Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effects of Microplastic Size on Oil Dispersion in Oceans
Oil spills are a major concern in oceans. Chemical dispersants are widely used as effective oil spill treating agents in the marine environment, especially in cold regions. Microplastics (MPs) are widely observed in oil-polluted oceans. Understanding how MPs affect oil dispersion thus becomes essential. Recent studies presented the negative influence of MPs on oil dispersion effectiveness due to the existence of MP-oil-dispersant agglomerates (MODAs). However, it is still unclear how MPs with various particle sizes would interact with oils during dispersion using different dispersant-to-oil volumetric ratios (DORs). Our study explored the effects of MPs with five sizes on oil dispersion under two DORs. Polyethylene (PE) MPs (7, 13, 23, 40, 90 μm) were applied. Newfoundland offshore and low sulfur crude oils were used. Corexit EC9500A was selected as the chemical dispersant. Results indicated that MPs affected oil dispersion effectiveness under various conditions owing to MODA resurfacing. The dispersion effectiveness of low sulfur oil at DOR 1:100 was between 21.43 ± 3.72 and 35.47 ± 3.06%, with MP size rising. With Newfoundland offshore oil, the dispersion effectiveness was greater than Low Sulfur oil. It increased obviously from 57.62 ± 3.46 to 88.42 ± 14.23% under DOR 1:100 with MP size rising. The oil droplet size of Newfoundland offshore was smaller than that of low sulfur under both DORs. Findings from this research will provide fundamental data for future decision-making on oil spill response in cold regions in the presence of MPs.
Effects of Microplastic Size on Oil Dispersion in Oceans
Oil spills are a major concern in oceans. Chemical dispersants are widely used as effective oil spill treating agents in the marine environment, especially in cold regions. Microplastics (MPs) are widely observed in oil-polluted oceans. Understanding how MPs affect oil dispersion thus becomes essential. Recent studies presented the negative influence of MPs on oil dispersion effectiveness due to the existence of MP-oil-dispersant agglomerates (MODAs). However, it is still unclear how MPs with various particle sizes would interact with oils during dispersion using different dispersant-to-oil volumetric ratios (DORs). Our study explored the effects of MPs with five sizes on oil dispersion under two DORs. Polyethylene (PE) MPs (7, 13, 23, 40, 90 μm) were applied. Newfoundland offshore and low sulfur crude oils were used. Corexit EC9500A was selected as the chemical dispersant. Results indicated that MPs affected oil dispersion effectiveness under various conditions owing to MODA resurfacing. The dispersion effectiveness of low sulfur oil at DOR 1:100 was between 21.43 ± 3.72 and 35.47 ± 3.06%, with MP size rising. With Newfoundland offshore oil, the dispersion effectiveness was greater than Low Sulfur oil. It increased obviously from 57.62 ± 3.46 to 88.42 ± 14.23% under DOR 1:100 with MP size rising. The oil droplet size of Newfoundland offshore was smaller than that of low sulfur under both DORs. Findings from this research will provide fundamental data for future decision-making on oil spill response in cold regions in the presence of MPs.
Effects of Microplastic Size on Oil Dispersion in Oceans
Lecture Notes in Civil Engineering
Gupta, Rishi (Herausgeber:in) / Sun, Min (Herausgeber:in) / Brzev, Svetlana (Herausgeber:in) / Alam, M. Shahria (Herausgeber:in) / Ng, Kelvin Tsun Wai (Herausgeber:in) / Li, Jianbing (Herausgeber:in) / El Damatty, Ashraf (Herausgeber:in) / Lim, Clark (Herausgeber:in) / Yang, Min (Autor:in) / Zhang, Baiyu (Autor:in)
Canadian Society of Civil Engineering Annual Conference ; 2022 ; Whistler, BC, BC, Canada
Proceedings of the Canadian Society of Civil Engineering Annual Conference 2022 ; Kapitel: 85 ; 1335-1342
17.08.2023
8 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch