27/2023] [Revised: 01/15/2024] [Accepted: 01/18/2024] [Indexed: 01/22/2024]
Abstract
Plastic material manufacturing and buildup over the past 50 years has significantly increased pollution levels. Microplastics (MPs) and non-biodegradable residual plastic films have become the two most pressing environmental issues among the numerous types of plastic pollution. These tiny plastic flakes enter water systems from a variety of sources, contaminating the water. Since MPs can be consumed by people and aquatic species and eventually make their way into the food chain, their presence in the environment poses a serious concern. Traditional technologies can remove MPs to some extent, but their functional groups, stable covalent bonds, and hydrophobic nature make them difficult to eliminate completely. The urgent need to develop a sustainable solution to the worldwide contamination caused by MPs has led to the exploration of various techniques. Advanced oxidation processes (AOPs) such as photo-catalytic oxidation, photo-degradation, and electrochemical oxidation have been investigated. Among these, photocatalysis stands out as the most promising method for degrading MPs. Photocatalysis is an environmentally friendly process that utilizes light energy to facilitate a chemical reaction, breaking down MPs into carbon dioxide and water-soluble hydrocarbons under aqueous conditions. In photocatalysis, semiconductors act as photocatalysts by absorbing energy from a light source, becoming excited, and generating reactive oxygen species (ROS). These ROS, including hydroxyl radicals (•OH) and superoxide ions ( [Formula: see text] ), play a crucial role in the degradation of MPs. This extensive review provides a detailed exploration of the mechanisms and processes underlying the photocatalytic removal of MPs, emphasizing its potential as an efficient and environmentally friendly approach to address the issue of plastic pollution.
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Affiliation(s)
- Madhu Surana
- Department of Chemical Engineering, National Institute of Technology Raipur, Raipur, 492010, Chhattisgarh, India
| | - Dhruti Sundar Pattanayak
- Department of Chemical Engineering, National Institute of Technology Raipur, Raipur, 492010, Chhattisgarh, India
| | - Venkteshwar Yadav
- Department of Chemical Engineering, National Institute of Technology Raipur, Raipur, 492010, Chhattisgarh, India
| | - V K Singh
- Department of Chemical Engineering, National Institute of Technology Raipur, Raipur, 492010, Chhattisgarh, India
| | - Dharm Pal
- Department of Chemical Engineering, National Institute of Technology Raipur, Raipur, 492010, Chhattisgarh, India.
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4
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Maisto M, Ranauda MA, Zuzolo D, Tartaglia M, Postiglione A, Prigioniero A, Falzarano A, Scarano P, Castelvetro V, Corti A, Modugno F, La Nasa J, Biale G, Sciarrillo R, Guarino C. Effects of microplastics on microbial community dynamics in sediments from the Volturno River ecosystem, Italy. CHEMOSPHERE 2024; 349:140872. [PMID: 38056715 DOI: 10.1016/j.chemosphere.2023.140872] [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: 07/20/2023] [Revised: 11/27/2023] [Accepted: 11/30/2023] [Indexed: 12/08/2023]
Abstract
In this study, the sources, abundance, and ecological implications of microplastic (MP) pollution in Volturno, one of the main rivers in southern Italy, were explored by investigating the MP concentration levels in sediments collected along the watercourse. The samples were sieved through 5- and 2-mm sieves and treated with selective organic solvents. The polymer classes polystyrene (PS), polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polycarbonate (PC), nylon 6 (PA6), and nylon 6,6 (PA66) were quantified using pyrolysis-gas chromatography-mass spectrometry (Py-GC/MS) and high-performance liquid chromatography (HPLC). Furthermore, a 16S rRNA metagenomic analysis was performed using next-generation sequencing in Ion Torrent™ to explore the bacterial taxonomy and ecological dynamics of sediment samples. The MPs were detected in all samples collected from the study area. PP and PET were the most abundant and frequently detected polymer types in the analysed samples. The total MP concentration ranged from 1.05 to 14.55 ppm (parts per million), identifying two distinct data populations: high- and low-MP-contaminated sediments. According to the Polymer Hazard Index (PHI), MP pollution was categorised as hazard levels III and IV (corresponding to the danger category). Metagenomic data revealed that the presence of MPs significantly affected the abundance of bacterial taxa; Flavobacteraceae and Nocardiaceae, which are known to degrade polymeric substances, were present in high-MP-contaminated sediments. This study provides new insights into the ecological relevance of MP pollution and suggests that microorganisms may serve as biomarkers of MP pollution.
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Affiliation(s)
- Maria Maisto
- Department of Science and Technology, University of Sannio, Via de Sanctis Snc, 82100, Benevento, Italy
| | - Maria Antonietta Ranauda
- Department of Science and Technology, University of Sannio, Via de Sanctis Snc, 82100, Benevento, Italy
| | - Daniela Zuzolo
- Department of Science and Technology, University of Sannio, Via de Sanctis Snc, 82100, Benevento, Italy.
| | - Maria Tartaglia
- Department of Science and Technology, University of Sannio, Via de Sanctis Snc, 82100, Benevento, Italy
| | - Alessia Postiglione
- Department of Science and Technology, University of Sannio, Via de Sanctis Snc, 82100, Benevento, Italy
| | - Antonello Prigioniero
- Department of Science and Technology, University of Sannio, Via de Sanctis Snc, 82100, Benevento, Italy
| | - Alessandra Falzarano
- Department of Science and Technology, University of Sannio, Via de Sanctis Snc, 82100, Benevento, Italy
| | - Pierpaolo Scarano
- Department of Science and Technology, University of Sannio, Via de Sanctis Snc, 82100, Benevento, Italy
| | - Valter Castelvetro
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via Giuseppe Moruzzi, 13, 56124, Pisa, Italy
| | - Andrea Corti
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via Giuseppe Moruzzi, 13, 56124, Pisa, Italy
| | - Francesca Modugno
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via Giuseppe Moruzzi, 13, 56124, Pisa, Italy
| | - Jacopo La Nasa
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via Giuseppe Moruzzi, 13, 56124, Pisa, Italy
| | - Greta Biale
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via Giuseppe Moruzzi, 13, 56124, Pisa, Italy
| | - Rosaria Sciarrillo
- Department of Science and Technology, University of Sannio, Via de Sanctis Snc, 82100, Benevento, Italy
| | - Carmine Guarino
- Department of Science and Technology, University of Sannio, Via de Sanctis Snc, 82100, Benevento, Italy
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5
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Zhang Z, Zou S, Li P. Aging of plastics in aquatic environments: Pathways, environmental behavior, ecological impacts, analyses and quantifications. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 341:122926. [PMID: 37963513 DOI: 10.1016/j.envpol.2023.122926] [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: 09/21/2023] [Revised: 10/30/2023] [Accepted: 11/10/2023] [Indexed: 11/16/2023]
Abstract
The ubiquity of plastics in our environment has brought about pressing concerns, with their aging processes, photo-oxidation, mechanical abrasion, and biodegradation, being at the forefront. Microplastics (MPs), whether originating from plastic degradation or direct anthropogenic sources, further complicate this landscape. This review delves into the intricate aging dynamics of plastics in aquatic environments under various influential factors. We discuss the physicochemical changes that occur in aged plastics and the release of oxidation products during their degradation. Particular attention is given to their evolving environmental interactions and the resulting ecotoxicological implications. A rigorous evaluation is also conducted for methodologies in the analysis and quantification of plastics aging, identifying their merits and limitations and suggesting potential avenues for future research. This comprehensive review is able to illuminate the complexities of plastics aging, charting a path for future research and aiding in the formulation of informed policy decisions.
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Affiliation(s)
- Zekun Zhang
- School of Marine Sciences, Sun Yat-sen University, Zhuhai 519082, China
| | - Shichun Zou
- School of Marine Sciences, Sun Yat-sen University, Zhuhai 519082, China; Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Zhuhai 519082, China
| | - Pu Li
- School of Marine Sciences, Sun Yat-sen University, Zhuhai 519082, China; Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Zhuhai 519082, China.
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6
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Rubin AE, Gnaim R, Levi S, Zucker I. Risk assessment framework for microplastic in marine environments. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 901:166459. [PMID: 37607638 DOI: 10.1016/j.scitotenv.2023.166459] [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: 06/02/2023] [Revised: 07/30/2023] [Accepted: 08/18/2023] [Indexed: 08/24/2023]
Abstract
Constantly raising microplastic (MP) contamination of water sources poses a direct threat to the gentle balance of the marine environment. This study focuses on a multifactor hazard evaluation of conventional (polyethylene - PE, polypropylene - PP, and polystyrene - PS) and alternative (polyethylene terephthalate with 25 % or 50 % recycled material and polylactic acid) plastics. The risk assessment framework explored included MP abundance, water acidification potential, surface oxidation, fragmentation, and bacterial growth inhibition. Based on MP monitoring campaigns worldwide, we conclude that PE-based plastics are the most abundant MPs in water samples (comprise up to 82 % the MP in those samples). A year-long weathering experiment showed that PS-based and PP-based plastics were oxidized to a higher extent, resulting in the highest water acidification with pH reduction of up to three orders of magnitude. Finally, our laboratory experiments showed that weathered PS was the most fragile plastic during mechanical degradation, while both PP- and PS-based plastic extracts showed a significant growth inhibition toward the marine microorganisms (Bacillus sp. and Pseudoaltermonas sp). Using the examined factors as weighted inputs into our framework, this holistic evaluation of hazards suggest that PP-based plastic products were the most hazardous compared to the other conventional and alternative plastic types.
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Affiliation(s)
- Andrey Ethan Rubin
- Porter School of Earth and Environmental Studies, Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel
| | - Rima Gnaim
- Porter School of Earth and Environmental Studies, Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel; The Triangle Regional R&D Center (TRDC), Kfar Qari 30075, Israel
| | - Shiri Levi
- School of Mechanical Engineering, Faculty of Engineering, Tel Aviv University, Tel Aviv 69978, Israel
| | - Ines Zucker
- Porter School of Earth and Environmental Studies, Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel; School of Mechanical Engineering, Faculty of Engineering, Tel Aviv University, Tel Aviv 69978, Israel.
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7
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Schefer RB, Armanious A, Mitrano DM. Eco-Corona Formation on Plastics: Adsorption of Dissolved Organic Matter to Pristine and Photochemically Weathered Polymer Surfaces. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:14707-14716. [PMID: 37722069 DOI: 10.1021/acs.est.3c04180] [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: 09/20/2023]
Abstract
Plastic fate in freshwater systems is dependent on particle size, morphology, and physicochemical surface properties (e.g., charge, surface roughness, and hydrophobicity). Environmental aging processes, such as photochemical weathering and eco-corona formation due to dissolved organic matter (DOM) adsorption on plastic surfaces, can alter their physicochemical properties, affecting fate and transport. While plastic aging has been studied from a materials science perspective, its specific implications in environmental contexts remain less understood. Although photochemical weathering and eco-corona formation occur simultaneously in the environment, in this work, we systematically assessed the effects of photochemical weathering on the physicochemical properties of polymers (polyethylene, polypropylene, polyethylene terephthalate, and polystyrene) and how this influences the adsorption of DOMs (Suwannee River humic acid, fulvic acid, and natural organic matter) relative to pristine polymers. Pristine polymers initially had different and distinct physicochemical surface properties, but upon aging, they became more similar in terms of surface properties. Photochemical weathering resulted in a decrease in polymer film thickness, an increase in surface roughness, and hydrophilicity. DOM adlayers on the polymer surfaces resulted in more comparable wettability, effectively masking the initial polymer properties. Collectively, this study explores the physiochemical changes polymers undergo in laboratory studies mimicking environmental conditions. Understanding these changes is the initial step to rationalizing and predicting processes and interactions such as heteroaggregation that dictate the fate of plastics in the environment.
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Affiliation(s)
- Roman B Schefer
- Environmental Systems Science Department, ETH Zürich, Universitätstrasse 16, 8092 Zurich, Switzerland
| | - Antonius Armanious
- Department of Health Science and Technology, ETH Zürich, Universitätstrasse 2, 8092 Zurich, Switzerland
| | - Denise M Mitrano
- Environmental Systems Science Department, ETH Zürich, Universitätstrasse 16, 8092 Zurich, Switzerland
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8
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Huang Q, Pan L, Luo G, Jiang R, Ouyang G, Ye Y, Cai J, Guo P. Exploring the release of hazardous volatile organic compounds from face masks and their potential health risk. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 333:122042. [PMID: 37328128 DOI: 10.1016/j.envpol.2023.122042] [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: 04/03/2023] [Revised: 05/09/2023] [Accepted: 06/13/2023] [Indexed: 06/18/2023]
Abstract
Hazardous chemicals released from the petroleum-derived face mask can be inhaled by wearers and cause adverse health effects. Here, we first used headspace solid-phase microextraction coupled with GC-MS to comprehensively analyze the volatile organic compounds (VOCs) released from 26 types of face masks. The results showed that total concentrations and peak numbers ranged from 3.28 to 197 μg/mask and 81 to 162, respectively, for different types of mask. Also, light exposure could affect the chemical composition of VOCs, particularly increasing the concentrations of aldehydes, ketones, organic acids and esters. Of these detected VOCs, 142 substances were matched to a reported database of chemicals associated with plastic packaging; 30 substances were identified by the International Agency for Research on Cancer (IARC) as potential carcinogenic to humans; 6 substances were classified in the European Union as persistent, bioaccumulative, and toxic, or very persistent, very bioaccumulative substance. Reactive carbonyls were ubiquitous in masks, especially after exposure to light. The potential risk of VOCs released from the face masks were then accessed by assuming the extreme scenario that all the VOC residues were released into the breathing air within 3 h. The result showed that the average total concentration of VOCs (17 μg/m3) was below the criterion for hygienic air, but seven substances, 2-ethylhexan-1-ol, benzene, isophorone, heptanal, naphthalene, benzyl chloride, and 1,2-dichloropropane exceeded the non-cancer health guidelines for lifetime exposure. This finding suggested that specific regulations should be adopted to improve the chemical safety of face masks.
