Oil/Suspended Particulate Material Interactions and Sedimentation

Payne, James R.; Clayton, John R.; Kirstein, B.E.

doi:10.1016/s1353-2561(03)00048-3

Cited by 84 publications

(46 citation statements)

References 53 publications

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“…This can be due to the slow deposition rate of small particles (e.g., clay), to which those petroleum hydrocarbons, especially those > C 13 , adsorb due to their low solubility (43). In the open sea, fine suspended particulate matter settles very slowly (<0.01 mm·s −1 ) (44) and thus remains in the surface layers for extended time periods (45,46). However, those particles can be scavenged by marine snow consisting of diatoms, feces, feeding structures, or detritus, therewith cosedimenting rapidly (47,48).…”

Section: Resultsmentioning

confidence: 99%

Sustained deposition of contaminants from the Deepwater Horizon spill

Yan

Passow

Chanton

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

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The 2010 Deepwater Horizon oil spill resulted in 1.6–2.6 × 1010 grams of petrocarbon accumulation on the seafloor. Data from a deep sediment trap, deployed 7.4 km SW of the well between August 2010 and October 2011, disclose that the sinking of spill-associated substances, mediated by marine particles, especially phytoplankton, continued at least 5 mo following the capping of the well. In August/September 2010, an exceptionally large diatom bloom sedimentation event coincided with elevated sinking rates of oil-derived hydrocarbons, black carbon, and two key components of drilling mud, barium and olefins. Barium remained in the water column for months and even entered pelagic food webs. Both saturated and polycyclic aromatic hydrocarbon source indicators corroborate a predominant contribution of crude oil to the sinking hydrocarbons. Cosedimentation with diatoms accumulated contaminants that were dispersed in the water column and transported them downward, where they were concentrated into the upper centimeters of the seafloor, potentially leading to sustained impact on benthic ecosystems.

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Section: Resultsmentioning

confidence: 99%

Sustained deposition of contaminants from the Deepwater Horizon spill

Yan

Passow

Chanton

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

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“…This natural mechanism contributes to dispersion of spilled oil because it enhances stability of oil droplets in the water column. More recently, it has been suggested that formation of oil mineral aggregates (OMA) may play a major role in the natural cleaning of oiled shorelines and may be the basis for the development of oil spill countermeasure technologies (Bragg, Prince, Harner, & Atlas, 1994;Bragg & Yang, 1993;, 1999J ez equel, Merlin, & Lee, 1999;Kepkay, Bugden, Lee, & Stoffyn-Egli, 2002;Khelifa, Stoffyn-Egli, Hill, & Lee, 2002, 2003a, 2003bLee et al, 2003, Lee, Lunel, Wood, Swannell, & Stoffyn-Egli, 1997Le Floch et al, 2002;Muschenheim & Lee, 2002;Omotoso, Munoz, & Mikula, 2002;Owens, 1999;, 1994Payne, Clayton, & Kirstein, 2003, 1989, 1999Wood, Lunel, Baily, Lee, & Stoffyn-Egli, 1997). Nevertheless, little is known about the influence of water salinity and clay type on OMA formation.…”

Section: Introductionmentioning

confidence: 99%

Effects of salinity and clay type on oil–mineral aggregation

Khelifa

Stoffyn-Egli²,

Hill

et al. 2005

Marine Environmental Research

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“…OMAs vary in buoyancy and can travel in ocean currents, and can thus aid in the proliferation of synthetic dispersants. [11,12] This mechanism could be expected to occur especially in more turbulent, coastal areas, where clay and silica are more abundant and well-mixed.…”

Section: Interpretation Of Cloud Point and Precipitationmentioning

confidence: 99%

“…The various chemical treatments applied to oceanic oil spills contain surfactants and polymers which aim to hasten the breakup of oil slicks into droplets by reducing the surface tension between oil and water. [10] At the same time, the formation of oil-mineralaggregates (OMAs), composed of dispersed oil droplets and clay or silica particles, [11,12] occurs spontaneously through an aggregation method attributable to electrostatic interactions between the particles and polar compounds in oil. [10] The OMAs can be considered as a form of Pickering emulsion, where finely divided oil droplets are stabilized by particles.…”

Section: Introductionmentioning

confidence: 99%

Mono- and Di-valent Salts as Modifiers of PEO-PPO-PEO Block Copolymer Interactions with Silica Nanoparticles in Aqueous Dispersions

Bodratti

Jahan

et al. 2015

Journal of Dispersion Science and Technology

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Colloidal stabilization of nanoparticle dispersions is central to applications including coatings, mineral extraction, and dispersion of oil spills in oceanic environments, which often involves oil-mineral-aggregates (OMAs). We have an ongoing interest in the modulation of amphiphile micellization and adsorption behavior in aqueous colloidal dispersions in the presence of various additives. Here we evaluate the effect of added salts CaCl 2 , MgCl 2 , and NaCl on the micellization and adsorption behavior of the poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) triblock copolymer Pluronic P105 (EO 37 PO 56 EO 37 ). In 0.10 wt% silica nanoparticle (10.6 nm average diameter) dispersion, adsorbed block copolymer layer formation begins at a critical surface micelle concentration (csmc) of 0.02 wt%, well below the critical micellization concentration of Pluronic P105 in water. Dye solubilization experiments demonstrate an increase in the csmc upon addition of each salt. Each added salt reaches a level of maximum effectiveness in its ability to disfavor Pluronic P105 adsorption at the silica surface. These peak levels occur at concentrations of 0.005, 0.03, and 0.05 M for CaCl 2 , MgCl 2 , and NaCl, respectively, in the presence of 0.10 wt% silica nanoparticles. We explain these results in the context of an electrostatic displacer mechanism and discuss possible connections to OMA-dispersant formation.

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Oil/Suspended Particulate Material Interactions and Sedimentation

Cited by 84 publications

References 53 publications

Sustained deposition of contaminants from the Deepwater Horizon spill

Sustained deposition of contaminants from the Deepwater Horizon spill

Effects of salinity and clay type on oil–mineral aggregation

Mono- and Di-valent Salts as Modifiers of PEO-PPO-PEO Block Copolymer Interactions with Silica Nanoparticles in Aqueous Dispersions

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