Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 87 for “"Microplastics"”.
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Adsorption of Organic Pollutants onto Microplastics
<p>Microplastics (MPs) are small plastic pieces with sizes ranging from 1 mm to 5 mm in diameter. Polyethylene (PE) is a common polymer used in plastic material and eventually breaks down to MP size overtime in the environment through a process called weathering. Weathering of MPs alters their …
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Microplastics in Urban Environments: Distribution, Fate, and Transport
Microplastics (MPs) have become a growing environmental concern, particularly in urban areas where anthropogenic activities intensify their presence in ecosystems. This research investigates MPs’ distribution, fate, and transport in urban environments, focusing on stormwater retention (SWR) ponds, …
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Microplastics chemical characterization, regional distribution, and effects on biota
… analysis of the environmental effects of microplastics, with a focus on nurdles (pre-production microplastics) and microfibers . The opening section provides an overview of the pervasive nature of microplastic, and the current methodology used to describe its environmental impact. Chapter …
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Microplastics as a vector for micropollutants in aquatic environments.
… contaminants. It is becoming evident that microplastics can interact with micropollutants when co-existing in the environment. The aim of this thesis was to elucidate the potential role of microplastics as a vector for cyanotoxins (microcystins) and anthropogenic contaminants …
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The fate and impacts of microplastics in marine systems
… Furthering our knowledge of where and why microplastics accumulate is crucial for prioritising conservation efforts. There also remains a dearth of knowledge surrounding the impacts of microplastics on marine taxa, and particularly on ecosystem dynamics. The overall aim of this thesis is to …
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Examining the Atmospheric Transport of Microplastics using the HYSPLIT Model
Microplastics are tiny particles less than 5 mm in size and are a growing scientific concern, given the potential harm caused across ecosystems as plastic use increases globally. To further understand the atmosphere's role, the HYSPLIT model was utilized to identify differences in transport …
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Experimental Investigation on Microplastics Biofouling Rate in an Aquatic System
Microplastics (MPs), small plastic particles under 5 millimeters, are a growing environmental concern in freshwater and marine ecosystems. They originate from numerous sources, can easily move due to their small size, and hold the potential to transport pollutants through their movements in marine …
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Microplastics in saltmarshes: developing extraction methods and examining past accumulation
… biota. However, the sources and accumulation of microplastics on saltmarshes have not yet been subject to detailed research. These environments have the potential to resolve the temporal evolution of plastic pollution since production began, and improve understanding of their fate in the coastal …
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Transport Processes along Riverine Environments and their Impact on Microplastics
Microplastics (MP), small plastic particles less than 5 millimeters in diameter, are persistent environmental contaminants originating from the breakdown of larger plastic waste or their use in products like cosmetics and industrial processes. Found in diverse ecosystems such as oceans, rivers, and …
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Plastics and Microplastics as Vectors for Bacteria and Human Pathogens
… total bacterial community composition over time. Microplastics and paired seawater samples were also collected and examined for the presence and abundance of <em>Vibrio spp</em>. In many instances, vibrios were enriched on plastics by at least two orders of magnitude compared to paired seawater …
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Freshwater fishes and microplastics in an era of multiple stressors
Microplastics, plastics < 5 mm in size, are environmental contaminants typically arising from the breakdown of larger plastics that may cause negative impacts when consumed by freshwater fishes. However, microplastic exposure occurs in combination with other interacting multiple stressors, for …
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Μικροπλαστικά. Προέλευση, διασπορά και επιπτώσεις / Microplastics. Sources, distribution and effects
Τα μικροπλαστικά είναι κομμάτια πλαστικού μικρότερα των 5mm και πλέον είναι διάσπαρτα παγκοσμίως, τόσο στο έδαφος όσο και στις θάλασσες και τον αέρα. Αυτή η εργασία καλύπτει τη ροή των μικρών αυτών σωματιδίων, από τη στιγμή της «παραγωγής» τους, τους τρόπους διασποράς στο περιβάλλον αλλά και τις …
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Microplastics as Contaminant Vectors: Influencing the Bioaccessibility of Naphthalene from Freshwater
Microplastics (MPs) are found throughout the environment and pose risks to human health as particulate pollutants. In addition, they have the potential to transfer environmental contaminants to humans and other sensitive receptors. However, there is a paucity of information on the vector effects of …
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Oxidation of Microplastics: Evidenced by Spectroscopy, Hydrophilicity, and Heavy Metal Uptake
<p>Two weathering methods of pristine microplastics have been studied and compared to determine the best combination for the desired weathering results, chemical versus irradiation. The chemical weathering was studied using various temperatures, pH values and contact time. Irradiation studies were …
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Studies of microplastics present in sewage sludge, effects on amended agricultural soils
… alarm and social sensitivity revealed that microplastics (MPs) are the most notable type of plastic degradation and pollution that has attracted much attention among researchers, who have detected MP traces in marine and terrestrial environments. Facing the problem of MPs accumulation that …
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Impact of pollution sources of microplastics and associated microbial populations in surface water
Submitted in fulfilment of the academic requirement for the degree of Masters in Applied Sciences: Biotechnology, Durban University of Technology, Durban, South Africa, 2024.
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