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Affiliation(s)
- Qi Huang
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou, 511443, China
| | - Li Pan
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou, 511443, China
| | - Gan Luo
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou, 511443, China
| | - Ruifen Jiang
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou, 511443, China; Guangdong Provincial Key Laboratory of Chemical Measurement and Emergency Test Technology, Guangdong Provincial Engineering Research Center for Ambient Mass Spectrometry, Institute of Analysis, Guangdong Academy of Sciences (China National Analytical Center, Guangzhou), Guangzhou, 510070, China.
| | - Gangfeng Ouyang
- Guangdong Provincial Key Laboratory of Chemical Measurement and Emergency Test Technology, Guangdong Provincial Engineering Research Center for Ambient Mass Spectrometry, Institute of Analysis, Guangdong Academy of Sciences (China National Analytical Center, Guangzhou), Guangzhou, 510070, China; KLGHEI of Environment and Energy Chemistry, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, China
| | - Yuanjian Ye
- Guangzhou Quality Supervision and Testing Institute, Guangzhou, 511400, China
| | - Jin'an Cai
- Guangzhou Quality Supervision and Testing Institute, Guangzhou, 511400, China
| | - Pengran Guo
- Guangdong Provincial Key Laboratory of Chemical Measurement and Emergency Test Technology, Guangdong Provincial Engineering Research Center for Ambient Mass Spectrometry, Institute of Analysis, Guangdong Academy of Sciences (China National Analytical Center, Guangzhou), Guangzhou, 510070, China
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9
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Laganà A, Visalli G, Facciolà A, Celesti C, Iannazzo D, Di Pietro A. Uptake of Breathable Nano- and Micro-Sized Polystyrene Particles: Comparison of Virgin and Oxidised nPS/mPS in Human Alveolar Cells. TOXICS 2023; 11:686. [PMID: 37624191 PMCID: PMC10459673 DOI: 10.3390/toxics11080686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 08/03/2023] [Accepted: 08/07/2023] [Indexed: 08/26/2023]
Abstract
Airborne micro- and nanoplastics are widely spread and pose a risk to human health. The third polymer plastic most commonly produced and present in atmospheric fallout is polystyrene (PS). For these reasons and for a more realistic assessment of biological effects, we examined in-home oxidised (ox-, simulating photoaging) nPS/mPS (0.1 and 1 μm), comparing the effects with virgin ones (v-). On human alveolar cells (A549), we quantified the cellular uptake, using FITC-functionalised nPS/mPS, while cytotoxicity, changes in the acidic compartment, ROS production, mitochondrial function, and DNA damage were assessed to study the effects of internalised v- and ox-nPS/mPS. The results showed that the uptake was dose-dependent and very fast (1 h), since, at the lowest dose (1.25 µg/well), it was 20.8% and 21.8% of nPS and mPS, respectively. Compared to v-, significant ROS increases, DNA damage, and mitochondrial impairment were observed after exposure to ox-nPS/mPS. The enhancement of effects due to environmental aging processes highlighted the true potential impact on human health of these airborne pollutants.
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Affiliation(s)
- Antonio Laganà
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, 98125 Messina, Italy; (A.L.); (G.V.); (A.F.)
- Istituto Clinico Polispecialistico C.O.T., Cure Ortopediche Traumatologiche s.p.a., 98124 Messina, Italy
| | - Giuseppa Visalli
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, 98125 Messina, Italy; (A.L.); (G.V.); (A.F.)
| | - Alessio Facciolà
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, 98125 Messina, Italy; (A.L.); (G.V.); (A.F.)
| | - Consuelo Celesti
- Department of Electronic Engineering, Industrial Chemistry and Engineering, University of Messina, 98125 Messina, Italy; (C.C.); (D.I.)
| | - Daniela Iannazzo
- Department of Electronic Engineering, Industrial Chemistry and Engineering, University of Messina, 98125 Messina, Italy; (C.C.); (D.I.)
| | - Angela Di Pietro
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, 98125 Messina, Italy; (A.L.); (G.V.); (A.F.)
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10
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Corti A, La Nasa J, Biale G, Ceccarini A, Manariti A, Petri F, Modugno F, Castelvetro V. Microplastic pollution in the sediments of interconnected lakebed, seabed, and seashore aquatic environments: polymer-specific total mass through the multianalytical "PISA" procedure. Anal Bioanal Chem 2023:10.1007/s00216-023-04664-0. [PMID: 37071143 DOI: 10.1007/s00216-023-04664-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 03/15/2023] [Accepted: 03/20/2023] [Indexed: 04/19/2023]
Abstract
The total mass of individual synthetic polymers present as microplastic (MP < 2 mm) pollutants in the sediments of interconnected aquatic environments was determined adopting the Polymer Identification and Specific Analysis (PISA) procedure. The investigated area includes a coastal lakebed (Massaciuccoli), a coastal seabed (Serchio River estuarine), and a sandy beach (Lecciona), all within a natural park area in Tuscany (Italy). Polyolefins, poly(styrene) (PS), poly(vinyl chloride) (PVC), polycarbonate (PC), poly(ethylene terephthalate) (PET), and the polyamides poly(caprolactame) (Nylon 6) and poly(hexamethylene adipamide) (Nylon 6,6) were fractionated and quantified through a sequence of selective solvent extractions followed by either analytical pyrolysis or reversed-phase HPLC analysis of the products of hydrolytic depolymerizations under acidic and alkaline conditions. The highest concentrations of polyolefins (highly degraded, up to 864 µg/kg of dry sediment) and PS (up to 1138 µg/kg) MPs were found in the beach dune sector, where larger plastic debris are not removed by the cyclic swash action and are thus prone to further aging and fragmentation. Surprisingly, low concentrations of less degraded polyolefins (around 30 µg/kg) were found throughout the transect zones of the beach. Positive correlation was found between polar polymers (PVC, PC) and phthalates, most likely absorbed from polluted environments. PET and nylons above their respective LOQ values were found in the lakebed and estuarine seabed hot spots. The pollution levels suggest a significant contribution from riverine and canalized surface waters collecting urban (treated) wastewaters and waters from Serchio River and the much larger Arno River aquifers, characterized by a high anthropogenic pressure.
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Affiliation(s)
- Andrea Corti
- Department of Chemistry and Industrial Chemistry, University of Pisa, 56124, Pisa, Italy
- CISUP - Center for the Integration of Scientific Instruments of the University of Pisa, University of Pisa, 56124, Pisa, Italy
| | - Jacopo La Nasa
- Department of Chemistry and Industrial Chemistry, University of Pisa, 56124, Pisa, Italy
- CISUP - Center for the Integration of Scientific Instruments of the University of Pisa, University of Pisa, 56124, Pisa, Italy
| | - Greta Biale
- Department of Chemistry and Industrial Chemistry, University of Pisa, 56124, Pisa, Italy
| | - Alessio Ceccarini
- Department of Chemistry and Industrial Chemistry, University of Pisa, 56124, Pisa, Italy
- CISUP - Center for the Integration of Scientific Instruments of the University of Pisa, University of Pisa, 56124, Pisa, Italy
| | - Antonella Manariti
- Department of Chemistry and Industrial Chemistry, University of Pisa, 56124, Pisa, Italy
- CISUP - Center for the Integration of Scientific Instruments of the University of Pisa, University of Pisa, 56124, Pisa, Italy
| | - Filippo Petri
- Department of Chemistry and Industrial Chemistry, University of Pisa, 56124, Pisa, Italy
| | - Francesca Modugno
- Department of Chemistry and Industrial Chemistry, University of Pisa, 56124, Pisa, Italy
- CISUP - Center for the Integration of Scientific Instruments of the University of Pisa, University of Pisa, 56124, Pisa, Italy
| | - Valter Castelvetro
- Department of Chemistry and Industrial Chemistry, University of Pisa, 56124, Pisa, Italy.
- CISUP - Center for the Integration of Scientific Instruments of the University of Pisa, University of Pisa, 56124, Pisa, Italy.
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11
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Visalli G, Laganà A, Facciolà A, Iaconis A, Curcio J, Pollino S, Celesti C, Scalese S, Libertino S, Iannazzo D, Di Pietro A. Enhancement of biological effects of oxidised nano- and microplastics in human professional phagocytes. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2023; 99:104086. [PMID: 36842547 DOI: 10.1016/j.etap.2023.104086] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 01/24/2023] [Accepted: 02/22/2023] [Indexed: 06/18/2023]
Abstract
Micro and nanoplastics are ubiquitous pollutants that can cause adverse health effects even in humans. Effects of virgin and oxidised (simulating the aging processes) polystyrene nano (nPS) and micro particles (mPS) with diameters of 0.1 and 1 µm were studied on human professional phagocytes (i.e., monocyte cells THP-1 and macrophage-like mTHP-1 cells). After characterization by ATR-FTIR, UV-Vis spectroscopy, SEM and dynamic light-scattering analyses, the particles were FITC functionalised to quantify cellular uptake. Changes in the cell compartments were studied by acrydine orange and the pro-oxidant, cytotoxic and genotoxic effects were assessed. Phagocytosis was dose- and time- dependent and at 24 h 52% of nPS and 58% of mPS were engulfed. Despite the high homeostasis of professional phagocytes, significant ROS increases and DNA damage were observed after exposure to oxidised particles. The results highlight that the environmental aging processes enhances the adverse health effects of micro and nanoplastics.
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Affiliation(s)
- Giuseppa Visalli
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, 98125 Messina, Italy
| | - Antonio Laganà
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, 98125 Messina, Italy; Istituto Clinico Polispecialistico C.O.T. Cure Ortopediche Traumatologiche s.p.a., 98124 Messina, Italy
| | - Alessio Facciolà
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, 98125 Messina, Italy
| | - Antonella Iaconis
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, 98125 Messina, Italy
| | - Jessica Curcio
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, 98125 Messina, Italy
| | - Santa Pollino
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, 98125 Messina, Italy
| | - Consuelo Celesti
- Department of Electronic Engineering, Industrial Chemistry and Engineering, University of Messina, 98125 Messina, Italy
| | - Silvia Scalese
- Istituto per la Microelettronica e Microsistemi, Consiglio Nazionale delle Ricerche (CNR-IMM), Ottava Strada n.5, I-95121 Catania, Italy
| | - Sebania Libertino
- Istituto per la Microelettronica e Microsistemi, Consiglio Nazionale delle Ricerche (CNR-IMM), Ottava Strada n.5, I-95121 Catania, Italy
| | - Daniela Iannazzo
- Department of Electronic Engineering, Industrial Chemistry and Engineering, University of Messina, 98125 Messina, Italy
| | - Angela Di Pietro
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, 98125 Messina, Italy.
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12
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Mouchati A, Yagoubi N. Mechanical Performance and Cytotoxicity of an Alginate/Polyacrylamide Bipolymer Network Developed for Medical Applications. MATERIALS (BASEL, SWITZERLAND) 2023; 16:1789. [PMID: 36902903 PMCID: PMC10004427 DOI: 10.3390/ma16051789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 01/10/2023] [Accepted: 01/31/2023] [Indexed: 06/18/2023]
Abstract
Several hydrogels could be used as scaffolds for tissue engineering and a model of extracellular matrices for biological studies. However, the scope of alginate in medical applications is often severely limited by its mechanical behavior. In the present study, the modification of the mechanical properties of the alginate scaffold is obtained by its combination with polyacrylamide in order to obtain a multifunctional biomaterial. The advantage of this double polymer network is due to an improvement in the mechanical strength with regard to the alginate alone, and in particular, its Young's modulus values. The morphological study of this network was carried out by scanning electron microscopy (SEM). The swelling properties were also studied over several time intervals. In addition to mechanical property requirements, these polymers must meet several biosafety parameters as part of an overall risk management strategy. Our preliminary study illustrates that the mechanical property of this synthetic scaffold depends on the ratio of the two polymers (alginate, polyacrylamide) which allows us to choose the appropriate ratio to mimic replaceable body tissue and be used in various biological and medical uses, including 3D cell culture, tissue engineering, and protection against local shocks.
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13
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Groh KJ, Arp HPH, MacLeod M, Wang Z. Assessing and managing environmental hazards of polymers: historical development, science advances and policy options. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2023; 25:10-25. [PMID: 36511246 DOI: 10.1039/d2em00386d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Polymers are the main constituents of many materials and products in our modern world. However, their environmental safety is not assessed with the same level of detail as done for non-polymeric chemical substances. Moreover, the fundamentals of contemporary regulatory approaches for polymers were developed in the early 1990s, with little change occurring since then. Currently, the European Commission is working on a proposal to initiate registration of polymers under the European Union's (EU) chemicals legislation REACH. This provides a unique opportunity for regulation to catch up on recent scientific advances. To inform this process, we here critically appraise the suggested regulatory approaches to the environmental assessment and management of polymers against the latest scientific findings regarding their environmental fate, exposure, and effects, and identify the remaining critical knowledge gaps. While we use the EU draft proposal as an example, our findings are broadly applicable to other polymer legislations worldwide, due to the similarity of polymer assessment criteria being used. We emphasize four major aspects that require more attention in the regulation of polymers: (i) increased transparency about chemical identities, physical characteristics and grouping approaches for in-use polymers; (ii) improved understanding of the environmental fate of polymers and materials composed of polymers across size and density categories and exposure profiles; (iii) comprehensive assessment of the environmental hazards of polymers, considering the effects of degradation and weathering and taking into account the actual uptake, long-term toxicity, and geophysical impacts; and (iv) consideration of the production volume and use/release patterns in determining regulatory data and testing requirements. Transitioning toward a toxic-free and sustainable circular economy will likely require additional policy instruments that will reduce the overall complexity and diversity of in-use polymers and polymeric materials.
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Affiliation(s)
- Ksenia J Groh
- Eawag, Swiss Federal Institute of Aquatic Science and Technology, 8600 Dübendorf, Switzerland.
| | - Hans Peter H Arp
- Department of Environmental Engineering, Norwegian Geotechnical Institute, NO-0806 Oslo, Norway
- Department of Chemistry, Norwegian University of Science and Technology (NTNU), NO-7491 Trondheim, Norway
| | - Matthew MacLeod
- Department of Environmental Science, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Zhanyun Wang
- Empa - Swiss Federal Laboratories for Materials Science and Technology, Technology and Society Laboratory, 9014 St. Gallen, Switzerland.
