Settling of dilbit-derived oil-mineral aggregates (OMAs) &amp; transport parameters for oil spill modelling

O’Laughlin, Casey; Law, Brent; Zions, Vanessa; King, Thomas; Robinson, Brian; Wu, Yongsheng

doi:10.1016/j.marpolbul.2017.07.042

Cited by 24 publications

(20 citation statements)

References 39 publications

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“…The results presented above indicate unique differences of floccualtion characteristics between Kaolinite and Bentonite OMAs which may be closely influenced by the OMA structures. Previously, this hasn't been clearly revealed by studying the natural mixture sediment samples directly (e.g., Khelifa et al 2005bKhelifa et al , 2008Sun et al 2010Sun et al , 2013O'Laughlin et al 2017). Kaolinite particles tend to show lower cohesion and the resulting oil-Kaolinite aggregates can be categorized as droplet OMAs.…”

Section: Discussionmentioning

confidence: 99%

“…The Bentonite aggregates tend to re-shape and absorb or be absorbed by the oil droplets forming large (as large as 900 microns floc has been observed) dense oil-Bentonite aggregates (Figure4b2−4 ). Previous experimental work also indicates that the oil-sediment aggregates formed using natural sediment can be as large as 900 microns(O'Laughlin et al, 2017) and their settling velocity can be variable depending on oil amount trapped in sediment mixture aggregates(Sun et al, 2010). They also suggest that higher sediment concentration may lead to larger flocs with higher settling velocity.…”

mentioning

confidence: 94%

“…These oil spill accidents pose detrimental impacts on sea-based human activities (Peterson et al, 2003), ecosystem contamination of aquatic bio-communities (Ainsworth et al, 2018) such as fishes (Murawski et al, 2014), birds (Henkel et al, 2012), coral (White et al, 2012) or plankton (Almeda et al, 2013(Almeda et al, , 2016. Although most mitigation methods focus on spilt oil floating onto the water surface (Reddy et al, 2002(Reddy et al, , 2012Liu et al, 2012), there can be a considerable portion of spilt oil settles to the sea-floor after flocculating with natural cohesive materials, including sediments and organic particles (Chanton et al, 2014;Yan et al, 2016;Jones and Bridgeman, 2016;Romero et al, 2017;O'Laughlin et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…Through settling and deposition, the oil mineral aggregates may eventually preserving in the sea-floor depositions over geological time (Romero et al, 2017). Therefore, the interactions of oil and aquatic mineral particles, or biological materials can play an important role in the fate of spilt oil (Khelifa et al, 2002(Khelifa et al, , 2005aPassow and Hetland, 2016;O'Laughlin et al, 2017). This study focuses on the influence of mineral sediments on oil droplets through flocculation.…”

Section: Introductionmentioning

confidence: 99%

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Oil-mineral flocculation and settling velocity in saline water

Manning

Hsu

2020

Water Research

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Cohesive particles in aquatic systems can play an important role in determining the eventual fate of spilled oil via the generation of Oil-Mineral Aggregates (OMAs). Series of laboratory experiments have been conducted aiming at filling the knowledge gap regarding how cohesive clay particles influence the accumulation of petroleum through forming different aggregate structures and their resulting settling velocity. OMAs have been successfully created in a stirring jar with artificial sea-water, crude oil and two types of most common natural cohesive minerals, Kaolinite and Bentonite clay. With the magnetic stirrer adjusted to 490 rpm to provide a high level homogeneous flow turbulence (Turbulence dissipation estimated to be about 0.02 m 2 •s −3 ), droplet OMAs and flake/solid OMAs have been obtained in oil-Kaolinite sample and oil-Bentonite sample, respectively. Kaolinite clay with relatively low flocculation rate (R f = 0.13 min −1

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Oil-mineral flocculation and settling velocity in saline water