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14
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Rizwan K, Bilal M. Developments in advanced oxidation processes for removal of microplastics from aqueous matrices. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:86933-86953. [PMID: 36279055 DOI: 10.1007/s11356-022-23545-0] [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: 07/05/2022] [Accepted: 10/06/2022] [Indexed: 06/16/2023]
Abstract
Continuous incorporation of microplastics (MPs) and their fragmented residues into the ecosystem has sparked significant scientific apprehensions about persistence, a multitude of sources, and toxicity impacts on human health and aquatic entities. Overcoming this multifaceted hazard necessitates the development of novel techniques with robust efficiencies to eliminate microplastics from the environmental compartments. Coagulation, flocculation, and membrane filtration are non-destructive techniques but necessitate extra steps for microplastic degradation, whereas biological means have been confirmed less efficient (less than 15% degradation). Recent reports have emphasized advanced oxidation processes (AOPs) as practical treatment alternatives, representing superior catalytic efficacy for microplastic degradation (≈30-95%). Nevertheless, additional investigations should be carried out to evaluate the performance of AOPs in degrading microplastics under real environmental matrices. Moreover, the detection of transformed metabolites, degradation mechanistic insights, and toxicity bioassays are required to substantiate AOP assumption as feasible remediation substitutes. This review focuses on the source, occurrence, discharge, transportation, and associated paramount health risks of microplastics. Advanced oxidation processes-assisted removal of microplastics from the aqueous matrices is thoroughly vetted with up-to-date findings. Factors affecting the degradation of MPs have been discussed in detail. In addition to the generalized mechanistic insights into photocatalytic degradation, the risk assessment of aging intermediates is also comprehended. Finally, the review was concluded by emphasizing current research gaps and incoming research tendencies to provide guidelines for efficiently addressing microplastic pollution.
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Affiliation(s)
- Komal Rizwan
- Department of Chemistry, University of Sahiwal, Sahiwal, 57000, Pakistan.
| | - Muhammad Bilal
- Institute of Chemical Technology and Engineering, Faculty of Chemical Technology, Poznan University of Technology, Berdychowo 4, Ponzan, PL-60695, Poland
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15
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Padermshoke A, Kajiwara T, An Y, Takigawa M, Van Nguyen T, Masunaga H, Kobayashi Y, Ito H, Sasaki S, Takahara A. Characterization of photo-oxidative degradation process of polyolefins containing oxo-biodegradable additives. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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16
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Censi V, Saiano F, Bongiorno D, Indelicato S, Napoli A, Piazzese D. Bioplastics: A new analytical challenge. Front Chem 2022; 10:971792. [PMID: 36212056 PMCID: PMC9538493 DOI: 10.3389/fchem.2022.971792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 09/08/2022] [Indexed: 12/01/2022] Open
Abstract
Even though petroleum-based plastics are advantageous in complying with the performance requirements in many applications, these are related, throughout their life cycle, to several environmental problems, including greenhouse gas emissions and persistence in marine and terrestrial environments. Therefore, the preservation of natural resources and climate change is considered worldwide, the main reason for which is necessary to reduce consumption and dependence on fossil-based materials. Biopolymers (PLA, PHAs, etc.) are examples of plastics whose use is grown exponentially over the years because of the improvements of their physical and mechanical properties using additives of various nature and depending on the scope of application. This review aims to discuss various ways of biopolymer degradation, to evaluate if they represent a new Frontier in eco-sustainability or rather a re-proposal of old problems. Related to this topic, we also have focussed our attention on the different methods for the quantitative analysis of bioplastics, or their degradation by-products, comparing and evaluating the advantages and disadvantages of each technique.
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Affiliation(s)
- Valentina Censi
- Department of Earth and Marine Sciences, University of Palermo, Palermo, Italy
| | - Filippo Saiano
- Department Agricultural Food and Forestry Sciences, University of Palermo, Palermo, Italy
| | - David Bongiorno
- Department of Biological, Chemical and Pharmaceutical Science and Technology (STEBICEF), University of Palermo, Palermo, Italy
| | - Serena Indelicato
- Department of Biological, Chemical and Pharmaceutical Science and Technology (STEBICEF), University of Palermo, Palermo, Italy
| | - Anna Napoli
- Department of Chemistry and Chemical Technologies, University of Calabria, Arcavacata di Rende (CS), Italy
| | - Daniela Piazzese
- Department of Earth and Marine Sciences, University of Palermo, Palermo, Italy
- *Correspondence: Daniela Piazzese,
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17
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Menicagli V, Balestri E, Biale G, Corti A, La Nasa J, Modugno F, Castelvetro V, Lardicci C. Leached degradation products from beached microplastics: A potential threat to coastal dune plants. CHEMOSPHERE 2022; 303:135287. [PMID: 35690174 DOI: 10.1016/j.chemosphere.2022.135287] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 06/06/2022] [Accepted: 06/07/2022] [Indexed: 06/15/2023]
Abstract
Plants play a fundamental role in maintaining coastal dunes but also accumulate littered microplastics (MPs). Migration tests suggest that naturally weathered MPs can leach out a broader range of potentially phytotoxic chemicals than virgin MPs. Thus, assessing MPs effects on plants using beached-collected particles rather than virgin ones is critically important. Here, the effects on plants of leachates from two pools of beach-collected and virgin MPs, high-density polyethylene (HDPE) and polypropylene (PP), and their mixture, were explored combining toxicity tests and chemical analyses. Phytotoxicity of MP leachates at different dilutions was evaluated under standard laboratory conditions using test species and under environmentally realistic conditions using the dune species Thinopyrum junceum. Leachates from beached PP and HDPE adversely affected all species, and the extent of these effects varied according to polymer type, concentration, and species. Virgin MPs had weaker effects than beached ones. Several potentially phytotoxic oxidized compounds were detected in water by GC/MS analysis, and their amount estimated. Results indicate that the molecular species leaching from beached MPs - at ppm concentration levels for the individual chemical species - can inhibit plant growth, and the effects of leachates from mixtures of degraded MPs can differ from those from individual polymers, highlighting the need for further investigation of MPs consequences for coastal ecosystems.
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Affiliation(s)
- Virginia Menicagli
- Department of Biology, University of Pisa, Via Derna 1, Pisa, Italy; Center for the Integration of Scientific Instruments of the University of Pisa (CISUP), Via S. Maria 53, Pisa, Italy
| | - Elena Balestri
- Department of Biology, University of Pisa, Via Derna 1, Pisa, Italy.
| | - Greta Biale
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via Giuseppe Moruzzi 13, Pisa, Italy
| | - Andrea Corti
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via Giuseppe Moruzzi 13, Pisa, Italy
| | - Jacopo La Nasa
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via Giuseppe Moruzzi 13, Pisa, Italy
| | - Francesca Modugno
- Center for the Integration of Scientific Instruments of the University of Pisa (CISUP), Via S. Maria 53, Pisa, Italy; Department of Chemistry and Industrial Chemistry, University of Pisa, Via Giuseppe Moruzzi 13, Pisa, Italy
| | - Valter Castelvetro
- Center for the Integration of Scientific Instruments of the University of Pisa (CISUP), Via S. Maria 53, Pisa, Italy; Department of Chemistry and Industrial Chemistry, University of Pisa, Via Giuseppe Moruzzi 13, Pisa, Italy
| | - Claudio Lardicci
- Center for the Integration of Scientific Instruments of the University of Pisa (CISUP), Via S. Maria 53, Pisa, Italy; Department of Earth Sciences, University of Pisa, Via S. Maria 53, Pisa, Italy; Center for Climate Change Impact, University of Pisa, Via Del Borghetto 80, Pisa, Italy
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18
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Yang Y, Chen J, Chen Z, Yu Z, Xue J, Luan T, Chen S, Zhou S. Mechanisms of polystyrene microplastic degradation by the microbially driven Fenton reaction. WATER RESEARCH 2022; 223:118979. [PMID: 35994787 DOI: 10.1016/j.watres.2022.118979] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 08/08/2022] [Accepted: 08/12/2022] [Indexed: 06/15/2023]
Abstract
Natural hydroxyl radical (·OH) production, which partially occurs through the microbially driven Fenton reaction, can enhance the degradation of polystyrene microplastics (PS-MPs). However, ·OH causes damage to microorganisms, which might in turn restrain the microbially driven Fenton reaction. Thus, whether PS-MPs can be continuously degraded by the microbially driven Fenton reaction and how they are degraded are still unknown. A pure-culture system using Shewanella putrefaciens 200 was set up to explore the effect and mechanism of microbially driven Fenton reaction on PS-MP degradation. In a 14-day operation, ·OH produced by the microbially driven Fenton reaction could degrade PS-MPs with a weight loss of 6.1 ± 0.6% and an O/C ratio of 0.6 (v.s. 0.6 ± 0.1% and 0.1, respectively, in the ·OH quenched group). Benzene ring derivatives such as 2-isopropyl-5-methyl-1-heptanol and nonahexacontanoic acid were the main soluble products of PS-MP degradation. The ·OH-induced oxidative damage on microorganisms did not affect ·OH production significantly when there was timely replenishment of organic carbon sources to promote reproduction of microorganisms. Thus, PS-MPs can be continuously degraded by microbially driven Fenton reactions in natural alternating anaerobic-aerobic environments. This study also provides a new microbial technique for MP degradation that is different from previous technologies based on microbial plastic-degrading enzymes.
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Affiliation(s)
- Yuting Yang
- Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, China; Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory 7 (Rongjiang Laboratory), Jieyang 515200, China; Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Jin Chen
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Zhi Chen
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Zhen Yu
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
| | - Jingchuan Xue
- Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, China
| | - Tiangang Luan
- Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, China; Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory 7 (Rongjiang Laboratory), Jieyang 515200, China
| | - Shanshan Chen
- Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, China; Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory 7 (Rongjiang Laboratory), Jieyang 515200, China; Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Shungui Zhou
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
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19
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Albignac M, Ghiglione JF, Labrune C, Ter Halle A. Determination of the microplastic content in Mediterranean benthic macrofauna by pyrolysis-gas chromatography-tandem mass spectrometry. MARINE POLLUTION BULLETIN 2022; 181:113882. [PMID: 35816819 DOI: 10.1016/j.marpolbul.2022.113882] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 06/20/2022] [Accepted: 06/21/2022] [Indexed: 06/15/2023]
Abstract
The Mediterranean Sea water bodies are ones of the most polluted, especially with microplastics. As the seafloor is the ultimate sink for litter, it is considered a hotspot for microplastic pollution. We provide an original analytical development based on the coupling of tandem mass spectrometry to pyrolysis-gas chromatography to improve the detection of plastic contamination in marine organisms. Due to the high selectivity of the mass spectrometer, a straightforward sample preparation consists uniquely of potassium hydroxide digestion. The quantification of six common polymers is possible in one run. The method was applied to analyze the plastic content from 500 μm down to 0.7 μm in the whole body of seven benthic species with variable feeding modes. Plastic was detected in all samples, with an almost systematic detection of polypropylene and polyethylene. Our method presents a major development in determining the levels of plastic contaminations in samples with rich organic matter content.
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Affiliation(s)
- Magali Albignac
- CNRS, Université de Toulouse, Laboratoire des Interactions Moléculaires et Réactivité Chimique et Photochimique (IMRCP), UMR 5623, Toulouse, France
| | - Jean François Ghiglione
- CNRS, Sorbonne Université, Laboratoire d'Océanographie Microbienne (LOMIC), UMR 7621, Observatoire Océanologique de Banyuls, Banyuls sur mer, France
| | - Céline Labrune
- CNRS, Sorbonne Université, Laboratoire d'Ecogéochimie des Environnements Benthiques (LECOB), UMR 8222, Observatoire Océanologique de Banyuls, Banyuls sur mer, France
| | - Alexandra Ter Halle
- CNRS, Université de Toulouse, Laboratoire des Interactions Moléculaires et Réactivité Chimique et Photochimique (IMRCP), UMR 5623, Toulouse, France.
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20
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Biale G, La Nasa J, Mattonai M, Corti A, Castelvetro V, Modugno F. Seeping plastics: Potentially harmful molecular fragments leaching out from microplastics during accelerated ageing in seawater. WATER RESEARCH 2022; 219:118521. [PMID: 35526427 DOI: 10.1016/j.watres.2022.118521] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 04/21/2022] [Accepted: 04/26/2022] [Indexed: 06/14/2023]
Abstract
Microplastics are the particulate plastic debris found almost everywhere as environmental contaminants. They are not chemically stable persistent pollutants, but reactive materials. In fact, synthetic polymers exposed to the environment undergo chemical and physical degradation processes which lead not only to mechanical but also molecular fragmentation, releasing compounds that are potentially harmful for the environment and human health. We carried out accelerated photo-oxidative ageing of four reference microplastics (low- and high-density polyethylene, polypropylene, and polystyrene) directly in artificial seawater. We then made a characterization at the molecular level along with a quantification of the chemical species leached into water. Gas chromatography/mass spectrometry analyses performed after selective extraction and derivatization enabled us to identify more than 60 different compounds. Analysis of the leachates from the three polyolefins revealed that the main degradation products were mono- and dicarboxylic acids, along with linear and branched hydroxy acids. The highest amount of leached degradation species was observed for polystyrene, with benzoic acid and phenol derivatives as the most abundant, along with oligomeric styrene derivatives. The results from reference microplastics were then compared with those obtained by analyzing leachates in artificial seawater from aged plastic debris collected in a natural environment. The differences observed between the reference and the environmental plastic leachates mainly concerned the relative abundances of the chemical species detected, with the environmental samples showing higher amounts of dicarboxylic acids and oxidized species.
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Affiliation(s)
- Greta Biale
- Department of Chemistry and Industrial Chemistry, University of Pisa, Pisa, Italy
| | - Jacopo La Nasa
- Department of Chemistry and Industrial Chemistry, University of Pisa, Pisa, Italy; National Interuniversity Consortium of Materials Science and Technology (INSTM), Florence, Italy.