Manning

Hsu

2020

Water Research

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“…The amount and type of suspended sediment affect not only the amount of oil trapped in OPAs but also the size and type of OPAs that are formed (Cloutier et al, ; Guyomarch et al, ; Omotoso et al, ; Stoffyn‐Egli & Lee, ). For example, O'Laughlin et al () observed that an increase in sediment concentration corresponded to an increase in OPA size and Stoffyn‐Egli and Lee () observed that by varying the sediment type they could produce either droplet, solid, or flake OPAs.…”

Section: Formationmentioning

confidence: 99%

Formation, Fate, and Impacts of Microscopic and Macroscopic Oil‐Sediment Residues in Nearshore Marine Environments: A Critical Review

Gustitus

Clement

2017

Reviews of Geophysics

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Crude oil that is spilled in marine environments often interacts with suspended sediments to form residues that can impact the recovery of the affected nearshore ecosystems. When spilled oil and sediment interact, they can form either small microscopic aggregates, commonly referred to as oil‐particle aggregates, or large macroscopic agglomerates, referred to as sediment‐oil agglomerates or sediment‐oil mats. Although these different sized oil‐sediment residues have similar compositions, they are formed under different conditions and have different fates in nearshore environments; the goal of this review is to synthesize our current understanding of these two types of residues. We believe that researchers who focus solely on studying either microscopic aggregates or macroscopic agglomerates could benefit from understanding the research findings available in the other field. In this study, we compare and contrast various processes that control the formation, fate, and impacts of these two types of residues in nearshore environments and point out some of the knowledge gaps in this field. Additionally, these residues have been referred to by many names in the past, leading to confusion and misconceptions at times. In this effort, we recommend a uniform nomenclature to distinguish them based on their physical size. Our overall aim is to bridge the gap between microscopic and macroscopic oil‐sediment residue literature to foster a robust exchange of ideas, which we believe can lead to the development of efficient strategies for managing oil spills that affect nearshore environments.

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Freshwater Sediment Toxicity Evaluation from Meso‐Scale Spill Tests of Diluted Bitumen and Conventional Crude

Mehler

Xin

Giacomin

et al. 2022

Enviro Toxic and Chemistry

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Oil and gas development and transportation in many areas of the world, such as the oil sands region of Alberta, Canada, are heavily monitored to minimize the environmental impacts of development and the risk of oil spills. However, oil spills to aquatic environments still occur. Although the science of oil spills has received considerable attention of late, uncertainty still remains in evaluating the fate and transport of oil spills as well as the effects of those spills on aquatic biota. Experiments using meso-scale spill tanks were used to examine the physical and chemical behavior of two types of oil, conventional crude (CC) and diluted bitumen (DB), under similar environmentally relevant scenarios (i.e., volume of spill, temperature, duration, wave action, and presence of river sediment). In addition, biological impact assessments via sediment toxicity testing collected from the oil spill tests were conducted. Sediments were evaluated for acute toxicity using three standard sediment test species: Hyalella azteca, Lumbriculus variegatus, and Chironomus dilutus. Sediments collected from the CC simulated spill showed a higher level of acute toxicity than sediments collected from spills with DB. Higher toxicity in the CC-contaminated sediment was supported by higher concentrations of low molecular weight polycyclic aromatic hydrocarbons (PAHs) when compared with the DB-contaminated sediment, while the remaining PAH profile was similar between the contaminated sediments. The use of a meso-scale spill tank in combination with sediment bioassays allowed for the evaluation of oil spills under controlled and environmentally relevant conditions (e.g., nearshore high sediment loading river), and in turn provides assessors with additional information to identify the appropriate mitigation and remediation efforts needed in the event of future spills.

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Settling of dilbit-derived oil-mineral aggregates (OMAs) & transport parameters for oil spill modelling

Cited by 24 publications

References 39 publications

Oil-mineral flocculation and settling velocity in saline water

Oil-mineral flocculation and settling velocity in saline water

Formation, Fate, and Impacts of Microscopic and Macroscopic Oil‐Sediment Residues in Nearshore Marine Environments: A Critical Review

Freshwater Sediment Toxicity Evaluation from Meso‐Scale Spill Tests of Diluted Bitumen and Conventional Crude

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