| | - Marco Mattonai
- Department of Chemistry and Industrial Chemistry, University of Pisa, Pisa, Italy
| | - Andrea Corti
- Department of Chemistry and Industrial Chemistry, University of Pisa, Pisa, Italy; CISUP Center for the Integration of Scientific Instruments of the University of Pisa, Pisa, Italy
| | - Valter Castelvetro
- Department of Chemistry and Industrial Chemistry, University of Pisa, Pisa, Italy; CISUP Center for the Integration of Scientific Instruments of the University of Pisa, Pisa, Italy
| | - Francesca Modugno
- Department of Chemistry and Industrial Chemistry, University of Pisa, Pisa, Italy; CISUP Center for the Integration of Scientific Instruments of the University of Pisa, Pisa, Italy
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21
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Research on the Mechanical Properties and Stretch Forming Simulation of Triaxial Geogrid with Different Pre-Punched Hole Diameters. Polymers (Basel) 2022; 14:polym14132594. [PMID: 35808640 PMCID: PMC9269259 DOI: 10.3390/polym14132594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 06/05/2022] [Accepted: 06/17/2022] [Indexed: 11/17/2022] Open
Abstract
In this paper, the tensile behavior of industrial polypropylene triaxial geogrid with different pre-punched hole diameters was studied by experiment and numerical analysis. The industrial polypropylene sheets with different diameters of circular holes were stretched at elevated temperature and then the tensile properties of triaxial geogrids at room temperature were evaluated. It was found that the pre-punched hole diameter of triaxial geogrid had a very close relationship with the mechanical properties. With the increase of the pre-punched hole diameter, the tensile strength of triaxial geogrid shows a trend of first increasing and then decreasing. Combined with numerical simulation, the optimal pre-punched hole diameter can be accurately obtained, and the distribution law of the width, thickness, stress, and strain of triaxial geogrid can be obtained. Under the condition of a stretching ratio of 3 and node spacing of 3 mm, it was found that the mechanical properties of industrial polypropylene triaxial geogrid was the best when the pre-punched hole diameter was 2.6 mm.
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22
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Menzel T, Meides N, Mauel A, Mansfeld U, Kretschmer W, Kuhn M, Herzig EM, Altstädt V, Strohriegl P, Senker J, Ruckdäschel H. Degradation of low-density polyethylene to nanoplastic particles by accelerated weathering. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 826:154035. [PMID: 35217061 DOI: 10.1016/j.scitotenv.2022.154035] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 01/25/2022] [Accepted: 02/16/2022] [Indexed: 06/14/2023]
Abstract
When plastics enter the environment, they are exposed to abiotic and biotic impacts, resulting in degradation and the formation of micro- and nanoplastic. Microplastic is ubiquitous in every environmental compartment. Nevertheless, the underlying degradation processes are not yet fully understood. Here, we studied the abiotic degradation of commonly used semi-crystalline, low-density polyethylene (LDPE) in a long-term accelerated weathering experiment combining several macro- and microscopic methods. Based on our observations, the degradation of LDPE proceeds in three stages. Initially, LDPE objects are prone to abrasion, followed by a period of surface cracking. A large number of secondary particles with a high degree of crystallinity are formed, with sizes down to the nanometer scale. These particles consist of highly polar oligomers leading to agglomeration in the final stage. We therefore suppose that weathered microplastic and nanoplastic particles will attach to colloidal environmental matter. This offers an explanation for the absence of free nanoplastic particles in natural samples.
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Affiliation(s)
- Teresa Menzel
- Department of Polymer Engineering, University of Bayreuth, Universitätsstraße 30, 95447 Bayreuth, Germany
| | - Nora Meides
- Department of Macromolecular Chemistry I, University of Bayreuth, Universitätsstraße 30, 95447 Bayreuth, Germany
| | - Anika Mauel
- Department of Inorganic Chemistry III, University of Bayreuth, Universitätsstraße 30, 95447 Bayreuth, Germany
| | - Ulrich Mansfeld
- Bavarian Polymer Institute, University of Bayreuth, Universitätsstraße 30, 95447 Bayreuth, Germany
| | - Winfried Kretschmer
- Department of Inorganic Chemistry II, University of Bayreuth, Universitätsstraße 30, 95447 Bayreuth, Germany
| | - Meike Kuhn
- Dynamics and Structure Formation - Herzig Group, Institute of Physics, University of Bayreuth, Universitätsstraße 30, 95447 Bayreuth, Germany
| | - Eva M Herzig
- Dynamics and Structure Formation - Herzig Group, Institute of Physics, University of Bayreuth, Universitätsstraße 30, 95447 Bayreuth, Germany
| | - Volker Altstädt
- Department of Polymer Engineering, University of Bayreuth, Universitätsstraße 30, 95447 Bayreuth, Germany
| | - Peter Strohriegl
- Department of Macromolecular Chemistry I, University of Bayreuth, Universitätsstraße 30, 95447 Bayreuth, Germany
| | - Jürgen Senker
- Department of Inorganic Chemistry III, University of Bayreuth, Universitätsstraße 30, 95447 Bayreuth, Germany.
| | - Holger Ruckdäschel
- Department of Polymer Engineering, University of Bayreuth, Universitätsstraße 30, 95447 Bayreuth, Germany.
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23
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Nardella F, Bellavia S, Mattonai M, Ribechini E. Co-pyrolysis of biomass and plastic: Synergistic effects and estimation of elemental composition of pyrolysis oil by analytical pyrolysis-gas chromatography/mass spectrometry. BIORESOURCE TECHNOLOGY 2022; 354:127170. [PMID: 35436539 DOI: 10.1016/j.biortech.2022.127170] [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: 02/28/2022] [Revised: 04/12/2022] [Accepted: 04/13/2022] [Indexed: 06/14/2023]
Abstract
This paper presents a study on the pyrolytic behavior of mixtures of lignocellulosic biomass with hydrocarbon plastics using analytical pyrolysis-GC/MS. Semi-quantitative analysis using chromatographic peak areas was used to investigate the composition of the pyrolysis oils and to highlight the occurrence of synergistic effects. A new method is also proposed to estimate the elemental composition of the pyrolysis oil based on the peak areas and brute formulas of the pyrolysis products. The results indicate that synergistic effects during co-pyrolysis favor secondary pyrolysis of holocellulose and polystyrene oligomers, and hinder radical chain-scission of polyethylene chains. H/C and O/C values of the pyrolysis oils were improved by the addition of plastic, indicating a decrease in the content of oxygenated pyrolysis products. The best performances were observed for the mixture containing 70% fir wood and 30% polyethylene, in which synergistic effects led to both an increase of H/C and a decrease of O/C.
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Affiliation(s)
- Federica Nardella
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via G. Moruzzi 13, 56124, Pisa, Italy
| | - Simona Bellavia
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via G. Moruzzi 13, 56124, Pisa, Italy
| | - Marco Mattonai
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via G. Moruzzi 13, 56124, Pisa, Italy.
| | - Erika Ribechini
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via G. Moruzzi 13, 56124, Pisa, Italy
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24
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On-Line Thermally Induced Evolved Gas Analysis: An Update-Part 1: EGA-MS. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27113518. [PMID: 35684458 PMCID: PMC9182359 DOI: 10.3390/molecules27113518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 05/27/2022] [Accepted: 05/28/2022] [Indexed: 11/16/2022]
Abstract
Advances in on-line thermally induced evolved gas analysis (OLTI-EGA) have been systematically reported by our group to update their applications in several different fields and to provide useful starting references. The importance of an accurate interpretation of the thermally-induced reaction mechanism which involves the formation of gaseous species is necessary to obtain the characterization of the evolved products. In this review, applications of Evolved Gas Analysis (EGA) performed by on-line coupling heating devices to mass spectrometry (EGA-MS), are reported. Reported references clearly demonstrate that the characterization of the nature of volatile products released by a substance subjected to a controlled temperature program allows us to prove a supposed reaction or composition, either under isothermal or under heating conditions. Selected 2019, 2020, and 2021 references are collected and briefly described in this review.
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25
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Saliu F, Biale G, Raguso C, La Nasa J, Degano I, Seveso D, Galli P, Lasagni M, Modugno F. Detection of plastic particles in marine sponges by a combined infrared micro-spectroscopy and pyrolysis-gas chromatography-mass spectrometry approach. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 819:152965. [PMID: 35016940 DOI: 10.1016/j.scitotenv.2022.152965] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 12/21/2021] [Accepted: 01/04/2022] [Indexed: 06/14/2023]
Abstract
Plastic pollution threatens the marine environment, especially due to the adverse effects caused by micro and nano particles interacting with the marine biota. In order to provide reliable data regarding micro and nanoplastic contamination and the related impacts, efficient analytical solutions are needed. We developed a new analysis workflow that uses marine sponges to monitor plastic pollution by characterizing the plastic particles accumulated in their tissue. Specimens of cf. Haliclona (Haplosclerida) were sampled in the Maldivian archipelago. The aim was to optimize the method and to carry out a pilot study of the contamination of the related reef habitat. Particles were isolated, size fractioned, counted and submitted to morphological and chemical characterization. The constituting polymer was identified by infrared microspectroscopy for particles >25 μm, and by pyrolysis coupled with gas chromatography mass spectrometry for those <25 μm. Method recoveries were between 87 and 83% and limits of quantitation (LOQs) were between 6.6 and 30.2 ng/g. Analyses showed that 70% of the sponges presented plastic contamination, with an average of 1.2 particles/g tissue for the 25-150 μm size range, and a total plastic concentration of up to 4.8 μg/g in the 0.2-25 μm size range, with polyolefin being the most represented polymer in both size ranges. Overall, the study demonstrated the reliability of the proposed analytical workflow and of the use of sponges as biosamplers for plastic particles.
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Affiliation(s)
- Francesco Saliu
- Earth and Environmental Science Department, University of Milano Bicocca, Piazza della Scienza 1, 20126 Milano, Italy
| | - Greta Biale
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via Moruzzi 13, Pisa, Italy
| | - Clarissa Raguso
- Earth and Environmental Science Department, University of Milano Bicocca, Piazza della Scienza 1, 20126 Milano, Italy
| | - Jacopo La Nasa
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via Moruzzi 13, Pisa, Italy.
| | - Ilaria Degano
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via Moruzzi 13, Pisa, Italy; Center for Instrument Sharing of the University of Pisa (CISUP), University of Pisa, Italy
| | - Davide Seveso
- Earth and Environmental Science Department, University of Milano Bicocca, Piazza della Scienza 1, 20126 Milano, Italy; MaRHE Center (Marine Research and High Education Center), Magoodhoo Island Faafu Atoll, Maldives
| | - Paolo Galli
- Earth and Environmental Science Department, University of Milano Bicocca, Piazza della Scienza 1, 20126 Milano, Italy; MaRHE Center (Marine Research and High Education Center), Magoodhoo Island Faafu Atoll, Maldives
| | - Marina Lasagni
- Earth and Environmental Science Department, University of Milano Bicocca, Piazza della Scienza 1, 20126 Milano, Italy
| | - Francesca Modugno
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via Moruzzi 13, Pisa, Italy; Center for Instrument Sharing of the University of Pisa (CISUP), University of Pisa, Italy.
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26
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Zhao J, Gomes D, Jin L, Mathis SP, Li X, Rouchka EC, Bodduluri H, Conklin DJ, O'Toole TE. Polystyrene bead ingestion promotes adiposity and cardiometabolic disease in mice. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 232:113239. [PMID: 35093814 PMCID: PMC8860873 DOI: 10.1016/j.ecoenv.2022.113239] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 01/18/2022] [Accepted: 01/24/2022] [Indexed: 05/05/2023]
Abstract
Vast amounts of plastic materials are produced in the modern world and despite recycling efforts, large amounts are disposed in water systems and landfills. Under these storage conditions, physical weathering and photochemical processes break down these materials into smaller particles of the micro- and nano-scale. In addition, ecosystems can be contaminated with plastic particles which are manufactured in these size ranges for commercial purposes. Independent of source, microplastics are abundant in the environment and have found their way into water supplies and the food cycle where human exposure is inevitable. Nevertheless, the health consequences of microplastic ingestion, inhalation, or absorption are largely unknown. In this study we sought to determine if ingestion of microplastics promoted pre-clinical cardiovascular disease (CVD). To do this, we supplied mice with normal drinking water or that supplemented with polystyrene beads of two different sizes (0.5 µm and 5 µm) and two different doses (0.1 μg/ml and 1 μg/ml) each for 12 weeks and measured several indices of metabolism and glucose homeostasis. As early as 3 weeks of consumption, we observed an accelerated weight gain with a corresponding increase in body fat for some exposure groups versus the control mice. Some exposure groups demonstrated increased levels of fasting plasma glucose. Those mice consuming the smaller sized beads (0.5 µm) at the higher dose (1 μg/ml), had increased levels of fasting plasma insulin and higher homeostatic model assessment of insulin resistance (HOMA-IR) scores as well. This was accompanied by changes in the gut microbiome consistent with an obese phenotype. Using samples of perivascular adipose tissue collected from the same group, we observed changes in gene expression consistent with increased adipogenesis. These results suggest that ingestion of polystyrene beads promotes a cardiometabolic disease phenotype and thus may be an unrecognized risk factor for CVD.
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Affiliation(s)
- Jingjing Zhao
- Christina Lee Brown Envirome Institute, Department of Medicine, University of Louisville, Louisville, KY, USA
| | - Daniel Gomes
- Christina Lee Brown Envirome Institute, Department of Medicine, University of Louisville, Louisville, KY, USA; Department of Pharmacology and Toxicology, University of Louisville, Louisville, KY, USA
| | - Lexiao Jin
- Christina Lee Brown Envirome Institute, Department of Medicine, University of Louisville, Louisville, KY, USA
| | - Steven P Mathis
- Department of Microbiology and Immunology, James Graham Brown Cancer Center and Center for Microbiomics, Inflammation and Pathogenicity, University of Louisville, Louisville, KY, USA
| | - Xiaohong Li
- Kentucky Biomedical Research Infrastructure Network Bioinformatics Core, University of Louisville, Louisville, KY, USA; Department of Anatomical Sciences and Neurobiology, University of Louisville, Louisville, KY, USA
| | - Eric C Rouchka
- Kentucky Biomedical Research Infrastructure Network Bioinformatics Core, University of Louisville, Louisville, KY, USA; Department of Computer Science and Engineering, University of Louisville, Louisville, KY, USA
| | - Haribabu Bodduluri
- Department of Microbiology and Immunology, James Graham Brown Cancer Center and Center for Microbiomics, Inflammation and Pathogenicity, University of Louisville, Louisville, KY, USA
| | - Daniel J Conklin
- Christina Lee Brown Envirome Institute, Department of Medicine, University of Louisville, Louisville, KY, USA
| | - Timothy E O'Toole
- Christina Lee Brown Envirome Institute, Department of Medicine, University of Louisville, Louisville, KY, USA.
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27
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Witono J, Noordergraaf I, Heeres H, Janssen L. Torque measurement as a tool to monitor the breakdown of cassava starch gels, by the effect of Fenton's initiator for graft copolymerization. RESULTS IN CHEMISTRY 2022. [DOI: 10.1016/j.rechem.2022.100314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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